La Barre – Ormesson is a railway station in the commune of Deuil-la-Barre (Val-d'Oise department), France. The station is served by Transilien H trains, on the lines from Paris to Persan-Beaumont and Pontoise. The daily number of passengers was between 2,500 and 7,500 in 2002.

La Barre-Ormesson is located on the original Paris – Lille line, which was opened on 20 June 1846 by Compagnie des chemins de fer du Nord (North 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. In 1859, a more direct line along Chantilly was opened. The Paris–Pontoise line was electrified in 1969.

The station is served every 15 minutes and eight trains an hour during peak hours. It takes 9 to 15 minutes to reach Paris.

• RATP; 256, 356 and 556

• List of SNCF stations in Île-de-France

• La Barre - Ormesson station at Transilien, the official website of SNCF (in French)