Wisconsin Rapids, WI has a population of 17,987 and is the 2,408th largest city in the United States. The population density is 1,299 per sq mi which is 1385% higher than the Wisconsin average and 1333% higher than the national average. The median age in Wisconsin Rapids is 42 which is approximately 6% higher than the Wisconsin average of 39. In Wisconsin Rapids, 55% of the population over 15 years of age are married, 94% speak English and 1% speak Spanish. 81% of Wisconsin Rapids residents were born in Wisconsin, 17% were born out of state, 0% were born outside of the United States and 2% were foreign born.