Horn Lake, MS has a population of 26,785 and is the 1,611th largest city in the United States. The population density is 1,669 per sq mi which is 2608% higher than the Mississippi average and 1742% higher than the national average. The median age in Horn Lake is 33 which is approximately 10% lower than the Mississippi average of 37. In Horn Lake, 49% of the population over 15 years of age are married, 93% speak English and 5% speak Spanish. 40% of Horn Lake residents were born in Mississippi, 54% were born out of state, 1% were born outside of the United States and 5% were foreign born.