Pasco
- County:
- Franklin County
- County Seat:
- Yes
- Area (mi²):
- 38.963
- State:
- Washington
Pasco is a city located in Franklin County, Washington. Pasco has a 2026 population of 81,724. It is also the county seat of Franklin County. Pasco is currently growing at a rate of 1.72% annually and its population has increased by 5.2% since the most recent census, which recorded a population of 77,686 in 2020.