The short answer is: not in the way most gardeners mean. There is no widely recognized certification that labels an urban planter box itself as “certified for organic gardening.” Organic certification—such as USDA Organic—generally applies to the production system, the harvested crop, and approved inputs, not to a container as a standalone product. That means you usually won’t find a planter box with an “organic planter” seal equivalent to an organic food label.
That said, you can absolutely garden organically in urban planter boxes. What matters is the whole setup. Choose a box made from materials that are safe for growing food and unlikely to leach prohibited substances. Good options often include untreated cedar or pine, food-grade HDPE plastic, and powder-coated or galvanized metal with a food-safe liner. Avoid CCA-treated lumber, old railroad ties, lead-painted wood, and questionable recycled plastics or tires unless you can verify they are safe and allowed by your certifier.
Look for supporting certifications and listings rather than a planter-box organic certificate. For soil, compost, fertilizers, and pest controls, OMRI Listed products are widely accepted in organic production. FSC-certified wood can be a good environmental choice, and food-contact or food-safe material claims can help with material safety, but neither is the same as organic certification for the planter.
If your goal is to sell or label produce as certified organic, contact a USDA-accredited certifying agent before you build or buy. They can confirm whether your containers, growing media, compost sources, and inputs meet the National Organic Program rules. For most home gardeners, the practical path is simple: use a durable, food-safe planter; fill it with organic-approved potting mix and compost; feed with OMRI Listed inputs; and keep records. There may be brands that market planter boxes as “organic gardening ready,” but treat that as a marketing claim unless it is backed by a specific third-party standard your certifier accepts.