Half of the United States population resides in 146 very large urban and
suburban counties clustered around the nation's most populous cities.
The remaining 157million Americans are scattered through the country's
3031 smaller counties, boroughs and parishes – many of them rural. The
largest 146 counties range in population from Los Angeles County – with
9.8million people – to Williamson County, Texas, – a bedroom community
for Austin, with 455,000 people.

Half of the United States population resides in 146 very large urban and
suburban counties clustered around the nation's most populous cities.
The remaining 157million Americans are scattered through the country's
3031 smaller counties, boroughs and parishes – many of them rural. The
largest 146 counties range in population from Los Angeles County – with
9.8million people – to Williamson County, Texas, – a bedroom community
for Austin, with 455,000 people.