Pomona, CA Sign Regulations: Digital Billboards (2026)

Sec. C, Prohibited Signs, lists both digital and off-site advertising signs among the sign types the City won't permit anywhere. Digital Signs are defined broadly as any electronic sign that displays video or multimedia content or text (Sec. 8), a definition that captures LED billboards, video walls and scrolling electronic message boards alike; the section adds that any sign type not listed in Sec. 630 is considered prohibited, so there's no separate exemption elsewhere in the Code for digital display technology. Off-site billboards face an even harder bar.

Sec. 12 defines an off-site advertising sign as any sign structure or billboard built for the purpose of advertising an establishment, product or service which is not available on the property. That ban traces to Proposition L, approved by Pomona voters in a special municipal election on November 2, 1993, which the Code states cannot be modified without a vote of the people. Under Prop L, no new or structurally altered off-site billboards will be permitted within the City of Pomona, though Prop L does preserve room for noncommercial advertising: a property owner, or someone with the owner's consent, may swap in a noncommercial message on any existing on-site advertising sign, whether or not the message relates to the on-site business. Together, the two provisions foreclose any legal path to a new digital billboard in Pomona, whether on-site or off-site.