National Register Listings in
Washington County, Idaho

Anderson-Elwell House Baptist Church Butterfield Livestock Company House Cambridge News Office Drake, Col. C. F., House Edwards-Gillette Barn Fisher, James M., House Galloway, Thomas C., House Haas, Bernard, House Haas, Herman, House Institute Canal Company Pump House Intermountain Institute Jewell Building Knights of Pythias Lodge Hall Kurtz-Van Sicklin House Larsen, Archie, House Nesbit, G. V., House Numbers, Dr. J. R., House Salubria Lodge No. 31 Sommer, Morris, House Sommercamp, Mary Elizabeth, House St. Agnes Catholic Church St. Luke's Episcopal Church Star Theater Varian, B. S., House Washington County Courthouse Watlington, Benjamin, House Weiser Oregon Short Line Railroad Depot Weiser Post Office Wilson House
The first known human settlement in Idaho dates back more than 12,000 years. Archaeological evidence shows that early Native American tribes lived in the region, and artifacts from these settlements can be found in museums throughout the state.
Idaho random facts
Washington County, Idaho holds a rich history dating back thousands of years. The region was once inhabited by indigenous Native American tribes, primarily the Nez Perce and Paiute bands, who relied on its fertile land for farming and hunting. European explorers, notably the Lewis and Clark Expedition, visited the area in the early 19th century. However, it wasn't until the mid-1800s that Washington County began to experience significant settlement.

In the 1860s, gold was discovered in the Salmon River, leading to a gold rush in the area. This drew many settlers, and the town of Weiser was established in 1863. The county itself was created by the Idaho Territorial Legislature in 1879 and named after the first President of the United States, George Washington.

Agriculture played a pivotal role in the development of Washington County. The fertile soil and the mild climate made it ideal for cultivating crops such as wheat, fruit orchards, and root vegetables. As the region grew, more towns were established, including Cambridge, Midvale, and Indian Valley.

In the early 20th century, the arrival of the Oregon Short Line Railroad boosted the local economy, facilitating the transportation of agricultural produce and connecting Washington County to wider markets. The railroad also contributed to population growth as it brought more people to the area. Today, Washington County remains agriculture-focused, with farming being the primary industry in the region.

Throughout its history, Washington County has evolved from the ancestral lands of Native American tribes to a thriving agricultural community. Its rich heritage, natural beauty, and strong sense of community continue to shape its identity and make it a significant part of Idaho's history.

This timeline provides a glimpse into the major events and milestones that have shaped the history of Washington County, Idaho.

  • 1805 - Lewis and Clark Expedition pass through the area.
  • 1820s - Fur trappers and traders start to explore the region.
  • 1863 - Washington County is established as one of the original nine counties of Idaho Territory.
  • 1879 - The town of Weiser is founded as a railroad town.
  • 1892 - The Idaho Northern Railroad reaches Cambridge, promoting further settlement in the area.
  • 1917 - The Brundage Ski Resort is established in the mountains of Washington County.
  • 1941 - The Cambridge Air Field is built to train pilots during World War II.
  • 1951 - The Brownlee Dam on the Snake River is completed, providing hydroelectric power and flood control.
  • 1975 - The Weiser River Trail is converted from a former railroad line into a popular recreational trail.
  • 1995 - Washington County Historical Society is established to preserve and promote the history of the county.
  • 2019 - The population of Washington County reaches approximately 10,000 people.