Cities and Towns in Jefferson County, Idaho
Founded in 1913, Jefferson County is one of 44 counties in the state of Idaho. Historically, Jefferson County was formed from Fremont County. The city of Rigby is the county seat. With FIPS code of 51, Jefferson County has a population of 32,202 and area of 1,095 square miles (2,836 km²).
List of all cities in Jefferson County, ID alphabetically
| City/Town | Postal Code | Area Code |
| Annis, ID | 83442 | 208 |
| Hamer, ID | 83425 | 208 |
| Heise, ID | 83443 | 208 |
| Labelle, ID | 83442 | 208 |
| Lewisville, ID | 83431 | 208 |
| Lorenzo, ID | 83442 | 208 |
| Menan, ID | 83434 | 208 |
| Monteview, ID | 83435 | 208 |
| Mud Lake, ID | 83450 | 208 |
| Rigby, ID | 83442 | 208 |
| Ririe, ID | 83443 | 208 |
| Roberts, ID | 83444 | 208 |
| Terreton, ID | 83450 | 208 |
Major Cities and Towns in Jefferson County, Idaho
Rigby
Area, Population, Zip Codes, Latitude and Longitude
- Area: 2.83 square miles
- Population: 4,814 (approx.)
- Zip Codes: 83442
- Latitude: 43.6724° N
- Longitude: 111.9141° W
City Location and History
Rigby is the county seat and largest city in Jefferson County, located in southeastern Idaho, approximately 15 miles north of Idaho Falls. The city was founded in 1883 by members of The Church of Jesus Christ of Latter-day Saints (LDS Church) who were drawn to the area by the promise of fertile land and ample water from the Snake River Plain. Named after William F. Rigby, an early settler and prominent leader in the community, Rigby developed quickly as an agricultural hub, with its economy centered on farming and dairy production. The introduction of irrigation systems further boosted agricultural output, making Rigby a key player in Idaho’s agricultural industry. The city is also notable for being the birthplace of Philo T. Farnsworth, the inventor of electronic television, which adds to its historical significance.
Major Schools and Landmarks
Rigby is served by the Jefferson School District, with Rigby High School, Rigby Middle School, and several elementary schools providing education to the local population. Significant landmarks in Rigby include the Farnsworth TV and Pioneer Museum, which honors Philo T. Farnsworth and showcases local history, including artifacts from the early settlement period. The Rigby Lake, also known as Jefferson County Lake, is a popular recreational spot for swimming, fishing, and picnicking. The city hosts various community events throughout the year, including the annual Rigby Stampede Days, which features parades, rodeos, and family-friendly activities, celebrating the city’s rich agricultural heritage and close-knit community spirit.
Menan
Area, Population, Zip Codes, Latitude and Longitude
- Area: 2.15 square miles
- Population: 826 (approx.)
- Zip Codes: 83434
- Latitude: 43.7333° N
- Longitude: 111.9944° W
City Location and History
Menan is a small town located in the southwestern part of Jefferson County, near the Snake River. The town was established in 1879 by members of the LDS Church who were among the first settlers to cultivate the fertile land of the Snake River Plain. Menan was named after the Menan Buttes, two volcanic domes that rise prominently near the town and are among the world’s largest tuff cones. The town’s early economy was based on agriculture, with farming and livestock playing central roles in its development. Menan has maintained its rural character and continues to be a close-knit agricultural community, with a strong emphasis on family and tradition.
Major Schools and Landmarks
Menan is part of the Jefferson School District, and students typically attend Rigby High School and other schools in nearby communities. Key landmarks in Menan include the Menan Buttes, which offer unique hiking opportunities and provide panoramic views of the surrounding landscape. The Buttes are also of geological interest due to their volcanic origins. The town celebrates its heritage with the annual Menan Fourth of July celebration, which includes a parade, fireworks, and other community events that bring together residents and visitors. The nearby Snake River provides additional recreational opportunities, including fishing, boating, and bird watching, making Menan a peaceful yet vibrant rural community.
Roberts
Area, Population, Zip Codes, Latitude and Longitude
- Area: 0.26 square miles
- Population: 612 (approx.)
- Zip Codes: 83444
- Latitude: 43.7194° N
- Longitude: 112.1281° W
City Location and History
Roberts is a small town located in eastern Jefferson County, near the Snake River. The town was founded in the late 19th century as a railroad stop along the Oregon Short Line Railroad. Originally named “Dry Creek,” the town was later renamed Roberts after Thomas Roberts, a railroad official. Roberts grew as an agricultural community, with its economy based on farming, particularly the cultivation of potatoes and grain. The town’s location near the Snake River provided water for irrigation, which was crucial for its agricultural development. Although small, Roberts has remained a tight-knit community with a strong connection to its agricultural roots.
Major Schools and Landmarks
Roberts is served by the Jefferson School District, with students typically attending schools in nearby Rigby, such as Rigby High School. Key landmarks in Roberts include the historic Roberts Community Church, which has been a focal point for the town’s residents since its construction. The nearby Market Lake Wildlife Management Area is a significant natural landmark, offering opportunities for bird watching, fishing, and exploring the wetlands. The town also hosts community events such as the annual Roberts Pioneer Days, which celebrate the town’s history and bring together residents for parades, games, and other festivities, reflecting the town’s strong sense of community and its agricultural heritage.
Lewisville
Area, Population, Zip Codes, Latitude and Longitude
- Area: 0.29 square miles
- Population: 523 (approx.)
- Zip Codes: 83431
- Latitude: 43.6928° N
- Longitude: 112.0119° W
City Location and History
Lewisville is a small town located in southern Jefferson County, about 10 miles northwest of Idaho Falls. The town was established in the 1880s by settlers from the LDS Church who were drawn to the area by the promise of fertile farmland. Named after Lewis Clark, an early settler, Lewisville quickly developed as an agricultural community, with its economy based on farming and livestock. The town grew steadily, supported by the development of irrigation systems that allowed for the cultivation of a wide variety of crops. Although it remains a small, rural community, Lewisville has retained its historical character and strong sense of tradition.
Major Schools and Landmarks
Lewisville is part of the Jefferson School District, and students typically attend Rigby High School and other schools in the district. The town’s key landmarks include the historic Lewisville Church, which has been a central part of the community since the late 19th century. The surrounding farmland offers a picturesque rural landscape, ideal for those who appreciate a quiet, country lifestyle. Lewisville hosts various community events throughout the year, including the annual Harvest Festival, which celebrates the town’s agricultural heritage with parades, local produce, and family-friendly activities. The town’s close-knit community and rich history make it a charming place to live and visit.
Ririe (partially in Jefferson County)
Area, Population, Zip Codes, Latitude and Longitude
- Area: 0.71 square miles
- Population: 656 (approx.)
- Zip Codes: 83443
- Latitude: 43.6294° N
- Longitude: 111.7736° W
City Location and History
Ririe is a small town located on the border of Jefferson and Bonneville counties, in southeastern Idaho. The town was founded in 1914 and was named after David Ririe, a local farmer who donated land for the townsite. Ririe developed as an agricultural community, with its economy focused on farming and livestock, particularly dairy production. The town’s location near the Snake River and access to irrigation made it an ideal spot for agriculture. Over the years, Ririe has remained a small, rural town, with a strong sense of community and a connection to its agricultural roots.
Major Schools and Landmarks
Ririe is served by the Ririe School District, which includes Ririe High School and Ririe Elementary School. Key landmarks in Ririe include the nearby Heise Hot Springs, a popular local attraction offering natural hot springs, swimming pools, and camping facilities. The town is also close to the South Fork of the Snake River, which provides excellent opportunities for fishing, boating, and outdoor recreation. The surrounding mountains offer additional activities such as hiking, skiing, and snowmobiling. Ririe hosts various community events, including the annual Ririe Days celebration, which features parades, games, and local entertainment, reflecting the town’s strong community spirit and agricultural heritage.
