Deckerville, MI has a population of 862 and is the 16,097th largest city in the United States. The population density is 691 per sq mi which is 585% higher than the Michigan average and 663% higher than the national average. The median age in Deckerville is 42 which is approximately 7% higher than the Michigan average of 40. In Deckerville, 57% of the population over 15 years of age are married, 96% speak English and 3% speak Spanish. 92% of Deckerville residents were born in Michigan, 6% were born out of state, 0% were born outside of the United States and 3% were foreign born.