Dallas County Flag

Dallas County

State:
Iowa
County Seat:
Adel

Dallas County's estimated 2026 population is 122,843 with a growth rate of 3.15% in the past year according to the most recent United States census data. Dallas County is the 6th largest county in Iowa. The 2010 population was 66,751 and has seen a growth of 84.03% since that time.

122,843
Total Population
209
Population Density (mi²)
6
Population Rank (State)
3.8K 3.15%
Annual Population Growth

Dallas County Population

Demographics

Economics and Income Statistics