1Taillant  
2Taillebourg  
3Talmont-sur-GirondeTamnum,Gallo-Roman port, probably one of the important towns of the Santones. On the cliff stands the church of Saint-Radegonde (from ritus, ford ?). The coast is much changed since the Gallo-Roman period. The port was probably at the head of a small inlet between Barzan and Talmont.
4Tanzac  
5Taugon Former island in the bay of Pictons.
6TernantTaronantos, Taros (Gaulish personal name) + nanto (hollow river valley) 
7Tesson  
8Thaims  
9Thaire  
10ThenacLatin name, Tenus + -acumGallo-Roman cult site at les Arčnes, from Latin arena, sand.
11ThezacTauriac, Latin name, Torius + -acum 
12Thors  
13ThouTolSpring
14Tonnay-Boutonne  
15Tonnay-CharenteTonnacum, Tonnus (Gallo-Roman personal name) + -acumTonnus his place. River port on the Charente.
16TorxeTauricacum, from Tauricius (Gallo-Roman personal name) + -acumTauricius his place
17TouchesTosca, hedge, bushes 
18Touches-de-PerignyTosca, hedge, bushes 
19ToulonTol, springRoman camp
20Treize-Oeufs (les)Gaulish Trez , sand, bankSalt block workings in the marshes. The name may derive from a word found only in the Bas Poitou and Brittany.
21TrembladeLatin, tremulusAspen clearing
22Trizay  
23Tugeras-Saint-Maurice