Whitefish Bay, WI has a population of 14,088 and is the 2,978th largest city in the United States. The population density is 6,661 per sq mi which is 7519% higher than the Wisconsin average and 7253% higher than the national average. The median age in Whitefish Bay is 40 which is approximately 3% higher than the Wisconsin average of 39. In Whitefish Bay, 70% of the population over 15 years of age are married, 90% speak English and 2% speak Spanish. 60% of Whitefish Bay residents were born in Wisconsin, 31% were born out of state, 1% were born outside of the United States and 9% were foreign born.