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Greenhorn, Oregon
Greenhorn in 1913
Greenhorn in 1913
Location in Oregon
Location in Oregon
Country United States
State Oregon
Counties Baker, Grant
Incorporated 1903
 • City 0.1 sq mi (0.3 km2)
 • Land 0.1 sq mi (0.3 km2)
 • Water 0 sq mi (0 km2)
6,306 ft (1,922 m)
 • City 0
 • Density 0/sq mi (0/km2)
 • Urban
 • Metro
Time zone UTC-8 (Pacific)
 • Summer (DST) UTC-7 (Pacific)
ZIP code
Area code(s) 458 and 541
FIPS code 41-31050
GNIS feature ID 1143062

Greenhorn is a non-populated city in Baker and Grant counties in the U.S. state of Oregon. It straddles the Blue Mountain ridge, so that it is located in both Grant County and Baker County. As most of the city is situated in Baker County, and the early residents considered Baker City to be more convenient, for administrative purposes it is considered to be in Baker County.

As of the 2000 census, the city had a total population of 0, with 7 housing units. As of the 2010 census, the population was 0, with 10 housing units.


1903 town site plat

Greenhorn was first populated in the 1860s as miners prospected for gold in the area. It was platted in 1904, though it lost two-thirds of its population between 1900 and 1910. The mining district was composed first of placer mines, but soon many lode gold mines developed. The city was incorporated in 1903. It continued as a viable community until 1942 when gold mining was made illegal by Federal Public Law 208 during World War II.

In later years, the old Greenhorn Jail (dating to around 1910) was removed to Canyon City under suspicious circumstances. A court case ensued for its return, but because the city straddles the Blue Mountain ridge, the district attorneys of Baker County and Grant County could not even agree in which court house it should be held. The case was eventually heard by the Circuit Court for Grant County in Canyon City, Oregon. The jail remains in Canyon City, Oregon.


According to the United States Census Bureau, the city has a total area of 0.1 square miles (0.26 km2), all land.

The city is surrounded by the Malheur National Forest and Wallowa–Whitman National Forest.

At 6,306 feet (1,922 m) above sea level, Greenhorn is the highest incorporated city in Oregon. It is also unique in that the city was established on land that was originally patented from the United States for the purpose of platting the city (rather than being homesteaded by individuals). (See Town of Greenhorn v. Baker County, 596 F2D 349.)

City sign - Greenhorn Oregon


As of the census of 2000, there were no people living in the city. The same was true in 2010. As of 2013, the Baker City Herald reported that Greenhorn had two "year-round" residents. The Herald reported at that time that the community had about 13 cabins and 20 part-time residents.

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