Lexington, OH has a population of 5,484 and is the 6,080th largest city in the United States. The population density is 1,428 per sq mi which is 455% higher than the Ohio average and 1476% higher than the national average. The median age in Lexington is 38 which is approximately 4% lower than the Ohio average of 39. In Lexington, 63% of the population over 15 years of age are married, 98% speak English and 2% speak Spanish. 80% of Lexington residents were born in Ohio, 20% were born out of state, 0% were born outside of the United States and 1% were foreign born.