Greenview, IL has a population of 844 and is the 16,236th largest city in the United States. The population density is 992 per sq mi which is 346% higher than the Illinois average and 995% higher than the national average. The median age in Greenview is 37 which is approximately 2% lower than the Illinois average of 37. In Greenview, 57% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 88% of Greenview residents were born in Illinois, 12% were born out of state, 0% were born outside of the United States and 0% were foreign born.