Lima, OH has a population of 37,836 and is the 1,098th largest city in the United States. The population density is 2,795 per sq mi which is 985% higher than the Ohio average and 2985% higher than the national average. The median age in Lima is 33 which is approximately 16% lower than the Ohio average of 39. In Lima, 38% of the population over 15 years of age are married, 97% speak English and 1% speak Spanish. 78% of Lima residents were born in Ohio, 21% were born out of state, 0% were born outside of the United States and 1% were foreign born.