McKinney
- County:
- Collin County
- County Seat:
- Yes
- Area (mi²):
- 68.69
- State:
- Texas
McKinney is a city located in Collin County, Texas. McKinney has a 2026 population of 227,526. It is also the county seat of Collin County. McKinney is currently growing at a rate of 5.4% annually and its population has increased by 15.2% since the most recent census, which recorded a population of 197,510 in 2020.