Munster, IN has a population of 23,103 and is the 1,885th largest city in the United States. The population density is 3,054 per sq mi which is 1601% higher than the Indiana average and 3271% higher than the national average. The median age in Munster is 44 which is approximately 18% higher than the Indiana average of 37. In Munster, 62% of the population over 15 years of age are married, 80% speak English and 9% speak Spanish. 49% of Munster residents were born in Indiana, 40% were born out of state, 1% were born outside of the United States and 10% were foreign born.