Middletown, KY has a population of 7,773 and is the 4,807th largest city in the United States. The population density is 1,514 per sq mi which is 1296% higher than the Kentucky average and 1571% higher than the national average. The median age in Middletown is 45 which is approximately 17% higher than the Kentucky average of 39. In Middletown, 58% of the population over 15 years of age are married, 92% speak English and 3% speak Spanish. 62% of Middletown residents were born in Kentucky, 33% were born out of state, 1% were born outside of the United States and 4% were foreign born.