Antelope is a city in rural Wasco County, Oregon, United States. Antelope had an estimated population of 47 people in 2012. The city was esta…Antelope is a city in rural Wasco County, Oregon, United States. Antelope had an estimated population of 47 people in 2012. The city was established in 1872 at a stage and freight wagon road stop on the old Dalles to Canyon City Trail. It was incorporated as the City of Antelope in 1901.