Mansfield, OH has a population of 46,902 and is the 880th largest city in the United States. The population density is 1,520 per sq mi which is 490% higher than the Ohio average and 1578% higher than the national average. The median age in Mansfield is 38 which is approximately 4% lower than the Ohio average of 39. In Mansfield, 47% of the population over 15 years of age are married, 96% speak English and 2% speak Spanish. 78% of Mansfield residents were born in Ohio, 20% were born out of state, 0% were born outside of the United States and 2% were foreign born.