St. Clair County, IL Public Conduct: Public Alcohol Use (2026)

Section 21-3-10 of the St. Clair County Liquor Code, titled "Unlawful Acts," makes it illegal for anyone in unincorporated St. Clair County to drink alcoholic liquor on any public street, alley, sidewalk, or other public way without special permission from the county Liquor Commission. The same section separately bars drinking in any public park except with permission of the County Board, so a park permit and a street-drinking permit run through two different bodies. The code also prohibits appearing intoxicated on a public street, alley, sidewalk, or other public place, including parks and recreation areas.

Drinking on private property is likewise unlawful unless the property owner has given permission, closing off the obvious workaround of stepping off the sidewalk onto a yard. The county cross-references 235 ILCS 5/6-16, the state Liquor Control Act's provision on furnishing liquor to minors and intoxicated persons, tying the local rule to the state framework rather than standing alone. Because this is a county liquor ordinance, it applies only in unincorporated St. Clair County; Belleville, O'Fallon, Fairview Heights, Swansea, Cahokia Heights, Mascoutah and East St.

Louis each enforce their own municipal codes on open containers within city limits. Requests to drink at a permitted public event in a county park go to the County Board rather than the Sheriff's office, and the same board can authorize street-side consumption for organized functions such as fairs or festivals held on county rights-of-way.