1965–66 European Cup Winners' Cup

The 1965–66 season of the European Cup Winners' Cup club football tournament was won by Borussia Dortmund in an extra-time final victory over Liverpool at Hampden Park in Glasgow. This season of the Cup Winners' Cup was the first instance of the away goals rule being applied in football history.

First round

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Second leg
Olympiakos won 2–1 on aggregate.

Știința Cluj won 3–0 on aggregate.

Dynamo Kiev won 10–1 on aggregate.

Liverpool won 2–1 on aggregate.

CSKA Cherveno Zname won 4–1 on aggregate.

AGF won 4–2 on aggregate.

Second round

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Second leg
Atlético Madrid won 6–0 on aggregate.

Dynamo Kiev won 6–1 on aggregate.

West Ham United won 6–2 on aggregate.

Borussia Dortmund won 5–4 on aggregate.

Quarter-finals

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Second leg
Celtic won 4–1 on aggregate.

West Ham United won 2–1 on aggregate.

Semi-finals

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Second leg
Borussia Dortmund won 5–2 on aggregate.

Liverpool won 2–1 on aggregate.