Cities and Towns in Gilliam County, Oregon
Founded in 1885, Gilliam County is one of 36 counties in the state of Oregon. Historically, Gilliam County was formed from Eastern third of Wasco County. The city of Condon is the county seat. With FIPS code of 21, Gilliam County has a population of 2,005 and area of 1,204 square miles (3,118 km²).
List of all cities in Gilliam County, OR alphabetically
| City/Town | Postal Code | Area Code |
| Arlington, OR | 97812 | 541 |
| 97861 | 541 | |
| Condon, OR | 97823 | 541 |
| Mikkalo, OR | 97861 | 541 |
Major Cities and Towns in Gilliam County, Oregon
Condon
Overview
Condon, the county seat of Gilliam County, is located in north-central Oregon, approximately 70 miles southeast of The Dalles. Established in the late 19th century, the city was originally known as Summit Springs. In 1884, the post office was named Condon after Harvey C. Condon, a local attorney and nephew of geologist Thomas Condon. The city’s early economy was driven by agriculture, particularly wheat farming, benefiting from the fertile lands of the Columbia Plateau. Incorporated in 1893, Condon became the permanent county seat in 1890, following a series of elections. Over the years, the city has maintained its agricultural roots while embracing tourism, offering visitors a glimpse into its rich history and scenic landscapes.
- Area: Approximately 0.83 square miles
- Population: Around 711 residents
- ZIP Code: 97823
- Latitude: 45.2343° N
- Longitude: 120.1884° W
Education and Landmarks
Condon is served by the Condon School District, which includes Condon Elementary School and Condon High School, both known for their commitment to academic excellence and community involvement. A notable landmark in the city is the Gilliam County Historical Museum, which features several restored buildings with furnished period interiors, including an 1884 homestead, a 1905 railroad depot, and a 1900 country schoolhouse. The museum offers insights into the lives of early pioneers and the region’s development. Additionally, the Condon Commercial Historic District, listed on the National Register of Historic Places, showcases the city’s historic main street with preserved buildings reflecting its rich heritage.
Arlington
Overview
Arlington is a city located along the Columbia River in northern Gilliam County. Founded in 1881 and originally named Alkali, it was renamed Arlington in 1885. The city’s early development was closely tied to its strategic location along the river and the construction of the Oregon Railway and Navigation Company’s line, which facilitated transportation and trade. Arlington served as a vital shipping point for agricultural products, particularly wheat, from the surrounding areas. Over time, the city has evolved, balancing its agricultural heritage with modern developments, including renewable energy projects.
- Area: Approximately 2.5 square miles
- Population: Around 883 residents
- ZIP Code: 97812
- Latitude: 45.7154° N
- Longitude: 120.2006° W
Education and Landmarks
Arlington is part of the Arlington School District, which includes Arlington Elementary School and Arlington High School, both dedicated to providing quality education and fostering community engagement. A significant landmark in the city is the Arlington Marina and RV Park, offering recreational opportunities along the Columbia River, including boating, fishing, and camping. The city’s location also provides access to various wind farms in the region, highlighting its role in renewable energy development.
Lonerock
Overview
Lonerock is a small, unincorporated community situated in the southeastern part of Gilliam County. Established in the late 19th century, the town was named after a prominent lone rock that stands near the local church. Lonerock’s history is deeply rooted in agriculture, particularly sheep and cattle ranching, which have been the mainstay of its economy. The town’s remote location and small population have preserved its historic character, offering a glimpse into rural life in Oregon’s past.
- Area: Approximately 0.2 square miles
- Population: Around 21 residents
- ZIP Code: 97823
- Latitude: 45.0918° N
- Longitude: 119.8923° W
Education and Landmarks
Due to its small size, Lonerock does not have its own school and is served by the Condon School District, with students attending schools in nearby Condon. A notable landmark in the community is the historic Lonerock Church, built in 1898, which stands as a testament to the town’s enduring heritage. The surrounding landscapes offer picturesque views of rolling hills and open skies, attracting photographers and history enthusiasts interested in exploring Oregon’s rural communities.
Mikkalo
Overview
Mikkalo is an unincorporated community located in northeastern Gilliam County. Established in the early 20th century, it was named after John Mikkalo, an early settler in the area. The community developed as a small agricultural hub, primarily focusing on wheat farming and livestock. Over time, Mikkalo’s population has remained small, maintaining its rural character amidst the expansive landscapes of the Columbia Plateau.
- Area: Approximately 0.1 square miles
- Population: Around 15 residents
- ZIP Code: 97861
- Latitude: 45.5883° N
- Longitude: 120.2828° W
Education and Landmarks
Mikkalo does not have its own educational institutions and is served by the Arlington School District, with students attending schools in Arlington. The community’s landmarks are primarily agricultural structures, including historic barns and grain elevators that reflect its farming heritage. The surrounding open fields and rural roads offer scenic drives and opportunities for experiencing the tranquility of Oregon’s countryside.
Clem
Overview
Clem is a small, unincorporated community located in central Gilliam County. Established in the late 19th century, the community was named after Clemens Augustus Redding, an early settler and local merchant. Clem served as a modest agricultural center, supporting the surrounding farming and ranching activities. Over the years, the population has dwindled, and today, Clem stands as a quiet reminder of the region’s pioneer history.
