The 25 largest counties in the United States in 2017, by population (in millions)

Largest counties in the U.S. 2017 This statistic shows the 25 largest counties in the United States in 2017, by population. In 2017, about 10.16 million people were living in Los Angeles County, California.
Additional information on urbanization in the United States

Urbanization is defined as the process by which cities grow or by which societies become more urban. Rural to urban migration in the United States, and around the world, is often undertaken in the search for employment or to enjoy greater access to services such as healthcare. The largest cities in the United States are steadily growing. Given their size, incremental increases yield considerable numerical gains as seen by New York increasing by 69,777 people in 2011, the most of any city. However in terms of percentage growth, smaller cities outside the main centers are growing the fastest with San Marcos City being the fastest growing large city in 2014.
Urbanization has increased slowly in the United States, rising from 79.76 percent of the population living in urban areas in 2004 to 81.45 percent in 2014. In 2014, the United States ranked 30th in a ranking of countries based on their degree of urbanization. Unlike fully urbanized countries such as Singapore and Hong Kong, the United States maintains a sizeable agricultural industry. Although technological developments have reduced demands for rural labor, labor in the industry and supporting services are still required.
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CountyResident population in million
Los Angeles County, California10.16
Cook County, Illinois5.21
Harris County, Texas4.65
Maricopa County, Arizona4.31
San Diego County, California3.34
Orange County, California3.19
Miami-Dade County, Florida2.75
Kings County, New York2.65
Dallas County, Texas2.62
Riverside County, California2.42
Queens County, New York2.36
Clark County, Nevada2.2
King County, Washington2.19
San Bernardino County, California2.16
Tarrant County, Texas2.05
Bexar County, Texas1.96
Santa Clara County, California1.94
Broward County, Florida1.94
Wayne County, Michigan1.75
New York County, New York1.66
Alameda County, California1.66
Middlesex County, Massachusetts1.6
Philadelphia County, Pennsylvania1.58
Sacramento County, California1.53
Suffolk County, New York1.49
CountyResident population in million
Los Angeles County, California10.16
Cook County, Illinois5.21
Harris County, Texas4.65
Maricopa County, Arizona4.31
San Diego County, California3.34
Orange County, California3.19
Miami-Dade County, Florida2.75
Kings County, New York2.65
Dallas County, Texas2.62
Riverside County, California2.42
Queens County, New York2.36
Clark County, Nevada2.2
King County, Washington2.19
San Bernardino County, California2.16
Tarrant County, Texas2.05
Bexar County, Texas1.96
Santa Clara County, California1.94
Broward County, Florida1.94
Wayne County, Michigan1.75
New York County, New York1.66
Alameda County, California1.66
Middlesex County, Massachusetts1.6
Philadelphia County, Pennsylvania1.58
Sacramento County, California1.53
Suffolk County, New York1.49
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Description Source More information
This statistic shows the 25 largest counties in the United States in 2017, by population. In 2017, about 10.16 million people were living in Los Angeles County, California.
Additional information on urbanization in the United States

Urbanization is defined as the process by which cities grow or by which societies become more urban. Rural to urban migration in the United States, and around the world, is often undertaken in the search for employment or to enjoy greater access to services such as healthcare. The largest cities in the United States are steadily growing. Given their size, incremental increases yield considerable numerical gains as seen by New York increasing by 69,777 people in 2011, the most of any city. However in terms of percentage growth, smaller cities outside the main centers are growing the fastest with San Marcos City being the fastest growing large city in 2014.
Urbanization has increased slowly in the United States, rising from 79.76 percent of the population living in urban areas in 2004 to 81.45 percent in 2014. In 2014, the United States ranked 30th in a ranking of countries based on their degree of urbanization. Unlike fully urbanized countries such as Singapore and Hong Kong, the United States maintains a sizeable agricultural industry. Although technological developments have reduced demands for rural labor, labor in the industry and supporting services are still required.
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Release date
March 2018
Region
United States
Survey time period
2017
Supplementary notes
Population estimates.

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