The Roman Catholic diocese of Lescar, in south-western France, was founded in the fifth century, and continued until 1790. It was originally part of the Province of Novempopulania, and Lescar held the seventh place among the cities. Its see was the Cathedral of the Assumption in Lescar, begun in 1120; the crypt of the cathedral was also the mausoleum of the family of Albret in the 16th century.
The bishopric was suppressed by the Legislative Assembly during the French Revolution , in the Civil Constitution of the Clergy in September 1790, as part of a systematic effort to eliminate redundant bishoprics in France. By the Concordat of 1801, struck by First Consul Napoleon Bonaparte and Pope Pius VII, the diocese of Lescar was not revived, and the territory of the diocese was divided between the diocese of Agen and the diocese of Bayonne.
Coordinates: 43°19′59″N 0°26′02″W / 43.3331°N 0.4339°W