Mount Blanchard, OH has a population of 478 and is the 19,815th largest city in the United States. The population density is 889 per sq mi which is 245% higher than the Ohio average and 881% higher than the national average. The median age in Mount Blanchard is 36 which is approximately 8% lower than the Ohio average of 39. In Mount Blanchard, 60% of the population over 15 years of age are married, 97% speak English and 1% speak Spanish. 88% of Mount Blanchard residents were born in Ohio, 12% were born out of state, 0% were born outside of the United States and 0% were foreign born.