Harrodsburg, KY has a population of 8,409 and is the 4,515th largest city in the United States. The population density is 1,215 per sq mi which is 966% higher than the Kentucky average and 1241% higher than the national average. The median age in Harrodsburg is 39 which is approximately 1% higher than the Kentucky average of 39. In Harrodsburg, 57% of the population over 15 years of age are married, 97% speak English and 2% speak Spanish. 79% of Harrodsburg residents were born in Kentucky, 18% were born out of state, 0% were born outside of the United States and 2% were foreign born.