Mount Pleasant, OH has a population of 512 and is the 19,391st largest city in the United States. The population density is 2,009 per sq mi which is 680% higher than the Ohio average and 2117% higher than the national average. The median age in Mount Pleasant is 40 which is approximately 2% higher than the Ohio average of 39. In Mount Pleasant, 60% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 55% of Mount Pleasant residents were born in Ohio, 44% were born out of state, 0% were born outside of the United States and 1% were foreign born.