Richfield, OH has a population of 3,651 and is the 7,850th largest city in the United States. The population density is 391 per sq mi which is 52% higher than the Ohio average and 331% higher than the national average. The median age in Richfield is 48 which is approximately 21% higher than the Ohio average of 39. In Richfield, 67% of the population over 15 years of age are married, 93% speak English and 2% speak Spanish. 79% of Richfield residents were born in Ohio, 17% were born out of state, 0% were born outside of the United States and 3% were foreign born.