Collin County Flag

Collin County

State:
Texas
County Seat:
McKinney

Collin County's estimated 2026 population is 1,348,046 with a growth rate of 3.59% in the past year according to the most recent United States census data. Collin County is the 6th largest county in Texas. The 2010 population was 787,102 and has seen a growth of 71.27% since that time.

1,348,046
Total Population
1,603
Population Density (mi²)
6
Population Rank (State)
46.7K 3.59%
Annual Population Growth

Collin County Population

Demographics

Economics and Income Statistics