Granton, WI has a population of 352 and is the 21,584th largest city in the United States. The population density is 653 per sq mi which is 647% higher than the Wisconsin average and 621% higher than the national average. The median age in Granton is 40 which is approximately 3% higher than the Wisconsin average of 39. In Granton, 50% of the population over 15 years of age are married, 98% speak English and 0% speak Spanish. 83% of Granton residents were born in Wisconsin, 17% were born out of state, 0% were born outside of the United States and 0% were foreign born.