Elkhorn, WI has a population of 9,931 and is the 3,953rd largest city in the United States. The population density is 1,236 per sq mi which is 1313% higher than the Wisconsin average and 1264% higher than the national average. The median age in Elkhorn is 37 which is approximately 5% lower than the Wisconsin average of 39. In Elkhorn, 58% of the population over 15 years of age are married, 93% speak English and 4% speak Spanish. 63% of Elkhorn residents were born in Wisconsin, 30% were born out of state, 1% were born outside of the United States and 5% were foreign born.