Windfall City, IN has a population of 962 and is the 15,404th largest city in the United States. The population density is 3,278 per sq mi which is 1726% higher than the Indiana average and 3519% higher than the national average. The median age in Windfall City is 34 which is approximately 8% lower than the Indiana average of 37. In Windfall City, 60% of the population over 15 years of age are married, 94% speak English and 5% speak Spanish. 77% of Windfall City residents were born in Indiana, 22% were born out of state, 1% were born outside of the United States and 1% were foreign born.