We, the People of the State of Illinois - grateful to Almighty God for the civil, political and religious liberty which He has permitted us to enjoy and seeking His blessing upon our endeavors - in order to provide for the health, safety and welfare of the people; maintain a representative and orderly government; eliminate poverty and inequality; assure legal, social and economic justice; provide opportunity for the fullest development of the individual; insure domestic tranquility; provide for the common defense; and secure the blessings of freedom and liberty to ourselves and our posterity - do ordain and establish this Constitution for the State of Illinois.
Illinois’ sixth Constitutional Convention convened in Springfield on Dec. 8, 1969. Tne hundred and sixteen members — two elected from each Senatorial District — met at a nonpartisan convention to revise, alter or amend the 1870 Constitution.
After nine months of in-depth study and debate, the members presented their work-product to the people — a Constitution they considered to be workable for 25, 50— or as in the case of the 1870 Constitution — 100 years.
The Constitution was adopted in convention, Sept. 3, 1970; ratified by the people, Dec. 15, 1970; and became effective July 1, 1971. Since its adoption, 10 amendments have been approved and adopted.
Download a copy of the Illinois Constitution.