Nikša () is a masculine given name, a Bosnian/Croatian/Serbian variant of Nikola (cognate to Nicholas).
Notable people with the name include:
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 (1946–2024), 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 (born 1970), Croatian scientist, writer, director and musician