Jasper, IN has a population of 15,790 and is the 2,714th largest city in the United States. The population density is 1,191 per sq mi which is 563% higher than the Indiana average and 1214% higher than the national average. The median age in Jasper is 42 which is approximately 11% higher than the Indiana average of 37. In Jasper, 63% of the population over 15 years of age are married, 92% speak English and 6% speak Spanish. 79% of Jasper residents were born in Indiana, 16% were born out of state, 1% were born outside of the United States and 4% were foreign born.