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This article lists the 3,242 counties and county equivalents of the United States.[a] The United States are divided into 3,007 counties, political and geographic subdivisions of a state. 235 other local governments and geographic places are also first-order administrative divisions of their respective state/district/territory, but are called by different names. These are referred to collectively as county equivalents by the United States Census Bureau. The 235 county equivalents include 100 equivalents in the territories (such as those in Puerto Rico), outside the 50 states and the District of Columbia. The large majority of counties and equivalents were organized by 1970. Since that time, most creations, boundary changes and dissolutions have occurred in Alaska and Virginia.
Among the 50 states, 44 are partitioned entirely into counties, with no county equivalents. Louisiana is instead divided into 64 equivalent parishes, while Alaska is divided into 19 equivalent boroughs and 10 sparsely populated census areas, the latter also known collectively as the unorganized borough. Virginia is composed of a mixture of 95 counties and 38 independent cities. Maryland, Missouri and Nevada are each composed entirely of counties, except that each also has exactly one independent city: Baltimore, St. Louis, and Carson City, respectively. The District of Columbia is a single federal district. All of the above 135 exceptional cases are reckoned as county equivalents. The number of counties (or equivalents) per state ranges from the three counties of Delaware, to the 254 counties of Texas. In New England, where the town model predominates, several counties have no corresponding local governments, existing only as historical legal and census boundaries. These are the counties of Connecticut and Rhode Island, as well as 8 of Massachusetts' 14 counties. In all, the 50 states consist of 3,141 counties and equivalents. Adding the District of Columbia gives 3,142.
Similarly, the Census Bureau treats 100 subdivisions of the territories of the United States as county equivalents. These are the 78 municipalities of Puerto Rico, the three major islands of the U.S. Virgin Islands, the three districts and two atolls of American Samoa,[b] Guam as a single island and county equivalent, the four municipalities of the Northern Mariana Islands, and the nine island territories of the U.S. Minor Outlying Islands. As in the states, each territorial county equivalent has its own INCITS/FIPS codes.
- The entity name
- The state or equivalent (federal district or territory)
- The population as of July 1, 2013, as estimated by the United States Census Bureau
- The Core Based Statistical Area if designated by the Office of Management and Budget
- Outline of the United States
- Index of United States-related articles
- Book:United States
- Index of U.S. counties
- Lists of counties in the United States
- List of island counties of the United States
- List of former United States counties
- List of FIPS state codes
- List of United States FIPS codes by county
- The OMB has defined 1098 statistical areas comprising 388 MSAs, 541 μSAs, and 169 CSAs
- At the time of the most recent 2010 census, 3,143 counties and equivalents were recorded in the 50 states and the District of Columbia, with another 100 county equivalents recorded in the territories (when the nine Minor Outlying Islands are included). Since that time, the independent city of Bedford, Virginia was dissolved and had its territory added to Bedford County, Virginia. Also, Alaska's Petersburg census area incorporated as Petersburg Borough, Alaska. The net result of these changes has been the loss of one county equivalent in the grand total.
- Locally, American Samoa is also subdivided into 14 places, which are also called counties. The 14 counties of American Samoa are not regarded as county equivalents by the Census Bureau. Instead, The Bureau treats five places—the three districts and two atolls—as county equivalents.
- Including 100 county equivalents in the U.S. territories.
- One of the 19 organized boroughs of Alaska.
- One of the 10 census areas of the Unorganized Borough of Alaska.
- The Municipality of Anchorage, Alaska has a fully consolidated city and borough government.
- The City and Borough of Juneau, Alaska has a fully consolidated city and borough government.
- Established in 2013, Petersburg Borough is the most recently created county equivalent in the United States. The most recently created county is Broomfield County, Colorado, in 2001.
- The City and Borough of Sitka, Alaska has a fully consolidated city and borough government.
- The City and Borough of Yakutat, Alaska has a fully consolidated city and borough government.
- The City and County of San Francisco, California has a fully consolidated city and county government.
- The City and County of Broomfield, Colorado has a fully consolidated city and county government. Established in 2001, Broomfield is the most recently created county in the United States. The most recently created county equivalent is Petersburg Borough, Alaska, in 2013.
- The City and County of Denver, Colorado has a fully consolidated city and county government.
- Has no functional county government.
- The United States Census Bureau and the Office of Management and Budget treat the District of Columbia as a single county equivalent.
- The City and County of Honolulu, Hawaii has a county government with municipal functions.
- The City of New Orleans and Orleans Parish, Louisiana have a fully consolidated city and parish government.
- The City of Baltimore, Maryland is an independent city exclusive of any county.
- The Town and County of Nantucket, Massachusetts has a fully consolidated town and county government.
- The City of St. Louis, Missouri is an independent city exclusive of any county.
- The Consolidated Municipality of Carson City, Nevada is an independent city exclusive of any county.
- Los Alamos County, New Mexico has a county government with municipal functions.
- The City of Philadelphia and Philadelphia County, Pennsylvania have a fully consolidated city and county government.
- Part of the Minor Outlying Islands. Any recorded population is not permanent, and consists of military or scientific personnel.
- On July 1, 2013, the former independent city of Bedford, Virginia gave up its city charter and became a town within Bedford County. Population estimates are combined totals for the political entities that existed before the merger.
- One of the 38 independent cities of Virginia.
- "2010 Census Geographic Entity Tallies by State and Type". United States Census Bureau.
- "Substantial Changes to Counties and County Equivalent Entities: 1970-Present". United States Census Bureau.
- "An Overview of County Government". National Association of Counties. Archived from the original on April 17, 2013. Retrieved April 25, 2013.
- "Connecticut State Register and Manual, Section VI: Counties". Connecticut Official State Website (Office of Secretary of State).
- "Rhode Island Facts and Figures". Rhode Island Official State Website (Office of Secretary of State).
- "County Government". Massachusetts Official Commonwealth Website (Office of Secretary of Commonwealth).
- Torrieri, Nancy; Davis, James (November 1994). "Geographic Areas Reference Manual" (PDF). United States Department of Commerce, Economics and Statistics Administration, Bureau of the Census. Chapter 4.
- "Territories of United States Minor Outlying Islands". Statoids. Retrieved July 7, 2018.
- "2010 FIPS Codes for Counties and County Equivalent Entities". census.gov. Retrieved July 5, 2018.
- "Annual Estimates of the Resident Population: April 1, 2010 to July 1, 2013". American Factfinder. United States Census Bureau.
- "OMB Bulletin No. 13-01: Revised Delineations of Metropolitan Statistical Areas, Micropolitan Statistical Areas, and Combined Statistical Areas, and Guidance on Uses of the Delineations of These Areas" (PDF). United States Office of Management and Budget. February 28, 2013. Archived from the original (PDF) on March 19, 2013. Retrieved March 22, 2013..
- "American Samoa Infographic" (PDF). Britannica.com. Retrieved July 5, 2018.
- Faulconer, Justin (July 1, 2013). "Bedford reversion to town becomes official today". The News & Advance. Retrieved July 22, 2013.