Grand Junction
- County:
- Mesa County
- County Seat:
- Yes
- Area (mi²):
- 40.776
- State:
- Colorado
Grand Junction is a city located in Mesa County, Colorado. Grand Junction has a 2026 population of 70,554. It is also the county seat of Mesa County. Grand Junction is currently growing at a rate of 1.59% annually and its population has increased by 7.29% since the most recent census, which recorded a population of 65,759 in 2020.