Langley is a town in Mayes County, Oklahoma, United States. The population was 819 at the 2010 census.Langley is located at 36°28′8″N 95°2′59″W / 36.46889°N 95.04972°W / 36.46889; -95.04972.According to the United States Census Bureau, the town has a total area of 1.2 square miles, all of it land.As of 2010 the population of Langley was 819. The racial and ethnic composition of the population was 69.8% white, 0.7% African American, 21.0% Native American, 0.9% Asian, 0.1% Pacific Islander, 0.9% from some other race and 6.6% from two or more races. 3.7% of the population was Hispanic or Latino of any race.As of the census of 2000, there were 669 people, 274 households, and 187 families residing in the town. The population density was 542.5 people per square mile. There were 360 housing units at an average density of 291.9 per square mile. The racial makeup of the town was 67.41% White, 0.45% African American, 20.03% Native American, 0.30% Asian, 2.24% from other races, and 9.