Bellevue, IL has a population of 1,650 and is the 12,138th largest city in the United States. The population density is 741 per sq mi which is 233% higher than the Illinois average and 718% higher than the national average. The median age in Bellevue is 43 which is approximately 15% higher than the Illinois average of 37. In Bellevue, 56% of the population over 15 years of age are married, 95% speak English and 0% speak Spanish. 80% of Bellevue residents were born in Illinois, 15% were born out of state, 0% were born outside of the United States and 5% were foreign born.