Largest counties in the U.S. 2018

The 25 largest counties in the United States in 2018, by population (in millions)

by Statista Research Department, last edited May 15, 2019
Largest counties in the U.S. 2018 This statistic shows the 25 largest counties in the United States in 2018, by population. In 2018, about 10.11 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 Frisco City being the fastest growing large city from 2016 to 2017.
Urbanization has increased slowly in the United States, rising from 79.76 percent of the population living in urban areas in 2004 to 81.67 percent in 2015. In 2018, the United States ranked 14th 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.
Show more

The 25 largest counties in the United States in 2018, by population (in millions)

Loading statistic...
Expand statistic
CountyResident population in million
Los Angeles County, California 10.11
Cook County, Illinois 5.18
Harris County, Texas 4.7
Maricopa County, Arizona 4.41
San Diego County, California 3.34
Orange County, California 3.19
Miami-Dade County, Florida 2.76
Dallas County, Texas 2.64
Kings County, New York 2.58
Riverside County, California 2.45
Queens County, New York 2.28
King County, Washington 2.23
Clark County, Nevada 2.23
San Bernardino County, California 2.17
Tarrant County, Texas 2.08
Bexar County, Texas 1.99
Broward County, Florida 1.95
Santa Clara County, California 1.94
Wayne County, Michigan 1.75
Alameda County, California 1.67
New York County, New York 1.63
Middlesex County, Massachusetts 1.61
Philadelphia County, Pennsylvania 1.58
Sacramento County, California 1.54
Palm Beach County, Florida 1.49
CountyResident population in million
Los Angeles County, California 10.11
Cook County, Illinois 5.18
Harris County, Texas 4.7
Maricopa County, Arizona 4.41
San Diego County, California 3.34
Orange County, California 3.19
Miami-Dade County, Florida 2.76
Dallas County, Texas 2.64
Kings County, New York 2.58
Riverside County, California 2.45
Queens County, New York 2.28
King County, Washington 2.23
Clark County, Nevada 2.23
San Bernardino County, California 2.17
Tarrant County, Texas 2.08
Bexar County, Texas 1.99
Broward County, Florida 1.95
Santa Clara County, California 1.94
Wayne County, Michigan 1.75
Alameda County, California 1.67
New York County, New York 1.63
Middlesex County, Massachusetts 1.61
Philadelphia County, Pennsylvania 1.58
Sacramento County, California 1.54
Palm Beach County, Florida 1.49
Download Settings Share
Download started
Please be patient - this may take a moment
by Statista Research Department, last edited May 15, 2019
This statistic shows the 25 largest counties in the United States in 2018, by population. In 2018, about 10.11 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 Frisco City being the fastest growing large city from 2016 to 2017.
Urbanization has increased slowly in the United States, rising from 79.76 percent of the population living in urban areas in 2004 to 81.67 percent in 2015. In 2018, the United States ranked 14th 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.
Show more
Statista Accounts: Access All Statistics. Starting from $588 / Year
Basic Account
Get to know the platform

You only have access to basic statistics.

Premium Account
Your perfect start with Statista
  • Instant access to 1m statistics
  • Download in XLS, PDF & PNG format
  • Detailed references

$49 / Month *

Corporate Account
Full access

Corporate solution including all features.

* All products require an annual contract.
   Prices do not include sales tax.
Leading companies trust Statista:
paypalgoogleadobepgsamsungtelekom
Related Studies: Available to Download in PDF or PPTX Format
Demographics of the U.S. Part I
Demographics of the U.S. Part I

All Information
in one Presentation

Demographics of the U.S. Part I

Everything On "Demographics of the U.S. Part I" in One Document: Edited and Divided into Handy Chapters. Including Detailed References.

Statista is a great source of knowledge, and pretty helpful to manage the daily work.
Christof Baron

Christof Baron
CEO, MindShare Germany

Statistics on "Demographics of the U.S. Part I"
  • Population
  • Births, birth rate, infant mortality
  • Deaths, death rate, life expectancy
Discover Statista
Need help with using Statista for your research? Tutorials and first steps
Further Content: Statistics, Studies, and Topic Pages
Learn more about how Statista can support your business.
Do you have any questions about our business solutions?

We provide you with detailed information about our Corporate Account.