A number of species of non-marine molluscs are found in the wild in Montana. ;Gastropods There at least 155 species of
gastropods found in Montana. Some of these species are
exotics (not native to Montana) and some species have been designated as
Species of Concern. ;Freshwater bivalves There are at least 42 species of
freshwater bivalves known in
Montana. The
Montana Department of Fish, Wildlife and Parks has identified a number of bivalve species as
Species of Concern. ==List of non-marine molluscs==