Hendrix, OK has a population of 68 and is the 27,707th largest city in the United States. The population density is 566 per sq mi which is 937% higher than the Oklahoma average and 525% higher than the national average. The median age in Hendrix is 37 which is approximately 1% higher than the Oklahoma average of 36. In Hendrix, 57% of the population over 15 years of age are married, 84% speak English and 0% speak Spanish. 49% of Hendrix residents were born in Oklahoma, 51% were born out of state, 0% were born outside of the United States and 0% were foreign born.