TER Occitanie or liO Train is the regional rail network serving the region of Occitanie, southern France.

It is operated by the French national railway company SNCF.

It was formed in 2017 from the previous TER networks TER Languedoc-Roussillon and TER Midi-Pyrénées, after the respective regions were merged.

The rail and bus network as of May 2022:[1][2] Narbonne – Lézignan-Corbières – Carcassonne – Bram – Castelnaudary – Avignonet† – Villefranche-de-Lauragais – Villenouvelle† – Baziège – Montlaur† – Escalquens† – Labège-Village† – Labège-Innopole – Montaudran† – Toulouse-Matabiau Narbonne - Coursan - Béziers - Vias - Agde - Marseillan-Plage - Sète - Frontignan - Vic-Mireval - Villeneuve-lès-Maguelone - Montpellier-Saint-Roch - Saint-Aunès - Baillargues - Valergues-Lansargues - Lunel-Viel - Lunel – Gallargues – Vergèze-Codognan – Uchaud – Milhaud – Saint-Césaire – Nîmes-Centre – Nîmes-Pont-du-Gard – Beaucaire – Tarascon – Avignon-Centre Portbou – Cerbère – Perpignan – Narbonne – Béziers – Agde – Sète – Frontignan – Montpellier-Saint-Roch – Lunel – Nîmes – Nîmes-Pont-du-Gard – Tarascon – Avignon-Centre Villefranche–Vernet-les-Bains ... Perpignan Nîmes – Saint-Césaire – Générac – Beauvoisin – Vauvert – Le Cailar – Aimargues – Saint-Laurent-d'Aigouze – Aigues-Mortes – Le Grau-du-Roi branch line: Mende ... La Bastide–Saint-Laurent-les-Bains Latour-de-Carol-Enveitg – Enveitg-Village-Béna-Fanès – Ur-Les Escaldes – Bourg-Madame – Osséja – Sainte-Léocadie – Err – Saillagouse – Estavar – Font-Romeu-Odeillo-Via – Bolquère-Eyne – Mont-Louis-La Cabanasse – Planès – Sauto – Fontpédrouse-Saint-Thomas-les-Bains – Thuès-Carança – Thuès-les-Bains – Nyer – Olette-Canaveilles-les-Bains – Joncet – Serdinya – Villefranche–Vernet-les-Bains