Douglass Hills, KY has a population of 5,645 and is the 5,984th largest city in the United States. The population density is 4,258 per sq mi which is 3828% higher than the Kentucky average and 4599% higher than the national average. The median age in Douglass Hills is 38 which is approximately 2% lower than the Kentucky average of 39. In Douglass Hills, 63% of the population over 15 years of age are married, 87% speak English and 3% speak Spanish. 55% of Douglass Hills residents were born in Kentucky, 33% were born out of state, 1% were born outside of the United States and 11% were foreign born.