SAGIENSIS (Sées - Orne)Created in the fifth century.
SANCTI FLORI (Saint-Flour - Cantal)Created on the 22 February 1318 by dividing the See of Clermont.
SANCTI PAPULI (Saint-Papoul - Aude)Created on the 22 February 1317 by dividing the See of Toulouse.
SARLATENSIS (Sarlat - Drôme)Created on the 13 August 1317 by dividing the See of Périgueux.
SENECENSIS (Senez - Alpes-de-Haute-Provence)Created towards the end of the fourth century, united in the fifth with Castellane and Thorame. Possibly abandoned at the end of the sixth century, but mentioned at the end of the tenth century.
SENONENSIS (Sens - Yonne)Attested in the fourth century.
SILVANECTENSIS (Senlis - Oise)Attested in the fourth century
SISTARICENSIS (Sisteron - Alpes-de-Hautes-Provence)Attested in the sixth century.
SUESSIONENSIS (Soissons - Aisne)Mentioned in the fourth century.