The 1955–56 Liga Gimel season saw 72 clubs competing in 10 regional divisions for promotion to Liga Bet. This was the first season of fourth tier football in Israel, following the formation of Liga Leumit as the top division.
Hapoel Saded, Hapoel Kfar Ata, Hapoel Tiberias, Hapoel Zikhron Ya'akov, Hapoel Givat Haim, Hapoel Lod, Hapoel Holon, Hapoel Jaffa, Hapoel Ramla and Hapoel Be'er Sheva won their regional divisions and qualified for the Promotion play-offs.
At the Promotion play-offs, Hapoel Kfar Ata and Hapoel Tiberias were promoted to Liga Bet from the North play-offs, whilst Hapoel Ramla and Hapoel Be'er Sheva were promoted to Liga Bet from the South play-offs.
Hapoel She'ar Yashuv and Maccabi Safed withdrew from the league during the season.