Condon is a city in, and the chair of, Gilliam County, in the U.S. state of Oregon. The population was 682 at the 2010 census. The city, with an historic main street along Oregon Route 19, is a cultivation and ranching community. The John Day River/Cottonwood Canyon State Park, the ghost town of Lonerock and the John Day Fossil Beds are anything a curt drive from Historic Condon.

Condon was the southern terminus of the Condon Branch of the Union Pacific Railroad. In 1883, a local homesteader named Potter platted the land on the subject of a spring upon his property. The spring, which emerged from a bed of black basalt, was known to trailblazer ranchers in the Place as Summit Springs. Experiencing financial difficulty, Potter surrendered the site to the legal firm Condon and Cornish from Arlington. Harvey C. Condon, a devotee of the firm, was a nephew of Oregon geologist Thomas Condon. Condon and Cornish sold lots in the townsite and in 1884, resident David B. Trimble applied for a name office and became its first postmaster. He named the declare office Condon after Harvey C. Condon.

Condon Air Force Station was a radar station near the city that operated from 1951 to 1970.

In 1998, Condon’s historic downtown core along Main Street was listed on the National Register of Historic Places as the Condon Commercial Historic District. The City of Condon has collaborated with matter interests to modernize buildings on Main Street. Most of the buildings on the Historic Main Street have been restored, new businesses have opened, and the Gilliam County Library moved to the remodeled Hollen and Sons Hardware Store, the City Park has been re-designed into a beautiful concern space.