Pasco, Washington

Pasco
Pasco City Hall
Interactive location map of Pasco
Coordinates: 46°14′19″N 119°07′31″W / 46.23861°N 119.12528°W / 46.23861; -119.12528
CountryUnited States
StateWashington
CountyFranklin
Founded1891
IncorporatedSeptember 3, 1891
Government
 • TypeCouncil–manager
 • MayorPete Serrano
 • City managerAdam Lincoln
Area
 • City
37.50 sq mi (97.13 km2)
 • Land33.96 sq mi (87.95 km2)
 • Water3.54 sq mi (9.18 km2)
Elevation
390 ft (120 m)
Population
 (2020)
 • City
77,108
 • Estimate 
(2024)
81,724
 • RankUS: 454th
WA: 17th
 • Density2,221.4/sq mi (857.67/km2)
 • Urban
255,401 (US: 157th)
 • Metro
311,469 (US: 165th)
 • CSA
370,975 (US: 103rd)
 • Tri-Cities
226,886
Time zoneUTC-8 (Pacific)
 • Summer (DST)UTC-7 (PDT)
ZIP codes
99301, 99302
Area code509
FIPS code53-53545
GNIS feature ID2411381
Websitepasco-wa.gov

Pasco (/ˈpæsk/ PAS-koh) is a city in and the county seat of Franklin County, Washington, United States. The population was 77,108 at the 2020 census, and estimated at 81,724 in 2024. Pasco is one of three cities (the others being Kennewick and Richland) that make up Washington state's Tri-Cities region, a mid-sized metropolitan area of approximately 303,622 people.