Mechanicsville, VA has a population of 37,201 and is the 1,116th largest city in the United States. The population density is 1,312 per sq mi which is 586% higher than the Virginia average and 1348% higher than the national average. The median age in Mechanicsville is 42 which is approximately 10% higher than the Virginia average of 38. In Mechanicsville, 64% of the population over 15 years of age are married, 96% speak English and 2% speak Spanish. 67% of Mechanicsville residents were born in Virginia, 29% were born out of state, 1% were born outside of the United States and 3% were foreign born.