A new lawsuit claims that Facebook Inc. overstates the potential reach of its advertisements to boost ad sales and the prices it can charge.

The class action complaint filed Wednesday by a plaintiffs team led by Cohen Milstein Sellers & Toll in the Northern District of California claims that based on publicly available research and the plaintiffs’ analysis, Facebook’s estimated reach among the key 18- to 34-year-old demographic exceeds the actual population of 18- to 34-year-olds in every state in the U.S.