Jiří Čtvrtečka (2 December 1942 – 4 February 2025) was a Czech sprint canoer who competed from the late 1960s to the late 1970s, representing Czechoslovakia.

He won three medals at the ICF Canoe Sprint World Championships with a silver (C-2 500 m: 1975) and two bronzes (C-1 1000 m: 1970, C-2 500 m: 1974).

Čtvrtečka also competed in three Summer Olympics, earning his best finish of fourth in the C-1 1000 m event at Mexico City in 1968.

Čtvrtečka died on 4 February 2025, at the age of 82.

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