Heath, OH has a population of 10,471 and is the 3,814th largest city in the United States. The population density is 976 per sq mi which is 279% higher than the Ohio average and 978% higher than the national average. The median age in Heath is 39 which is approximately equal to the Ohio average of 39. In Heath, 58% of the population over 15 years of age are married, 97% speak English and 0% speak Spanish. 79% of Heath residents were born in Ohio, 19% were born out of state, 0% were born outside of the United States and 2% were foreign born.