Transilien Paris – Nord is one of the sectors in the Paris Transilien suburban rail network. The trains on this sector depart from Gare du Nord in central Paris, as well as from Pontoise station in the suburbs. Transilien services from Paris – Nord are part of the SNCF Gare du Nord rail network. There are two groups of Transilien lines in the Nord sector, marked "H" and "K".
Service consists of the following lines:
Gare du Nord - Pontoise
Gare du Nord - Persan-Beaumont (western line via Ermont-Eaubonne)
Gare du Nord - Persan-Beaumont (eastern line via Montsoult-Maffliers)