Fairfax is a town in Osage County, Oklahoma, United States.

[5] When the Santa Fe Railway chose to go up Salt Creek valley and bypassed the village of Gray Horse (which continues to exist today as the home of one of the Osage tribe's three major historic bands) the present day town of Fairfax was created.

Wismeyer rejected the name Coda proposed by the railroad and convinced them to call the depot Fairfax after a hotel he had stayed at in Washington, D.C.

[6] The murders occurred following the discovery of oil on the Osage Nation Reservation (coterminous with the county).

[5] According to the United States Census Bureau, the town has a total area of 0.8 square miles (2.1 km2), all land.

33.5% of all households were made up of individuals, and 17.8% had someone living alone who was 65 years of age or older.

[10] David Grann wrote Killers of the Flower Moon, a book about the Osage Indian murders and the FBI’s involvement in solving them.