Great question—yes, many suppliers do sell replacement slats for city street benches, but it depends on the bench manufacturer and the material. If one slat is cracked, warped, or vandalized, you usually do not need to replace the entire bench. Here is what I would recommend based on how these benches are typically built.
First, check the underside of the bench or the end caps for a manufacturer name or model number. Brands like Maglin, DuMor, Keystone Ridge Designs, and Landscape Forms often sell individual replacement slats through their parts departments. If you cannot find a brand, measure the broken slat carefully: length, width, thickness, and the center-to-center distance between mounting holes. Most city street benches use either 2x4 or 2x6 lumber slats, but some use aluminum, recycled plastic, or coated steel.
For wood slats, you can often buy kiln-dried hardwood like ipe, teak, or oak from a local lumberyard and cut it to size. Just make sure you use stainless steel or tamper-resistant hardware to match the original. For recycled plastic or metal slats, it is usually better to go back to the original manufacturer or a specialized park and site furnishing supplier. These are often pre-drilled and powder-coated, so matching the color and hole pattern matters.
A practical tip: take a photo of the broken slat next to a tape measure and send it to a supplier. Most commercial bench part vendors can identify the profile and quote you a single replacement slat without requiring a bulk order. Expect to pay anywhere from $25 to $80 per slat depending on material and length, plus shipping.
If you are maintaining a public bench, I also suggest ordering one or two extra slats at the same time. City street benches take a lot of abuse, and having a spare on hand saves you weeks of downtime later. And if the bench is under warranty, contact the manufacturer first—some will send a free replacement slat even if it was damaged by weather or normal wear.
In short, yes, replacement slats are available for most city street benches. Identify the material, measure accurately, and reach out to either the original maker or a park furniture parts supplier. You will have that bench back in service faster than you think.