Wilburton Number One is a census-designated place (CDP) in Columbia County, Pennsylvania, United States.

Wilburton Number One is located in southern Columbia County at 40°48′48″N 76°23′26″W / 40.81333°N 76.39056°W / 40.81333; -76.39056 (40.813200, -76.390439),[3] on the western end of Conyngham Township.

It is bordered to the west by Mount Carmel Township in Northumberland County, to the south by Midvalley Highway, and to the north and east by the Wilburton Number Two CDP.

According to the United States Census Bureau, the Wilburton Number One CDP has a total area of 0.12 square miles (0.3 km2), all land.

About 2.6% of families and 4.9% of the population were below the poverty line, including 4.3% of those under the age of eighteen and 6.1% of those sixty five or over.