The 1965–66 Liga Gimel season saw 175 clubs competing in 14 regional divisions for promotion to Liga Bet. , , Hapoel Beit She'an, , Hapoel Atlit, Hapoel Zikhron Ya'akov, , , , Maccabi Ramla, Beitar Beit Dagan, Maccabi Kiryat Gat, Beitar Ashdod and Hapoel Yeruham won their regional divisions and qualified for the Promotion play-offs. At the Promotion play-offs, Hapoel Beit She'an, , Hapoel Atlit and Hapoel Zikhron Ya'akov were promoted to Liga Bet from the North play-offs, whilst Maccabi Ramla, Beitar Beit Dagan, and were promoted to Liga Bet from the South play-offs.