The former French Catholic diocese of Lombez existed from 1317 to the French Revolution. It was suppressed by the Concordat of 1801, its territory going to the diocese of Bayonne and the archdiocese of Toulouse. Its see was Lombez Cathedral in Gascony.
Coordinates: 43°28′29″N 0°54′37″E / 43.4746°N 0.9103°E