| Competition: | Liga Alef |
| Season: | 1965-66 |
| Winners: | North Division - Maccabi Haifa, South Division - Sektzia Nes Tziona |
| Promoted: | North Division - Maccabi Haifa, South Division - Sektzia Nes Tziona |
| Relegated: | North Division - Hapoel Kiryat Shmona, Beitar Haifa, South Division - HaBira Jerusalem, Hapoel Givatayim |
| Prevseason: | 1964-65 |
| Nextseason: | 1966-68 |
The 1965–66 Liga Alef season saw Maccabi Haifa (champions of the North Division) and SK Nes Tziona (champions of the South Division) win the title and promotion to Liga Leumit.