Louis I (c. 1304 – 26 August 1346, ruled 1322–1346) is Count of Flanders, Nevers and Rethel.

He is the son of Louis I, Count of Nevers, and Joan, Countess of Rethel, and grandson of Robert III of Flanders.

He succeeds his father as count of Nevers and his grandfather as count of Flanders in 1322.