Berehynia or Bereginia (Russian and Ukrainian: Береги́ня) is a female spirit (Vila) in Slavic mythology, which recently came to be regarded as a "Slavic goddess" with a function of "hearth mother, protectoress of the home" in late 20th century Ukrainian romantic nationalism centered on matriarchal myth.

The word originates in the pre-Christian Slavic mythology but in the modern usage it has two meanings. The confusion in the name's etymology owes to the fact that a Slavic word bereh (Ukrainian) or bereg (Russian) means a river bank, while the word berehty (Ukrainian) or berech' (Russian) is a verb that means to protect.

Originally, obscure shadowy ghost-like naiads similar to Rusalkas lived along the rivers, lakes, and ponds, and were considered ill-tempered and dangerous. A water-bank where they were thought to be found was to be avoided by young men and women, especially in the dark.

Early in the 20th century fakeloristic scholarship speculated that the Berehyni combined a prehistoric Scythian earth-goddess and rusalky (guardians of the banks).