Tri-Lakes, IN has a population of 1,242 and is the 13,833rd largest city in the United States. The population density is 363 per sq mi which is 102% higher than the Indiana average and 301% higher than the national average. The median age in Tri-Lakes is 45 which is approximately 21% higher than the Indiana average of 37. In Tri-Lakes, 71% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 83% of Tri-Lakes residents were born in Indiana, 15% were born out of state, 0% were born outside of the United States and 2% were foreign born.