Caro, MI has a population of 4,112 and is the 7,323rd largest city in the United States. The population density is 1,449 per sq mi which is 714% higher than the Michigan average and 1499% higher than the national average. The median age in Caro is 48 which is approximately 21% higher than the Michigan average of 40. In Caro, 54% of the population over 15 years of age are married, 98% speak English and 1% speak Spanish. 86% of Caro residents were born in Michigan, 11% were born out of state, 1% were born outside of the United States and 2% were foreign born.