New Baden, IL has a population of 3,358 and is the 8,252nd largest city in the United States. The population density is 1,840 per sq mi which is 728% higher than the Illinois average and 1931% higher than the national average. The median age in New Baden is 34 which is approximately 10% lower than the Illinois average of 37. In New Baden, 63% of the population over 15 years of age are married, 97% speak English and 2% speak Spanish. 63% of New Baden residents were born in Illinois, 31% were born out of state, 4% were born outside of the United States and 2% were foreign born.