Big Bay, MI has a population of 138 and is the 25,958th largest city in the United States. The population density is 37 per sq mi which is 64% lower than the Michigan average and 60% lower than the national average. The median age in Big Bay is 60 which is approximately 52% higher than the Michigan average of 40. In Big Bay, 46% of the population over 15 years of age are married, 93% speak English and 0% speak Spanish. 92% of Big Bay residents were born in Michigan, 1% were born out of state, 0% were born outside of the United States and 7% were foreign born.