Hewitt, WI has a population of 792 and is the 16,674th largest city in the United States. The population density is 851 per sq mi which is 873% higher than the Wisconsin average and 839% higher than the national average. The median age in Hewitt is 46 which is approximately 17% higher than the Wisconsin average of 39. In Hewitt, 76% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 86% of Hewitt residents were born in Wisconsin, 12% were born out of state, 1% were born outside of the United States and 2% were foreign born.