South Zanesville, OH has a population of 2,134 and is the 10,639th largest city in the United States. The population density is 2,576 per sq mi which is 900% higher than the Ohio average and 2743% higher than the national average. The median age in South Zanesville is 35 which is approximately 12% lower than the Ohio average of 39. In South Zanesville, 53% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 88% of South Zanesville residents were born in Ohio, 12% were born out of state, 0% were born outside of the United States and 0% were foreign born.