Lexington-Fayette, KY has a population of 311,529 and is the 61st largest city in the United States. The population density is 1,098 per sq mi which is 913% higher than the Kentucky average and 1112% higher than the national average. The median age in Lexington-Fayette is 34 which is approximately 12% lower than the Kentucky average of 39. In Lexington-Fayette, 48% of the population over 15 years of age are married, 88% speak English and 6% speak Spanish. 59% of Lexington-Fayette residents were born in Kentucky, 31% were born out of state, 1% were born outside of the United States and 9% were foreign born.