United States

Maps of the US

Population

The most populous counties in the U.S. mapped

According to the U.S. Census Bureau Los Angeles County (California) is the most populous county in the country, with a total population of more than 10 million. Cook County in Chicago follows (~5 million residents). In Texas, Harris County, Maricopa County in Arizona, and San Diego County and Orange County in California have populations above 3 million. In the U.S. there are 45 counties with a population of more than 1 million.

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