County · Mississippi

Harrison County

Harrison County is a county located in the U.S. state of Mississippi. As of the 2020 census, Harrison County is the second-most populous county in Mississippi with a population of 208,621; although the most recent population estimate from 2025 suggests Harrison County has overtaken Hinds County to become the state's most populous county, with a population of 217,136. Its county seats are Biloxi and Gulfport. The county is named after U.S. President William Henry Harrison. Harrison County is part of the Gulfport-Biloxi metropolitan area. The county was severely damaged from both Hurricane Camille on August 17, 1969, and Hurricane Katrina on August 29, 2005, causing catastrophic effects.

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Board of Supervisors Primary
governing council

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Reference data (Census of Governments 2022)

Census ID (PID6): 168569
FIPS state: 28
FIPS county: 047
FIPS place: 99047
Census record name: COUNTY OF HARRISON
Mailing address: PO BOX CC, GULFPORT 39502