Topeka, IN has a population of 1,010 and is the 15,086th largest city in the United States. The population density is 607 per sq mi which is 238% higher than the Indiana average and 570% higher than the national average. The median age in Topeka is 24 which is approximately 36% lower than the Indiana average of 37. In Topeka, 49% of the population over 15 years of age are married, 72% speak English and 4% speak Spanish. 72% of Topeka residents were born in Indiana, 23% were born out of state, 1% were born outside of the United States and 4% were foreign born.