Ranking of US Counties By Population in 2015
Updated on July 26, 2024.
Based on the US Census Vintage data estimates, in 2015, the Population for the United States was 320.74M. Among all US counties, Los Angeles County had the highest population (10.08M), followed by Cook County (5.24M), and Harris County (4.56M).
On the other hand, Kalawao County had the lowest population (88) followed by Loving County (119), and King County (280).
The chart below shows the top 10 counties with high population, and the table below shows the ranking of the top 200 US counties.
You can see similar ranking information for related topics. You can also see links at the bottom of the page for the ranking of counties for each state.
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Related Topics: US Census Vintage Data Topic List.
Data Source: US Census Bureau (Vintage).
See this for other years:
Ranking of US Counties By Population in 2015
Rank | County | Population |
|---|---|---|
| 1 | Los Angeles County, CA | 10,077,263 |
| 2 | Cook County, IL | 5,243,371 |
| 3 | Harris County, TX | 4,556,559 |
| 4 | Maricopa County, AZ | 4,174,423 |
| 5 | San Diego County, CA | 3,280,825 |
| 6 | Orange County, CA | 3,148,952 |
| 7 | Miami-Dade County, FL | 2,659,549 |
| 8 | Kings County, NY | 2,608,797 |
| 9 | Dallas County, TX | 2,557,615 |
| 10 | Riverside County, CA | 2,344,648 |
| 11 | Queens County, NY | 2,305,252 |
| 12 | King County, WA | 2,127,372 |
| 13 | San Bernardino County, CA | 2,114,352 |
| 14 | Clark County, NV | 2,097,832 |
| 15 | Tarrant County, TX | 1,985,664 |
| 16 | Santa Clara County, CA | 1,915,736 |
| 17 | Bexar County, TX | 1,894,811 |
| 18 | Broward County, FL | 1,885,435 |
| 19 | Wayne County, MI | 1,764,866 |
| 20 | New York County, NY | 1,637,327 |
| 21 | Alameda County, CA | 1,634,326 |
| 22 | Middlesex County, MA | 1,586,107 |
| 23 | Philadelphia County, PA | 1,571,679 |
| 24 | Sacramento County, CA | 1,493,547 |
| 25 | Suffolk County, NY | 1,491,997 |
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Ranking of Counties By Population in 2015 for each US State
Use the following links to see the ranking of counties by population for each of the following US states.