Mechanicsville, IA has a population of 1,052 and is the 14,840th largest city in the United States. The population density is 1,267 per sq mi which is 2219% higher than the Iowa average and 1298% higher than the national average. The median age in Mechanicsville is 38 which is approximately 1% lower than the Iowa average of 38. In Mechanicsville, 58% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 86% of Mechanicsville residents were born in Iowa, 14% were born out of state, 0% were born outside of the United States and 0% were foreign born.