Rajko Janjanin (Serbian Cyrillic: Paj?o Ja?a??? ;born on January 18, 1957 in Karlovac) is a former Croatian-born Serbian football player.
He was capped twice for Yugoslavia.
His shining moment at the club level took place on 19 September 1984 when he scored a second half hat-trick for Red Star Belgrade in the 3-2 European Cup win over S.L.
Benfica after Red star was down 0-2.
His brother Željko was also a footballer.