The name Afritz is ultimately derived from the Slovene prepositional phrase za brdce 'behind the small hill'. The Slovene phrase fused to yield *Zabrdce, which was borrowed into Middle High German as *Zafriz (from which, in turn, Cobrc was borrowed back into Slovene). The initial z- was misunderstood as the Middle High German preposition ze 'at', yielding the modern German decomposition Afritz.
In 1973 the municipality merged with neighbouring Feld am See, but since 1991 has again been a municipality in its own right. The appendix am See was added in 2000, mainly four tourist reasons, though officially Lake Afritz belongs to the municipal area of Feld am See.