| Birth Date: | 1917 |
| Birth Place: | Tamra, Palestine |
| Death Date: | 18 February 1984 |
| Suboffice1: | Cooperation and Brotherhood |
| Office1: | Faction represented in the Knesset |
| Subterm1: | 1959–1961 |
Yussef Abdallah Diab (Arabic: يوسف عبدالله دياب, Hebrew: יוסף דיאב, 1917 – 18 February 1984) was an Israeli Arab politician who served as a member of the Knesset for Cooperation and Brotherhood between 1959 and 1961.
Born in Tamra in 1917, Diab was elected to the Knesset on the Cooperation and Brotherhood list in 1959. Although the party retained its two-seat strength in the 1961 elections, both Diab and Labib Hussein Abu Rokan lost their seats.
He died in 1984.