Lists of counties in the United States

The following are lists of U.S. counties and county-equivalents by various criteria.
By state
- Alabama
- Alaska boroughs and census areas
- Arizona
- Arkansas
- California
- Colorado
- Connecticut
- Connecticut councils of governments (recognized as county-equivalents under state and federal law since 2022)[1][2][3]
- Historical Connecticut counties
- Delaware
- Florida
- Georgia
- Hawaii
- Idaho
- Illinois
- Indiana
- Iowa
- Kansas
- Kentucky
- Louisiana parishes
- Maine
- Maryland
- Massachusetts
- Michigan
- Minnesota
- Mississippi
- Missouri
- Montana
- Nebraska
- Nevada
- New Hampshire
- New Jersey
- New Mexico
- New York
- North Carolina
- North Dakota
- Ohio
- Oklahoma
- Oregon
- Pennsylvania
- Rhode Island
- South Carolina
- South Dakota
- Tennessee
- Texas
- Utah
- Vermont
- Virginia
- Washington
- West Virginia
- Wisconsin
- Wyoming
In U.S. territories and federal district
The United States Census Bureau also divides the U.S. territories and the District of Columbia into county-equivalents:
- American Samoa's districts and atolls
- Guam is counted as a single county-equivalent
- Northern Mariana Islands municipalities
- Puerto Rico municipalities
- Each main island of the U.S. Virgin Islands
- Each island of the United States Minor Outlying Islands
- Washington, D.C. is counted as a single county-equivalent
By name
By name origin
By demographics
By geography
References
- ^ "Governor Lamont Announces U.S. Census Bureau Approves Proposal for Connecticut's Planning Regions To Become County Equivalents" (Press release). The Office of Governor Ned Lamont. June 6, 2022. Archived from the original on June 6, 2022. Retrieved July 21, 2022.
- ^ "Regional Planning Organizations RPO". CT.gov - Connecticut's Official State Website. Retrieved November 11, 2023.
- ^ United States Census Bureau (June 6, 2022). "Change to County-Equivalents in the State of Connecticut". Federal Register. Retrieved January 4, 2024.