Cairo is located in Alexander County. The region is located on the body of water Mississippi River. About 1,733 people live here (as of 2020). Between 2010 and 2020, the population declined from 2,831 to 1,733. The region is at 96 meters above sea level. The area covers about 23.5 square kilometers. There are about 273 streets in Cairo. The region was founded in 1818. The postal codes are 62914. The dialing code is 618. Cairo is city in Illinois, United States. Among other things, Cairo has restaurants, schools, banks and hairdressers. More information at
www.ci.quincy.il.us.