Preston is a city in Franklin County, Idaho, United States. The population was 5,204 at the 2010 census. The city is the county seat of Franklin County. It is part of the Logan, Utah-Idaho Metropolitan Statistical Area.
The Bear River Massacre occurred in 1863 at a point a few miles northwest of Preston. The Bear River Massacre Site is a National Historic Landmark.
In 1866, Latter-day Saint (LDS, or Mormon) pioneers arrived in the northern end of the Cache Valley, stretching across southeastern Idaho and northeastern Utah. They founded a community in that location and named it Worm Creek, but in 1881 changed it to Preston because leaders of the LDS Church in Salt Lake City objected to the name "Worm Creek" being part of any church congregation's name. The name Preston was suggested by a local member to honor William B. Preston, who at the time was president of the LDS Church's Cache Stake.
It was not until the 1880s while William C. Parkinson was serving as the bishop of the Preston LDS Ward that a regular townsite was laid out.
For several years the city held a "Napoleon Dynamite Festival" in the summer. Many of the featured festival themes related to events occurring during the film.