
Allen
- County:
- Collin County
- County Seat:
- No
- Area (mi²):
- 26.402
- State:
- Texas
Allen is a city located in Collin County, Texas. Allen has a 2025 population of 115,668. Allen is currently growing at a rate of 1.78% annually and its population has increased by 9.59% since the most recent census, which recorded a population of 105,548 in 2020.
The average household income in Allen is $159,361 with a poverty rate of 4.84%. The median age in Allen is 38.5 years: 38.2 years for males, and 38.8 years for females.