Bensenville, IL has a population of 18,431 and is the 2,364th largest city in the United States. The population density is 3,351 per sq mi which is 1407% higher than the Illinois average and 3599% higher than the national average. The median age in Bensenville is 36 which is approximately 5% lower than the Illinois average of 37. In Bensenville, 56% of the population over 15 years of age are married, 44% speak English and 43% speak Spanish. 57% of Bensenville residents were born in Illinois, 8% were born out of state, 1% were born outside of the United States and 33% were foreign born.