Valmondois is a railway station located in the commune of Butry-sur-Oise (Val-d'Oise department), France.

The station is served by Transilien H trains Creil - Pontoise and Paris - Saint-Leu-la-Forêt - Persan-Beaumont.

[1] Valmondois is located on the original Paris - Lille line, opened on 20 June 1846 by Compagnie des chemins de fer du Nord (Nord Railway Company).

This line passed along the Montmorency Valley (Ermont-Eaubonne), and headed towards the Northeast at Saint-Ouen-l'Aumône, continuing through the Oise valley.

The Ermont-Eaubonne - Valmondois branch line via Saint-Leu-la-Forêt was opened in 1876.