<page_title> List of the most populous counties in the United States </page_title> <section_title> List </section_title> <table> <cell> 3 <col_header> Rank </col_header> </cell> <cell> Harris <col_header> County </col_header> </cell> <cell> Texas <col_header> State </col_header> </cell> <cell> 4,092,459 <col_header> April 1, 2010 census </col_header> </cell> </table>
As of the 2010 Census, the population of Harris county was 4,092,459, making it the most populous county in Texas and the third most populous county in the United States.