Elk City, OK has a population of 12,426 and is the 3,323rd largest city in the United States. The population density is 763 per sq mi which is 1298% higher than the Oklahoma average and 742% higher than the national average. The median age in Elk City is 33 which is approximately 9% lower than the Oklahoma average of 36. In Elk City, 55% of the population over 15 years of age are married, 92% speak English and 7% speak Spanish. 63% of Elk City residents were born in Oklahoma, 34% were born out of state, 1% were born outside of the United States and 2% were foreign born.