Champagne-sur-Oise is a railway station in the commune of Champagne-sur-Oise, France. The station is served by the Transilien H on two of its branches: Creil↔Persan-Beaumont↔Pontoise and Paris Nord↔Ermont Eaubonne↔Persan-Beaumont. In 2019, the station's estimated annual passengers is 342,276.