Muskego, WI has a population of 24,650 and is the 1,766th largest city in the United States. The population density is 780 per sq mi which is 792% higher than the Wisconsin average and 761% higher than the national average. The median age in Muskego is 44 which is approximately 12% higher than the Wisconsin average of 39. In Muskego, 69% of the population over 15 years of age are married, 97% speak English and 2% speak Spanish. 86% of Muskego residents were born in Wisconsin, 11% were born out of state, 0% were born outside of the United States and 2% were foreign born.