eCFR Atlas
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Code of Federal Regulations

How much regulation, and whose?

Every figure here is a measurement taken by parsing the eCFR's own XML. Where a value could not be measured it appears as an em dash carrying the reason, never as zero. Current as of September 30, 2026.

Total federal regulationⓘ

94,491,695

Every word of every rule, counted once. Where a rule is managed by more than one agency, its words are split evenly between them — never counted twice. This is the honest answer to “how much federal regulation is there?”.

Counting shared rules once per agencyⓘ

97,565,429

A shared scope counted in full for every agency claiming it, so a scope with n claimants lands in this total n times. That makes it larger than the deduplicated figure by more than the shared words below — a scope shared six ways adds five extra copies of itself, not one. Use it to ask what one agency is responsible for; never sum it across agencies.

Rules managed by more than one agencyⓘ

979,020

17 areas of the rulebook have more than one agency in charge — 1.0% of all regulation. See who shares what →

Agencies

316

Details →

Titlesⓘ

50

1 reserved and therefore empty by definition.

Details →

Parts

9,666

227,314 sections across 473 chapters.

Unmeasured nodes

0

Of 274,910 structure nodes. Every one is listed with its reason.

Details →

Agencies with the most regulation

Top 12 agencies
Amendments published, all titles 76,501 amendments, Oct 2023 – Sep 2026
Oct 2023 Sep 2026

All agencies

316 agencies and sub-agencies. How these are counted →

Agency Share Total Scopes Coverage
Environmental Protection Agency shared ×2 13,881,407 13,887,627 7
Internal Revenue Service, Department of Treasury 11,481,879 11,481,879 1
United States Fish and Wildlife Service, Department of Interior shared ×1 2,654,460 2,673,247 3
Centers for Medicare & Medicaid Services, Department of Health and Human Services 2,458,318 2,458,318 1
Food and Drug Administration, Department of Health and Human Services 2,311,708 2,311,708 1
Coast Guard, Department of Homeland Security 2,186,769 2,186,769 3
Federal Communications Commission 1,958,475 1,958,475 3
Federal Reserve System 1,654,294 1,654,294 1
Occupational Safety and Health Administration, Department of Labor 1,591,421 1,591,421 1
Securities and Exchange Commission 1,465,954 1,465,954 2
Department of Energy 1,374,971 1,386,959 7
Federal Aviation Administration, Department of Transportation 1,285,756 1,285,756 1
Agricultural Marketing Service, Department of Agriculture 1,252,822 1,252,822 6
Nuclear Regulatory Commission 1,226,959 1,226,959 4
Department of Veterans Affairs 1,220,122 1,220,122 3
Department of Justice shared ×3 1,217,912 1,229,217 8
Consumer Financial Protection Bureau 1,192,930 1,192,930 2
U.S. Customs and Border Protection, Department of Homeland Security 1,079,600 1,079,600 1
Department of Defense shared ×1 1,038,626 1,567,818 4
Office of Personnel Management shared ×1 968,253 969,543 7
Federal Acquisition Regulatory Council 919,548 919,548 1
Department of Health and Human Services 916,680 916,680 4
Rural Utilities Service, Department of Agriculture shared ×3 875,152 1,311,384 4
Social Security Administration 827,415 827,415 3
National Highway Traffic Safety Administration, Department of Transportation shared ×2 818,902 839,552 4
Animal and Plant Health Inspection Service, Department of Agriculture 814,110 814,110 2
Alcohol and Tobacco Tax and Trade Bureau, Department of Treasury 793,333 793,333 1
Pipeline and Hazardous Materials Safety Administration, Department of Transportation 771,604 771,604 1
Commodity Futures Trading Commission 768,079 768,079 2
Federal Railroad Administration, Department of Transportation 760,425 760,425 1
Food and Nutrition Service, Department of Agriculture 712,473 712,473 1
Federal Deposit Insurance Corporation 707,315 707,315 2
Federal Energy Regulatory Commission, Department of Energy 698,999 698,999 2
Comptroller of the Currency, Department of Treasury 689,650 689,650 1
Bureau of Industry and Security, Department of Commerce 629,621 629,621 1
Bureau of Land Management, Department of Interior 624,669 624,669 1
Office of Assistant Secretary for Housing - Federal Housing Commissioner, Department of Housing and Urban Development 618,320 618,320 3
Office of Postsecondary Education, Department of Education 589,609 589,609 1
Department of Homeland Security 580,535 580,535 3
National Oceanic and Atmospheric Administration National Marine Fisheries Service, Department of Commerce 541,192 541,192 1
Employment and Training Administration, Department of Labor 528,688 528,688 1
Bureau of Indian Affairs, Department of Interior shared ×1 527,276 541,910 2
Office of the Secretary, Department of Defense 524,262 1,048,525 1
Wage and Hour Division, Department of Labor 523,162 523,162 1
Department of State shared ×1 516,587 518,332 4
Public Health Service, Department of Health and Human Services 502,720 525,609 1
Consumer Product Safety Commission 502,470 502,470 2
Office of Foreign Assets Control, Department of Treasury 468,022 468,022 1
Defense Acquisition Regulations System, Department of Defense 450,024 450,024 1
Small Business Administration 449,410 449,410 2
Office of Secretary of Transportation, Department of Transportation 443,442 443,442 1
Commodity Credit Corporation, Department of Agriculture 437,357 437,357 1
Employee Benefits Security Administration, Department of Labor 409,330 409,330 1
National Oceanic and Atmospheric Administration, Department of Commerce shared ×1 401,990 420,777 3
Federal Motor Carrier Safety Administration, Department of Transportation 400,523 400,523 1
Office of Secretary, Department of Housing and Urban Development 397,784 397,784 1
National Credit Union Administration 395,201 395,201 2
Federal Trade Commission 393,844 393,844 2
Office of Assistant Secretary for Public and Indian Housing, Department of Housing and Urban Development 390,562 390,562 1
Office of Secretary of the Interior, Department of Interior 389,210 389,210 1
Army Corps of Engineers, Department of Defense 380,896 380,896 2
Office of Secretary of Agriculture, Department of Agriculture 371,835 371,835 1
Office of Surface Mining Reclamation and Enforcement, Department of Interior 370,929 370,929 1
Mine Safety and Health Administration, Department of Labor 364,555 364,555 1
Office of Secretary of Labor, Department of Labor 362,414 362,414 1
Federal Housing Finance Agency 329,841 329,841 2
Federal Highway Administration, Department of Transportation shared ×1 329,090 348,040 2
Federal Emergency Management Agency, Department of Homeland Security 316,890 316,890 1
Rural Housing Service, Department of Agriculture shared ×2 313,074 633,507 3
Food Safety and Inspection Service, Department of Agriculture 313,003 313,003 1
United States Patent and Trademark Office, Department of Commerce 308,273 308,273 1
National Park Service, Department of Interior 277,273 277,273 1
Rural Business-Cooperative Service, Department of Agriculture shared ×3 276,015 712,245 3
Surface Transportation Board 270,495 270,495 1
Agency for International Development 267,355 267,355 3
Office of Secretary (Aviation Proceedings), Department of Transportation 263,163 263,163 1
Forest Service, Department of Agriculture 261,592 261,592 1
National Aeronautics and Space Administration 260,385 260,385 4
Office of the Secretary of Homeland Security, Department of Homeland Security 254,562 254,562 1
Equal Employment Opportunity Commission 241,588 241,588 2
Farm Credit Administration 241,532 241,532 2
Railroad Retirement Board 238,035 238,035 1
Office of Secretary of the Treasury, Department of Treasury 233,101 233,101 1
Farm Service Agency, Department of Agriculture 226,472 226,472 1
Office of Special Education and Rehabilitative Services, Department of Education 224,703 224,703 1
Office of Management and Budget shared ×1 218,748 257,682 4
Pension Benefit Guaranty Corporation 217,328 217,328 1
Executive Office for Immigration Review, Department of Justice 211,173 211,173 1
Federal Property Management Regulations System 209,150 289,581 1
Federal Election Commission 208,903 208,903 2
Office of Workers' Compensation Programs, Department of Labor 205,913 205,913 2
United States Postal Service 200,247 200,247 2
Administration for Children and Families, Department of Health and Human Services 199,605 199,605 1
U.S. Copyright Office, Library of Congress 194,109 194,109 1
Maritime Administration, Department of Transportation 193,326 193,326 1
Office of Assistant Secretary for Community Planning and Development, Department of Housing and Urban Development 173,471 173,471 1
Corporation for National and Community Service 168,562 168,562 3
Office of Government Ethics 166,858 166,858 1
Drug Enforcement Administration, Department of Justice 161,184 161,184 1
Bureau of Safety and Environmental Enforcement, Department of Interior 160,410 160,410 1
Federal Maritime Commission 159,472 159,472 1
General Services Administration 153,502 218,485 3
Architectural and Transportation Barriers Compliance Board 150,032 150,032 1
Fiscal Service, Department of Treasury 147,478 294,956 1
Bureau of the Fiscal Service, Department of Treasury 147,478 294,956 1
Bureau of Ocean Energy Management, Department of Interior 142,070 142,070 1
Office of Secretary of Education, Department of Education 140,724 140,724 1
International Trade Administration, Department of Commerce 140,429 140,429 2
National Archives and Records Administration 134,580 134,580 3
Office of Natural Resources Revenue, Department of Interior 130,428 130,428 1
United States International Trade Commission 127,429 127,429 1
Transportation Security Administration, Department of Homeland Security 121,311 121,311 1
National Indian Gaming Commission, Department of Interior 121,155 121,155 1
National Science Foundation 120,150 120,150 4
National Foundation on the Arts and the Humanities 118,739 118,739 1
Office of Secretary of Commerce, Department of Commerce 116,837 116,837 1
Bureau of Alcohol, Tobacco, Firearms, and Explosives, Department of Justice 116,493 116,493 1
Office of Federal Contract Compliance Programs, Department of Labor 105,974 105,974 1
Tennessee Valley Authority 103,012 103,012 2
Postal Regulatory Commission 100,025 100,025 2
Financial Crimes Enforcement Network, Department of Treasury 99,157 99,157 1
National Institute of Food and Agriculture, Department of Agriculture 95,705 95,705 1
Office of Elementary and Secondary Education, Department of Education 85,937 85,937 1
Natural Resources Conservation Service, Department of Agriculture 80,378 80,378 1
Office of Investment Security, Department of Treasury 79,183 79,183 1
Bureau of Prisons, Department of Justice 78,621 78,621 1
Federal Aviation Administration Commercial Space Transportation, Department of Transportation 77,196 77,196 1
Office of Inspector General-Health Care, Department of Health and Human Services 76,767 76,767 1
National Labor Relations Board 76,497 76,497 2
Federal Retirement Thrift Investment Board 74,795 74,795 2
Federal Transit Administration, Department of Transportation 73,849 73,849 1
Copyright Royalty Board, Library of Congress 71,567 71,567 1
Bureau of Reclamation, Department of Interior 69,024 69,024 1
Office of Administration for Children and Families Child Support Enforcement (Child Support Enforcement Program), Department of Health and Human Services 67,758 67,758 1
Department of Treasury shared ×1 67,041 72,269 6
Office of Administration for Children and Families Family Assistance (Assistance Programs), Department of Health and Human Services 65,689 65,689 1
Federal Mediation and Conciliation Service 65,304 65,304 2
National Institute of Standards and Technology, Department of Commerce 64,685 64,685 2
Merit Systems Protection Board 64,213 64,213 2
Legal Services Corporation 63,269 63,269 1
Office of Administration for Children and Families Refugee Resettlement, Department of Health and Human Services 62,975 62,975 1
United States Agency for Global Media 62,389 62,389 2
Office for Civil Rights, Department of Education 61,071 61,071 1
Federal Service Impasses Panel , Federal Labor Relations Authority 60,768 79,013 1
Federal Travel Regulation System 57,802 57,802 1
Government Accountability Office 56,875 56,875 1
Office of Assistant Secretary for Equal Opportunity, Department of Housing and Urban Development 54,695 54,695 1
Office of Labor-Management Standards, Department of Labor 54,662 54,662 2
Information Security Oversight Office, National Archives and Records Administration 52,858 52,858 1
National Transportation Safety Board 51,944 51,944 1
Department of Transportation shared ×1 51,142 51,890 4
Selective Service System 49,325 49,325 1
Community Development Financial Institutions Fund, Department of Treasury 49,062 49,062 1
Office of Navajo and Hopi Indian Relocation 48,349 48,349 1
Department of Commerce shared ×1 43,975 44,722 3
Presidio Trust 43,501 43,501 1
Occupational Safety and Health Review Commission 42,277 42,277 1
Department of Interior 42,171 42,203 4
Peace Corps 40,992 40,992 2
Office of Federal Procurement Policy, Office of Management and Budget shared ×1 38,934 77,868 1
Department of Homeland Security Acquisition Regulation 38,909 38,909 1
Federal Crop Insurance Corporation, Department of Agriculture 38,890 38,890 1
Indian Health Service, Department of Health and Human Services shared ×1 37,523 75,046 2
Office of Indian Affairs Assistant Secretary, Department of Interior 36,798 36,798 1
Department of Agriculture 36,684 36,684 6
Export-Import Bank of the United States 34,589 34,589 3
Pennsylvania Avenue Development Corporation 34,405 34,405 1
Foreign Agricultural Service, Department of Agriculture 33,958 33,958 1
Department of Housing and Urban Development 33,886 33,886 3
Economic Development Administration, Department of Commerce 33,632 33,632 1
Office of and Adult Education Technical Career, Department of Education 32,902 32,902 1
Office of Assistant Secretary for Veterans' Employment and Training Service, Department of Labor 32,749 32,749 2
Committee for Purchase From People Who Are Blind or Severely Disabled 32,237 32,237 1
Department of Labor 32,084 32,084 4
Office of United States Trade Representative 31,772 31,772 1
Bureau of Census, Department of Commerce 30,499 30,499 1
African Development Foundation 29,915 29,915 2
Federal Mine Safety and Health Review Commission 29,725 29,725 2
Human Resources Management System (Homeland Security - Office of Personnel Management), Department of Homeland Security 29,556 29,556 1
Advisory Council on Historic Preservation 29,405 29,405 1
Court Services and Offender Supervision Agency for the District of Columbia 29,246 29,246 2
Central Intelligence Agency 29,244 29,244 1
Delaware River Basin Commission 27,735 27,735 1
Water Resources Council 27,512 27,512 1
Office of Science and Technology Policy, Executive Office of the President shared ×1 26,507 38,907 2
National Capital Planning Commission 25,876 25,876 2
Susquehanna River Basin Commission 25,711 25,711 1
United States International Development Finance Corporation 24,743 24,743 3
General Counsel of the Federal Labor Relations Authority shared ×1 24,615 55,603 2
Defense Nuclear Facilities Safety Board 24,418 24,418 1
Commission on Civil Rights 24,355 24,355 2
Inter-American Foundation 24,012 24,012 2
Chemical Safety and Hazard Investigation Board 23,947 23,947 1
Monetary Offices, Department of Treasury 23,495 23,495 1
Federal Financial Institutions Examination Council 22,952 22,952 1
Farm Credit System Insurance Corporation 22,281 22,281 2
United States Section United States and Mexico International Boundary and Water Commission 21,697 21,697 1
Financial Stability Oversight Council 21,261 21,261 1
Utah Reclamation Mitigation and Conservation Commission 21,029 21,029 1
Commission of Fine Arts 20,877 20,877 1
Department of Education Acquisition Regulation 20,644 20,644 1
Joint Board for the Enrollment of Actuaries 20,468 20,468 1
Election Assistance Commission 20,185 20,185 2
Great Lakes St. Lawrence Seaway Development Corporation, Department of Transportation 19,640 19,640 1
National Counterintelligence Center 19,112 19,112 1
Office of Director of National Intelligence shared ×1 18,740 20,030 2
Office of Secretary (Housing Assistance Programs and Public and Indian Housing Programs), Department of Housing and Urban Development 17,178 17,178 1
Foreign Claims Settlement Commission of the United States, Department of Justice 16,733 16,733 1
Foreign-Trade Zones Board, Department of Commerce 16,551 16,551 1
National Security Council, Executive Office of the President shared ×1 16,111 28,511 2
Office of Housing and Multifamily Housing Assistance Restructuring, Department of Housing and Urban Development 16,068 16,068 1
Civilian Board of Contract Appeals, General Services Administration 15,315 15,315 1
Office of Special Counsel 14,794 14,794 2
Council of the Inspectors General on Integrity and Efficiency 13,919 13,919 1
National Mediation Board 13,320 13,320 2
Emergency Oil and Gas Guaranteed Loan Board 13,260 13,260 1
Office of Independent Counsel 13,181 13,181 1
Millennium Challenge Corporation 12,953 12,953 1
Emergency Steel Guarantee Loan Board 12,909 12,909 1
National Council on Disability 12,733 12,733 2
Library of Congress 12,395 12,395 1
Coast Guard (Great Lakes Pilotage), Department of Homeland Security 12,325 12,325 1
Federal Labor Relations Authority 12,256 30,296 2
Administrative Conference of the United States 12,031 12,031 1
Marine Mammal Commission 11,985 11,985 1
American Battle Monuments Commission 11,688 11,688 1
Gulf Coast Ecosystem Restoration Council 11,447 11,447 2
Agricultural Research Service, Department of Agriculture 11,261 11,261 1
Council on Environmental Quality, Executive Office of the President 10,941 10,941 1
Federal Prison Industries, Department of Justice 10,502 10,502 1
Special Inspector General for Afghanistan Reconstruction 10,473 10,473 1
Administrative Committee of the Federal Register 10,301 10,301 1
Privacy and Civil Liberties Oversight Board 10,253 10,253 1
Benefits Review Board, Department of Labor 9,855 9,855 1
National Commission on Military, National, and Public Service 9,498 9,498 1
United States International Development Cooperation Agency 9,466 9,466 1
National Telecommunications and Information Administration, Department of Commerce shared ×1 9,382 11,081 3
James Madison Memorial Fellowship Foundation 9,248 9,248 1
Office of the Intellectual Property Enforcement Coordinator, Executive Office of the President 9,178 9,178 1
Office of Advocacy and Outreach, Department of Agriculture 9,094 9,094 1
National Commission on Libraries and Information Science 9,093 9,093 1
National Railroad Passenger Corporation 8,990 8,990 1
Office of Inspector General, Housing and Urban Development, Department of Housing and Urban Development 8,952 8,952 1
Harry S. Truman Scholarship Foundation 8,937 8,937 1
Nuclear Waste Technical Review Board 8,917 8,917 1
Office of National Drug Control Policy 8,870 8,870 2
Foreign Service Labor Relations Board shared ×2 8,631 25,892 2
Morris K. Udall and Stewart L. Udall Foundation 8,196 8,196 1
Government National Mortgage Association, Department of Housing and Urban Development 7,751 7,751 1
Office of Under-Secretary for Economic Affairs, Department of Commerce 7,165 7,165 1
Office of Federal Housing Enterprise Oversight, Department of Housing and Urban Development 7,160 7,160 1
Armed Forces Retirement Home 6,645 6,645 2
Defense Logistics Agency, Department of Defense 6,459 6,459 2
Foreign Service Grievance Board 6,386 6,386 1
Office of Energy Policy and New Uses, Department of Agriculture 6,315 6,315 1
National Technical Information Service, Department of Commerce 6,239 6,239 1
Office of Transportation, Department of Agriculture 6,229 6,229 1
Department of Education 6,179 6,179 2
Bureau of Economic Analysis, Department of Commerce 6,177 6,177 1
Air Transportation System Stabilization 5,984 5,984 1
Indian Arts and Crafts Board, Department of Interior 5,616 5,616 1
Federal Acquisition Security Council 5,530 5,530 1
Denali Commission 5,369 5,369 1
National Crime Prevention and Privacy Compact Council 5,313 5,313 1
United States and Canada International Joint Commission 4,336 4,336 1
Geological Survey, Department of Interior 4,334 4,334 1
Office of Financial Research, Department of Treasury 4,166 4,166 1
Employees' Compensation Appeals Board, Department of Labor 3,995 3,995 1
Executive Office of the President 3,961 3,961 1
Neighborhood Reinvestment Corporation 3,886 3,886 1
Office of Special Trustee for American Indians, Department of Interior 3,834 3,834 1
United States Institute of Peace 3,553 3,553 1
Arctic Research Commission 3,526 3,526 1
Japan-United States Friendship Commission 3,482 3,482 1
National Commission for Employment Policy 3,481 3,481 1
Office for Micronesian Status Negotiations 3,445 3,445 1
Military Compensation and Retirement Modernization Commission 3,410 3,410 1
Institute of Museum and Library Services, National Foundation on the Arts and the Humanities 3,293 3,293 2
Secret Service, Department of Homeland Security 3,107 3,107 1
Offices of Independent Counsel, Department of Justice 3,103 3,103 1
Foreign Service Impasse Disputes Panel shared ×1 3,039 8,339 2
Office of Vice President of the United States 2,942 2,942 1
Office of Procurement and Property Management, Department of Agriculture 2,833 2,833 1
Office of Inspector General, Department of Agriculture 2,711 2,711 1
Smithsonian Institution 2,455 2,455 1
Office of Environmental Quality, Department of Agriculture 2,227 2,227 1
National Agricultural Statistics Service, Department of Agriculture 2,054 2,054 1
Office of Operations, Department of Agriculture 2,013 2,013 1
International Organizations Employees Loyalty Board 1,910 1,910 1
Economic Research Service, Department of Agriculture 1,903 1,903 1
Board of Governors of the Federal Reserve System 1,882 1,882 1
Northeast Interstate Low-Level Radioactive Waste Commission 1,676 1,676 1
National Endowment for the Humanities, National Foundation on the Arts and the Humanities 1,511 1,511 2
Bureau of Engraving and Printing, Department of Treasury 1,497 1,497 1
National Endowment for the Arts, National Foundation on the Arts and the Humanities 1,396 1,396 2
First Responder Network Authority 1,375 1,375 1
President's Commission on White House Fellowships 1,295 1,295 1
Office of Federal Register, National Archives and Records Administration 1,231 1,231 1
Minority Business Development Agency, Department of Commerce 1,090 1,090 1
National Railroad Adjustment Board 1,088 1,088 1
Office of Information Resources Management, Department of Agriculture 1,050 1,050 1
Office of Administration for Children and Families Community Services, Department of Health and Human Services 866 866 1
Interstate Commerce Commission 854 854 1
Federal Law Enforcement Training Center, Department of Homeland Security 736 736 1
Construction Industry Collective Bargaining Commission 731 731 1
Department of Navy Acquisition Regulations, Department of Defense 706 706 1
World Agricultural Outlook Board, Department of Agriculture 598 598 1
Office of Chief Financial Officer, Department of Agriculture 508 508 1
Oklahoma City National Memorial Trust 424 424 1
Federal Permitting Improvement Steering Council 105 105 1
Appalachian Regional Commission 41 41 1
Office of Bilingual Education and Minority Languages Affairs, Department of Education 0 0 1
East-West Foreign Trade Board 0 0 1
Federal Financing Bank 0 0 1
Federal Procurement Regulations System 0 0 1
National Geospatial-Intelligence Agency, Department of Defense 0 0 0

Default order is share of regulation, highest first — jointly managed rules split evenly, so shares can be compared fairly. Agencies whose total could not be measured sort last in both directions — they are not zero.