Janja is a town in Bijeljina, Bosnia and Herzegovina. Janja may also refer to:
People
Janja Garnbret (born 1999), a Slovenian professional rock climber Janja Kantakouzenos (d. 1477), a medieval nobleman Janja Lalich (born 1945), an American sociologist and writer Janja Mihailović, a Serbian architect Janja Šegel (born 2001), a Slovenian swimmer Janja Vidmar (born 1962), a Slovenian author and screenwriter Rosângela Lula da Silva (born 1966), a Brazilian sociologist and First Lady of Brazil
Other uses
Janja Monastery, a Serbian Orthodox monastery Janja, the antagonist hyena character from The Lion Guard television series