Harris County is a county located in the U.S. state of Texas; as of the 2020 census, the population was 4,731,145, making it the most populous county in Texas and the third most populous county in the United States. Its county seat is Houston, the largest city in Texas and fourth largest city in the United States. The county was founded in 1836 and organized in 1837.
It is named after John Richardson Harris, who founded the town of Harrisburg on Buffalo Bayou in 1826. According to the July 2021 census estimate, Harris County’s population has shifted to 4,728,030 comprising over 16% of Texas’s population. Harris County is included in the nine-county Houston–The Woodlands–Sugar Land metropolitan statistical area, which is the fifth-most populous metropolitan area in the United States.


  • Bellaire
  • Bunker Hill Village
  • Deer Park
  • El Lago
  • Galena Park
  • Hedwig Village
  • Hilshire Village
  • Humble
  • Hunters Creek Village
  • Jacinto City
  • Jersey Village
  • La Porte
  • Morgan’s Point
  • Nassau Bay
  • Pasadena
  • Piney Point Village
  • Shoreacres
  • South Houston
  • Southside Place
  • Spring Valley Village
  • Taylor Lake Village
  • Tomball
  • Webster
  • West University Place


Population Density (Per Sq Mile)

Population Estimate 2022

Total Area in SQ Miles

Land Area in SQ Miles

Water Area in SQ Miles


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P.O. Box 924033, Houston, TX 77292