Sign Regulations in St. Clair County, IL (2026)
4 rules for unincorporated St. Clair County, Illinois.
Verified from official government sources
Political Signs
The county Zoning Ordinance has no separate political-sign category. Campaign signs fall under temporary signs, limited to 48 sq ft, and a temporary sign cannot stay up more than 30 days (extendable once by 30 days). No sign may be within 10 feet of a lot line. City limits set
Political Signs in Unincorporated St. Clair County
Some RestrictionsSt. Clair County Zoning Ordinance Sec. 40-7-3(I)(3)
Term of Permit. Temporary signs shall not remain in place for a period of more than thirty (30) days except that the zoning official may extend the time period for an additional thirty (30) days.
Garage Sale Signs
The Zoning Ordinance has no garage-sale sign category; such signs would be temporary signs (max 48 sq ft, 30-day display) and cannot sit within 10 feet of a lot line or in the public right-of-way. Garage sales themselves need a county permit and are capped at two per year.
Garage Sale Signs in St. Clair County
Some RestrictionsSt. Clair County Zoning Ordinance Sec. 40-5-7
Garage/yard sales shall be limited to no more than two (2) per calendar year. A permit shall be required prior to holding such yard sales.
Digital Billboards
St. Clair County bans flashing, intermittent or moving-light signs anywhere in the unincorporated county under Zoning Code Sec. 40-7-2(J), a rule that reaches digital billboards and electronic message boards. The only exception is public-service displays showing time, weather, date or temperature. Signs also can't be illuminated within 75 feet of a residential district, and blinding glare toward drivers is separately banned.
Digital Billboard Rules in St. Clair County, IL
Significant RestrictionsSt. Clair County Zoning Code Sec. 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...
Freeway-Facing Signs
Advertising signs and billboards facing a highway in unincorporated St. Clair County must sit at least 1.5 miles from any city limit, 200 feet from a building, and 500 feet from the next billboard or from an interchange, rest area, or weigh station. County and township roads are off-limits to them entirely.
Billboards Along Highways in St. Clair County
Some RestrictionsSt. Clair County Zoning Code § 40-7-4(A)(2)
(2) Location of Signs. (a) All advertising/billboard signs located along any roadway shall not be less than one and one-half (1.5) miles from the nearest corporate limits of any municipality. (b) Advertising/billboard signs shall not be located nearer than two hundred (200) feet to any building or structure. (c) Along all public roads and highways, advertising signs on the same side of the high...
All St. Clair County ordinances
See every category we cover for St. Clair County: parking, noise, fences, fires, animals, pools, and more.
St. Clair County Ordinance Hub →