This review of the land and freshwater snails of Campeche, Mexico, records 59 species and subspecies of snails including 47 terrestrial and 12 acquatic forms; 21 are recorded for the first time from the state. Miradiscops haplocochlion is described as new; 11 previously recognized taxa are placed in synonymy. Streptostyla, subgenus Chersomitra, is redefined and the soft anatomy of its type species S. nigricans (Pfeiffer) is described for the first time. Brachypodella dubia (Pilsbry) is resurrected as a species and distinguished from B. speluncae (Pfeiffer). New descriptions are given for both these species and for Choanopoma andrewsae (Ancey). Material from adjacent states pertaining to Campeche species is also included.