Halsnøy or Halsnøya may refer to:
Places Halsnøy, Rogaland, an island in Stavanger Municipality in Rogaland county, Norway Halsnøya, an island in Kvinnherad Municipality in Vestland county, Norway Halsnøy Abbey, a historic abbey in Kvinnherad Municipality in Vestland county, Norway
Other Halsnøy IL, a sports club based in Kvinnherad Municipality in Vestland county, Norway Halsnøy Tunnel, a subsea road tunnel which connects the island of Halsnøya to the mainland in Kvinnherad Municipality in Vestland county, Norway