New Haven, MI has a population of 4,686 and is the 6,748th largest city in the United States. The population density is 1,853 per sq mi which is 1737% higher than the Michigan average and 1945% higher than the national average. The median age in New Haven is 30 which is approximately 25% lower than the Michigan average of 40. In New Haven, 58% of the population over 15 years of age are married, 98% speak English and 0% speak Spanish. 86% of New Haven residents were born in Michigan, 11% were born out of state, 3% were born outside of the United States and 1% were foreign born.