Illinois entered the Union in 1818 as the 21st State.
Illinois adopted its flag in 1915, modified in 1970. The central design is from the State seal and shows national symbols plus dates of Statehood (1818) and the seal itself (1868).
Illinois state flags, flag decals, and Illinois state deal decals are available from FlagLine.com.
For more U.S. history, see our e-book "The History of the USA."
For more local history, see the Chicago History Info Guide.
Note: Our information on U.S. state flags is based on primary source materials from the Federal Consumer Information Center.
