C-口粮（C-ration）是一种罐装预制的湿式口粮。C-口粮最早是由美国陆军提出，用以当新鲜食物A-口粮和包装好的非熟食B-口粮难以取得或条件过于恶劣使战地厨房无法展开时食用，以及在紧急口粮（K-口粮或D-口粮）短缺时食用。C-口粮的发展起始于1938年，并在1940年开始战场测试，之后就被大规模采用。二战后，成本问题导致C-口粮忽视了环境兼容性和重量限制。

C-口粮在1958年被MCI口粮取代，虽然MCI是一种全新的口粮，但MCI和最初的C-口粮十分相似，可以说是C-口粮的衍生产品。并且事实上，MCI在它被作为单兵作战口粮期间（1958年-1980年） 仍被美军士兵称作C-口粮。

The C-Ration, or Type C ration, was an individual canned, pre-cooked, and prepared wet ration. It was intended to be issued to U.S. military land forces when fresh food (A-ration) or packaged unprepared food (B-ration) prepared in mess halls or field kitchens was not possible or not available, and when a survival ration (K-ration or D-ration) was insufficient. Development began in 1938 with the first rations being field tested in 1940 and wide-scale adoption following soon after. Operational conditions often caused the C-ration to be standardized for field issue regardless of environmental suitability or weight limitations.