Franklin County Flag

Franklin County

State:
Washington
County Seat:
Pasco

Franklin County's estimated 2026 population is 104,606 with a growth rate of 1.64% in the past year according to the most recent United States census data. Franklin County is the 14th largest county in Washington. The 2010 population was 79,076 and has seen a growth of 32.29% since that time.

104,606
Total Population
84
Population Density (mi²)
14
Population Rank (State)
1.7K 1.64%
Annual Population Growth

Franklin County Population

Demographics

Economics and Income Statistics