Port Huron, MI has a population of 29,388 and is the 1,458th largest city in the United States. The population density is 3,627 per sq mi which is 3496% higher than the Michigan average and 3903% higher than the national average. The median age in Port Huron is 37 which is approximately 7% lower than the Michigan average of 40. In Port Huron, 45% of the population over 15 years of age are married, 95% speak English and 2% speak Spanish. 83% of Port Huron residents were born in Michigan, 12% were born out of state, 1% were born outside of the United States and 4% were foreign born.