Templeton, IA has a population of 384 and is the 21,098th largest city in the United States. The population density is 899 per sq mi which is 1545% higher than the Iowa average and 892% higher than the national average. The median age in Templeton is 41 which is approximately 7% higher than the Iowa average of 38. In Templeton, 67% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 94% of Templeton residents were born in Iowa, 5% were born out of state, 1% were born outside of the United States and 0% were foreign born.