Garnier de Rochefort (died ) was a French churchman who was successively abbot of (1175–1180), abbot of Clairvaux (1186–1193) and Bishop of Langres (1193–1199).

Garnier was descended from a noble family of Rochefort-sur-Brévon. He first became a monk at the . In 1180, he became the prior, then in 1186 abbot, of Clairvaux.L'abbé Roussel, Le diocèse de Langres : histoire et statistique, 1875.L'abbé Matthieu, Abrégé chronologique de l'histoire des Évêques de Langres, 1844. In 1193, on the death of , he was elected bishop of Langres. Charged in Rome with profligate overspending by , he was suspended by Pope Innocent III. He then made a pilgrimage to the Holy Land. On his return, he resigned and retired to Clairvaux until his death, which likely occurred in 1225 (though certain 19th-century historians say 1200).

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