Cedarburg, WI has a population of 11,516 and is the 3,532nd largest city in the United States. The population density is 2,383 per sq mi which is 2107% higher than the Wisconsin average and 2530% higher than the national average. The median age in Cedarburg is 43 which is approximately 10% higher than the Wisconsin average of 39. In Cedarburg, 65% of the population over 15 years of age are married, 94% speak English and 2% speak Spanish. 67% of Cedarburg residents were born in Wisconsin, 28% were born out of state, 0% were born outside of the United States and 5% were foreign born.