| Yugoslav Cup | |
| Year: | 1965–66 |
| Other Titles: | Marshal Tito Cup |
| Country: | Yugoslavia |
| Winners: | OFK Belgrade (4th title) |
| Second: | Dinamo Zagreb |
| Prev Season: | 1964–65 |
| Next Season: | 1966–67 |
The 1965–66 Yugoslav Cup was the 19th season of the top football knockout competition in SFR Yugoslavia, the Yugoslav Cup (sh|Kup Jugoslavije), also known as the "Marshal Tito Cup" (Kup Maršala Tita), since its establishment in 1946.
In the following tables winning teams are marked in bold; teams from outside top level are marked in italic script.
| width=40 | Tie no | width=150 | Home team | width=80 | Score | width=150 | Away team |
|---|---|---|---|---|---|---|---|
| 1 | Aluminij Kidričevo | 0–4 | Slavonija Osijek | ||||
| 2 | FK Bačka Bačka Palanka | 2–3 | Vardar | ||||
| 3 | Hajduk Split | 0–0 (3–4 p) | Dinamo Zagreb | ||||
| 4 | Rijeka | 3–1 | Partizan | ||||
| 5 | Sloboda Tuzla | 5–0 | Mladost Smederevska Palanka | ||||
| 6 | Sutjeska Nikšić | 3–3 (5–7 p) | OFK Belgrade | ||||
| 7 | Trepča | 3–1 | Red Star | ||||
| 8 | Željezničar Sarajevo | 0–1 | Srem |
| width=40 | Tie no | width=150 | Home team | width=80 | Score | width=150 | Away team |
|---|---|---|---|---|---|---|---|
| 1 | Dinamo Zagreb | 1–0 | Trepča | ||||
| 2 | Slavonija Osijek | 2–1 | Rijeka | ||||
| 3 | Srem | 1–2 | OFK Belgrade | ||||
| 4 | Vardar | 0–0 (3–4 p) | Sloboda Tuzla |
| width=40 | Tie no | width=150 | Home team | width=80 | Score | width=150 | Away team |
|---|---|---|---|---|---|---|---|
| 1 | OFK Belgrade | 2–0 | Sloboda Tuzla | ||||
| 2 | Slavonija Osijek | 1–5 | Dinamo Zagreb |
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