Custer, MI has a population of 269 and is the 23,028th largest city in the United States. The population density is 271 per sq mi which is 168% higher than the Michigan average and 199% higher than the national average. The median age in Custer is 41 which is approximately 4% higher than the Michigan average of 40. In Custer, 65% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 95% of Custer residents were born in Michigan, 5% were born out of state, 0% were born outside of the United States and 0% were foreign born.