Franklin County
Also known as Franklin County, Washington, Franklin County, WA
county in the state of Washington, United States
Key facts
- Country
- United States
- State
- Washington
- Founded
- November 28, 1883
- Named after
- Benjamin Franklin
- Seat
- Pasco
- Largest city
- Pasco
- Sheriff
- Marcus Conner
- Total
- 1,264.959 sq mi (3,276.23 km )
- Land
- 1,241.596 sq mi (3,215.72 km )
- Water
- 23.363 sq mi (60.51 km ) 1.85%
- Estimate 2025
- 102,612
- Density
- 77.923/sq mi (30.086/km )
- Time zone
~6 min read
Article
Franklin County is a county located in the U.S. state of Washington. As of the 2020 census, its population was 96,749, and was estimated to be 102,612 in 2025. The county seat and largest city is Pasco.
The county was formed out of Whitman County on November 28, 1883, and is named for Benjamin Franklin.