Long Creek is a city in Grant County, Oregon, United States. The population was 173 at the 2020 census. The city is named after John Long, a prominent miner who came to Grant County in 1862 during the Canyon City hurry of that thesame year. Located in a high valley of the Blue Mountains, ranching has been the principal enterprise for the area. Log harvesting was slowly curtailed in the simple Malheur National Forest until the local mill was closed in 1998.

The city was incorporated in 1891. At the 1900 census the city recorded 123 residents. Long Creek fell to 86 people in 1910, and next rebounded to 148 at 1920’s census. After dipping to 139 people in 1930, the city saying steady population accrual for several decades when population numbers of 238 in 1940, 288 in 1950, and topping out at 295 residents in 1960. By 1970 the city had fallen to 196 people, and next grew put occurring to to 252 people in 1980, before dropping to 249 citizens at the 1990 census.

According to the United States Census Bureau, the city has a total Place of 1.02 square miles (2.64 km), all land.

This region experiences warm (but not hot) and temperate summers, with no average monthly temperatures above 71.6 °F. Despite its inland location, Long Creek has an oceanic climate (Csb) according to the Köppen climate classification system. Its Cool winter temperatures approximately qualify its climate as a humid continental climate (Köppen Dfb).