Leesburg, IN has a population of 720 and is the 17,290th largest city in the United States. The population density is 2,765 per sq mi which is 1440% higher than the Indiana average and 2952% higher than the national average. The median age in Leesburg is 35 which is approximately 6% lower than the Indiana average of 37. In Leesburg, 75% of the population over 15 years of age are married, 95% speak English and 4% speak Spanish. 77% of Leesburg residents were born in Indiana, 20% were born out of state, 0% were born outside of the United States and 2% were foreign born.