Highland, IN has a population of 23,107 and is the 1,884th largest city in the United States. The population density is 3,322 per sq mi which is 1751% higher than the Indiana average and 3567% higher than the national average. The median age in Highland is 42 which is approximately 13% higher than the Indiana average of 37. In Highland, 57% of the population over 15 years of age are married, 88% speak English and 6% speak Spanish. 63% of Highland residents were born in Indiana, 31% were born out of state, 1% were born outside of the United States and 5% were foreign born.