
Preston
- County:
- Franklin County
- County Seat:
- Yes
- Area (mi²):
- 6.828
- State:
- Idaho
Preston is a city located in Franklin County, Idaho. Preston has a 2025 population of 6,434. It is also the county seat of Franklin County. Preston is currently growing at a rate of 2.57% annually and its population has increased by 14.3% since the most recent census, which recorded a population of 5,629 in 2020.
The average household income in Preston is $78,123 with a poverty rate of 14.05%. The median age in Preston is 34.5 years: 32.4 years for males, and 36.4 years for females.