Outdoor Lighting in St. Clair County, IL (2026)
3 rules for unincorporated St. Clair County, Illinois.
Verified from official government sources
Dark Sky Rules
Every outdoor light fixture on non-residential and multi-family property inside the Airport Overlay AO-1 District, the zone ringing Scott Air Force Base and MidAmerica St. Louis Airport, must be fully shielded and pointed downward under Zoning Code Sec. 40-4-120(A)(1). No light may show above the horizontal as measured at the fixture itself, and the shielding must stay effective for the life of the fixture.
Dark-Sky Lighting Rules in St. Clair County, IL
Some RestrictionsSt. Clair County Zoning Ordinance Sec. 40-4-120(A)(1)
40-4-120 LIGHTING. The following standards shall apply to all lands within the AO-1 District, unless otherwise stated. (A) Non-Residential Uses and Multi-Family Residential. (1) The light source of outdoor lighting fixtures shall be fully shielded and downward facing so as not to allow any light above the horizontal, as measured at the luminaire. ... (4) All light fixtures that are required to ...
Light Trespass & Shielding
Outdoor lighting on non-residential and multi-family property inside the Airport Overlay AO-1 District, around Scott Air Force Base and MidAmerica St. Louis Airport, must be placed so it does not cause excessive glare or light trespass under Zoning Code Sec. 40-4-120(A)(2). Parking lots there need non-reflective paving, canopy lights must stay hidden, and sign lighting must aim downward.
Light Trespass Rules in St. Clair County, IL
Some RestrictionsSt. Clair County Zoning Ordinance Sec. 40-4-120(A)(2)
40-4-120 LIGHTING. ... (A) Non-Residential Uses and Multi-Family Residential. ... (2) Outdoor lighting fixtures shall be placed so as to not cause excessive glare or light trespass. (3) On-site parking areas shall be constructed of asphalt, dyed concrete or other non-reflective paving surfaces. ... (5) Canopy lighting shall be designed to conceal the illumination source and the lighting fixture...
Billboard Lighting
In unincorporated St. Clair County, a sign within 75 feet of a residential zoning district cannot be illuminated at all. Every illuminated sign elsewhere must hold still and stay shielded: flashing, intermittent, or moving lights are banned outright except narrow public-service displays, and any glare aimed at a road or interstate is its own violation.
Billboard Lighting Rules in Unincorporated St. Clair County
Some RestrictionsSt. Clair County Zoning Code § 40-7-2(J)
(J) Lighting. (1) No sign located nearer than seventy-five (75) feet to a residential zoning district shall be illuminated. (2) No sign may be erected which contains, includes, or is illuminated by any flashing, intermittent or moving light(s), except those giving public service information such as, without limiting the generality of the foregoing, time, weather, date, and temperature. (3) No s...
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