The 2017–18 Coupe de France preliminary rounds made up the qualifying competition to decide which teams took part in the main competition from round 7.
The competition was organised by the French Football Federation (FFF) and was open to all clubs in French football, as well as clubs from the overseas departments and territories (Guadeloupe, French Guiana, Martinique, Mayotte, New Caledonia (qualification via 2017 New Caledonia Cup), Tahiti (qualification via 2017 Tahiti Cup), Réunion, and Saint Martin).
[2] Note: Reúnion League structure (no promotion to French League structure):Régionale 1 (R1)Régionale 2 (R2)D2 Départemental (D2D) These matches were played on 13 and 14 October 2017.
[3] Note: French Guiana League structure (no promotion to French League structure):Regional 1 (R1)Regional 2 (R2) These matches were played on 20 and 21 October 2017.
[8] The three sectors in Grand Est region were combined for the sixth round.