Trödelmarkt St. Vith is an annual flea market organized by the Fördergemeinschaft St. Vith VoG in the town centre of St. Vith, Belgium. Held on the first Friday in August, the event transforms around five kilometres of streets into a lively marketplace, with free admission for visitors. Since its first edition in 1998, the market has grown from about 40 stalls to 1,750 in 2025, attracting around 10,000 visitors and participants from across four countries.

The market focuses exclusively on second-hand goods and treasured finds, including antiques, vintage items, books and records. Local food and drink businesses are represented along the route, adding to the experience as visitors browse the stalls and explore the town centre. The organizers provide information for exhibitors and offer stall reservations, with participation for vendors listed as free. Places can be in high demand: all 1,750 stalls for 2025 were taken in less than two days. The website shares event updates, historical information, practical details and social media content in German, Dutch and French.