Greenville, MI has a population of 8,429 and is the 4,499th largest city in the United States. The population density is 1,329 per sq mi which is 1218% higher than the Michigan average and 1367% higher than the national average. The median age in Greenville is 34 which is approximately 14% lower than the Michigan average of 40. In Greenville, 53% of the population over 15 years of age are married, 98% speak English and 1% speak Spanish. 85% of Greenville residents were born in Michigan, 14% were born out of state, 0% were born outside of the United States and 1% were foreign born.