Each vanity will have its own weight limit. However, most vanities have a range of around 200-220 pounds, while those made of solid wood could hold up to 300 pounds or more. This depends on the cabinet itself, how it is installed, and other factors. Make sure that the cabinet itself and the counter are factored into the weight limit and don’t let children sit on the vanity, for several reasons, including that it could be a safety risk related to the weight limit.