Pinal County, Arizona

county in Arizona, United States

Pinal County is a county in the central part of the U.S. state of Arizona. As of the 2020 census, the population was 425,264,[2] making it Arizona's third-most populous county. The county seat is Florence. The county was founded in 1875.

Pinal County
Second Pinal County Courthouse in Florence
Second Pinal County Courthouse in Florence
Map of Arizona highlighting Pinal County
Location within the U.S. state of Arizona
Map of the United States highlighting Arizona
Arizona's location within the U.S.
Coordinates: 32°59′13″N 111°19′38″W / 32.98694°N 111.32722°W / 32.98694; -111.32722
Country United States
State Arizona
FoundedFebruary 1, 1875
Named forPinal Peak
Largest municipalitySan Tan Valley
Maricopa (incorporated)[1]
 • Total5,374 sq mi (13,920 km2)
 • Land5,366 sq mi (13,900 km2)
 • Water8.6 sq mi (22 km2)  0.2%
 • Total425,264
 • Density79/sq mi (31/km2)
Time zoneUTC−7 (Mountain)


  1. "Surprising numbers for Pinal cities in census; Maricopa now most populous city". August 13, 2021.
  2. 2.0 2.1 "QuickFacts: Pinal County, Arizona". United States Census Bureau. Retrieved August 8, 2023.