Sign Regulations in St. Louis County, MO (2026)
4 county-level rules, plus city-specific rules for 1 city in St. Louis County, Missouri.
Verified from official government sources
Political Signs
St. Louis County Code §1003.168 allows political campaign signs for candidates seeking office and other pertinent data, capped at eight square feet for any one sign and sixteen square feet total for each lot or unit. The signs must be erected only on private property and must be removed within seven days after the election they were made for.
Political Campaign Sign Rules
Some RestrictionsSt. Louis County Code §1003.168
Sec. 1003.168. — Political campaign signs for the candidates seeking political office and other pertinent data. The maximum area for any one (1) sign is eight (8) square feet, with a total area of sixteen (16) square feet permitted for each lot or unit. These signs must be erected only on private property and be removed within seven (7) days after the election for which they were made.
Garage Sale Signs
Garage and yard sale signs are prohibited in the public right-of-way under SLCRO §1003.168 and §710.010. Signs may only be placed on private property with the owner's permission. Real-estate signs are also limited to the property being sold.
Garage Sale Signs
Heavy RestrictionsSt. Louis County Code §710.010 / §1003.168
Sec. 710.010. — Prohibited, Where. … Signs for garage sales are prohibited from being placed in a public right-of-way.
Holiday Displays
St. Louis County's zoning lighting rules exempt temporary decorative seasonal lighting entirely, including its ban on flickering or flashing fixtures.
Holiday Lights Exempt From Code
Few RestrictionsSection 1003.169
4. Lighting exemptions. The following types of lighting are exempt from the requirements of this section. ... (5) Temporary decorative seasonal lighting; ... 6. General lighting standards. ... (1) No flickering or flashing lights shall be permitted, except for temporary decorative seasonal lighting.
Digital Billboards
St. Louis County has no separate digital-billboard category: LED and static advertising signs share the same 800-square-foot, 35-foot-high cap under Section 1003.168B, spaced at least 1,400 feet apart, and permitted only in "C-8," "M-3," and "MXD" planned districts.
St. Louis County Digital Billboard Rules
Significant RestrictionsSLCRO § 1003.168B, subsec. 3(2)
Advertising signs shall not exceed eight hundred (800) square feet in outline area, nor extend more than thirty-five (35) feet above the elevation of the adjacent street. An advertising sign shall not be located closer than one thousand four hundred (1,400) feet on the same side of the highway as any other advertising sign or building to which an advertising sign is attached, nor within fifty (...
Sign Regulations by City in St. Louis County
1 cities in St. Louis County have their own sign regulations rules. Each link goes to that city's dedicated page with code citations.
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