Momence, IL has a population of 3,071 and is the 8,693rd largest city in the United States. The population density is 1,957 per sq mi which is 781% higher than the Illinois average and 2060% higher than the national average. The median age in Momence is 38 which is approximately 2% higher than the Illinois average of 37. In Momence, 53% of the population over 15 years of age are married, 91% speak English and 9% speak Spanish. 76% of Momence residents were born in Illinois, 17% were born out of state, 1% were born outside of the United States and 7% were foreign born.