Gratiot, WI has a population of 229 and is the 23,849th largest city in the United States. The population density is 417 per sq mi which is 377% higher than the Wisconsin average and 360% higher than the national average. The median age in Gratiot is 42 which is approximately 7% higher than the Wisconsin average of 39. In Gratiot, 54% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 88% of Gratiot residents were born in Wisconsin, 12% were born out of state, 0% were born outside of the United States and 0% were foreign born.