Sign Regulations in Polk County, IA (2026)
4 rules for unincorporated Polk County, Iowa.
Verified from official government sources
Political Signs
Polk County lets temporary political signs go up without a sign permit, but only starting 70 days before the election they relate to, and only if they meet Iowa Code section 68A.406. Placement still has to follow the county's general sign-placement rules.
Political Sign Rules in Unincorporated Polk County
Light RestrictionsPolk County Zoning Ordinance, Art. 11, Div. 1, Sec. 2(E)(7); Div. 2, Sec. 1
(E) Exceptions to Sign Permit. The following signs do not require a sign permit but shall follow the standards as stated and shall observe the requirements of Division 2 of this Article: ... (7) Political Signs. Temporary signs advertising political parties, candidates for election or issues on the ballot, may be erected or displayed and maintained provided they meet the requirements of State C...
Garage Sale Signs
The Zoning Ordinance has no garage-sale-sign-specific rule. Small temporary/portable signs are treated as portable signs (a temporary sign permit, 14-day validity, 32 sq ft max) and may not be placed in the public road right-of-way.
Garage Sale Signs in Unincorporated Polk County
Some RestrictionsPolk County Zoning Ordinance, Art. 11, Div. 4, Sec. 6 (Temporary Signs)
Portable signs and signs for special events and promotions shall require a temporary sign permit issued by the Planning Administrator or a designee... A temporary permit for a portable sign shall be valid for fourteen (14) days... Portable signs shall not exceed thirty-two (32) square feet of area.
Digital Billboards
Polk County allows LED electronic displays on off-site billboards, but only under the standards of Iowa Administrative Code Chapter 117 Outdoor Advertising. On-site electronic message signs, by contrast, are limited to government and school property.
Digital LED Billboard Rules in Polk County
Some RestrictionsPolk County Zoning Ordinance, Art. 11, Div. 4, Sec. 4(A), (D)
Section 4. Electronic Message Signs (A) Electronic Message signs shall only be allowed on site for use by governmental entities including federal, state, county, city and school owned property, as well as indoor institutional uses... (1) The sign and/or sign text shall not scroll, flash, undulate or otherwise move in any manner... (D) Off-site signs (Billboards) shall be permitted light-emittin...
Freeway-Facing Signs
Off-site billboards in unincorporated Polk County are capped at 50 feet of height, must sit outside 100 feet of residential lots, schools and parks, need 1,000 feet of separation from the next billboard, and top out at 300 to 975 square feet depending on zoning district.
Billboard Standards for Roads in Polk County
Some RestrictionsPolk County Zoning Ordinance, Art. 11, Div. 4, Sec. 2
Section 2. Off-site Signs (Billboards) (A) Standards (1) The height of such sign, if free standing, shall not exceed fifty (50) feet above the elevation of the highest road faced by such sign... (4) No such sign shall be permitted which would be located within one hundred (100) feet of (a) any lot in a ER, RR, LDR, MDR, HDR, MU or MH district which either is used for residential purposes or is ...
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