Brusnik is a Slavic toponym, derived from brus, meaning whetstone, or brusnica, meaning "cranberry" or "cowberry". It may refer to:

Bulgaria Brusnik, Bulgaria, a village in Pernik Province

Croatia Brusnik (island), a volcanic island in the Adriatic Sea Brusnik, Croatia, a village in Pakrac Brusnik, a village in Srbac

Kosovo Brusnik, Vučitrn, a village

North Macedonia Brusnik, Bitola, a village Brusnik, Negotino, a village in Negotino Municipality

Poland Bruśnik, a village in arnów County, Lesser Poland Voivodeship

Serbia Brusnik, Ivanjica, a village Brusnik, Zaječar, a village

Slovakia Brusník, a village and municipality in Banská Bystrica Region

See also Brusnica (disambiguation)