Cities and Towns in Fremont County, Idaho
Founded in 1893, Fremont County is one of 44 counties in the state of Idaho. Historically, Fremont County was formed from Bingham County. The city of Saint Anthony is the county seat. With FIPS code of 43, Fremont County has a population of 13,592 and area of 1,867 square miles (4,836 km²).
List of all cities in Fremont County, ID alphabetically
| City/Town | Postal Code | Area Code |
| Anthony, ID | 83445 | 208 |
| Ashton, ID | 83420 | 208 |
| Big Springs, ID | 83433 | 208 |
| Box Canyon, ID | 83429 | 208 |
| Canyon Creek, ID | 83436 | 208 |
| Chester, ID | 83421 | 208 |
| Clementsville, ID | 83436 | 208 |
| Drummond, ID | 83420 | 208 |
| Egin, ID | 83445 | 208 |
| Heman, ID | 83445 | 208 |
| Island Park, ID | 83429 | 208 |
| 83433 | 208 | |
| Lamont, ID | 83420 | 208 |
| Last Chance Resort, ID | 83429 | 208 |
| Macks Inn, ID | 83433 | 208 |
| Marysville, ID | 83420 | 208 |
| Newdale, ID | 83436 | 208 |
| Parker, ID | 83438 | 208 |
| Ponds Resort, ID | 83429 | 208 |
| Saint Anthony, ID | 83445 | 208 |
| Teton, ID | 83451 | 208 |
| Twin Groves, ID | 83445 | 208 |
| Warm River, ID | 83420 | 208 |
| Wilford, ID | 83445 | 208 |
Major Cities and Towns in Fremont County, Idaho
St. Anthony
Area and Population
- Area: 2.29 square miles
- Population: Approximately 3,400
- Zip Codes: 83445
- Latitude: 43.9658° N
- Longitude: 111.6822° W
Location and History
St. Anthony is the largest city and the county seat of Fremont County, Idaho. Located in the Upper Snake River Valley, St. Anthony was established in 1890 and named after Saint Anthony of Padua. The city developed quickly due to its location along the Henry’s Fork of the Snake River, which provided water for irrigation and transportation. The arrival of the railroad in the early 20th century further spurred growth, making St. Anthony a regional hub for agriculture and trade. The city’s economy has traditionally been based on farming, with potatoes, grains, and livestock being the primary products. Today, St. Anthony is known for its scenic surroundings, including the nearby sand dunes and mountains, which attract outdoor enthusiasts year-round.
Major Schools and Landmarks
St. Anthony is served by the Fremont County Joint School District, with South Fremont High School and St. Anthony Elementary School as key educational institutions. The city is home to several notable landmarks, including the St. Anthony Sand Dunes, a popular destination for off-road vehicle enthusiasts, camping, and hiking. The nearby Henry’s Fork of the Snake River offers excellent fishing and rafting opportunities. Another significant landmark is the historic Fremont County Courthouse, which reflects the city’s early 20th-century architecture and serves as a symbol of the community’s long-standing role as the county seat.
Ashton
Area and Population
- Area: 0.86 square miles
- Population: Approximately 1,127
- Zip Codes: 83420
- Latitude: 44.0730° N
- Longitude: 111.4477° W
Location and History
Ashton is a small city located in northern Fremont County, Idaho, near the Teton Mountain Range. The town was established in 1906 as a railroad terminus for the Union Pacific Railroad, which played a crucial role in its early development. Ashton quickly became a hub for agriculture, particularly in the production of potatoes, grains, and seed crops, thanks to the rich volcanic soil of the region. The city’s location also made it a gateway to Yellowstone National Park, further boosting its significance as a transportation and trade center. Today, Ashton maintains its agricultural roots while serving as a base for tourists visiting nearby national parks and forests.
Major Schools and Landmarks
Ashton is part of the Fremont County Joint School District, with North Fremont High School and Ashton Elementary School serving the local population. The city is known for its access to outdoor recreation, including fishing, hunting, and snowmobiling in the nearby Targhee National Forest. Notable landmarks include the historic Ashton Opera House, which has been restored and now serves as a community center, and the Mesa Falls Scenic Byway, a picturesque route that takes visitors to the stunning Upper and Lower Mesa Falls on the Henry’s Fork River. Ashton’s location and natural beauty make it a charming destination for both residents and visitors.
Island Park
Area and Population
- Area: 10.41 square miles
- Population: Approximately 300
- Zip Codes: 83429
- Latitude: 44.5007° N
- Longitude: 111.3377° W
Location and History
Island Park is a unique city in Fremont County, Idaho, known for having the longest “main street” in the United States, stretching over 33 miles along U.S. Highway 20. The city was incorporated in 1947 to circumvent Idaho’s liquor laws, allowing establishments along the highway to serve alcohol. Island Park is located in a region known for its stunning natural beauty, with the Targhee National Forest and Yellowstone National Park nearby. The city is a popular destination for outdoor enthusiasts, offering activities such as fishing, hiking, and snowmobiling. Island Park’s history is closely tied to its location as a gateway to some of the most famous wilderness areas in the country.
Major Schools and Landmarks
Island Park is served by the Fremont County Joint School District, with students typically attending schools in nearby Ashton or St. Anthony. The city is known for its proximity to significant landmarks, including the Island Park Reservoir, a popular spot for boating, fishing, and camping. Another major attraction is the Henry’s Fork of the Snake River, renowned for its world-class fly fishing. The historic Big Springs, a large natural spring that feeds the river, is also located in Island Park and is a popular site for wildlife viewing and picnicking. The city’s unique character and natural surroundings make it a favored destination for both residents and visitors.
Teton
Area and Population
- Area: 0.24 square miles
- Population: Approximately 750
- Zip Codes: 83451
- Latitude: 43.8877° N
- Longitude: 111.6738° W
Location and History
Teton is a small town located in the southern part of Fremont County, Idaho. The town was established in the late 19th century by Mormon settlers who were drawn to the area’s fertile soil and abundant water supply from the nearby Teton River. Teton developed as an agricultural community, with farming and livestock raising as the primary economic activities. The town has remained small and rural, offering a quiet lifestyle with a strong sense of community. Teton’s location in the Upper Snake River Valley provides a picturesque setting, with views of the nearby Teton Range and easy access to outdoor recreation.
Major Schools and Landmarks
Teton is part of the Fremont County Joint School District, with students attending schools in nearby St. Anthony or Ashton. The town is known for its agricultural heritage and its peaceful rural setting. Notable landmarks in Teton include the historic Teton Dam site, located nearby, which is now a popular spot for hiking and exploring the area’s history. The surrounding farmland and the Teton River offer opportunities for fishing, birdwatching, and enjoying the natural beauty of the region. Teton’s small size and close-knit community make it a welcoming place for those who appreciate a quiet, rural lifestyle.
