Nikša (Никша) is a given name and a Bosnian/Croatian/Serbian alternative of Nicolas (given name), Nicolas / Nikola. It may refer to:
*Nikša Bratoš (born 1959), Bosnian musician who gained fame in former Yugoslavia, member of bands Valentino and Crvena jabuka
*Nikša Dobud (born 1985), Croatian water polo player
*Nikša Gligo (born 1946), Croatian musicologist and university professor
*Nikša Gradi or Nikola Gradić / Nicoló Gradi (1825–1894), Croatian writer, politician, and lawyer from Dubrovnik
*Nikša Kaleb (born 1973), Croatian handball player
*Nikša Petrović (born 1992), Croatian football player
*Nikša Ranjina or Nicola Ragnina (1494–1582), Croatian writer and noblemen from the Republic of Ragusa (modern-day Dubrovnik)
*Nikša Roki (born 1988), Croatian swimmer
*Nikša Skelin (born 1978), Croatian rower
*Nikša Sviličić (born 1970), Croatian scientist, writer, director and musician
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Croatian masculine given names
Serbian masculine given names
Bosnian masculine given names