Largest U.S. Counties by Population

Summary: Largest U.S. counties by population

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This database lists the population of U.S. counties as of July 1 in each year from largest to smallest. Data are based on multi-race category estimates from the U.S. Bureau of the Census.  For more information on how these estimates are generated, see Population by Race/Ethnicity and Age Background.


This categorizes each of the counties that make up New York City (Bronx, Kings, New York, Queens, and Richmond) as separate entities or boroughs.  Combined, these five counties would total second to Los Angeles as the largest in the U.S.

Geographic Coverage: Counties

Periodicity: Annually

Series Begins/Ends: 1970/2018

Data Source: Bureau of the Census

Updated:  Jan. 02, 2021 Estimated next update: Jul. 17, 2022

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