Bethany, IL has a population of 1,275 and is the 13,662nd largest city in the United States. The population density is 1,319 per sq mi which is 494% higher than the Illinois average and 1356% higher than the national average. The median age in Bethany is 40 which is approximately 6% higher than the Illinois average of 37. In Bethany, 62% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 85% of Bethany residents were born in Illinois, 13% were born out of state, 2% were born outside of the United States and 1% were foreign born.