Altona, IN has a population of 226 and is the 23,903rd largest city in the United States. The population density is 1,113 per sq mi which is 520% higher than the Indiana average and 1128% higher than the national average. The median age in Altona is 39 which is approximately 3% higher than the Indiana average of 37. In Altona, 51% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 83% of Altona residents were born in Indiana, 15% were born out of state, 2% were born outside of the United States and 0% were foreign born.