Zbigniew Marian Radziwonowicz (8 December 1930 – 11 December 2002) was a Polish athlete. He competed in the men's javelin throw at the 1952 Summer Olympics and the 1960 Summer Olympics.
His personal best in the old model javelin was 77.65 metres set in Warsaw in 1957.
International competitions Representing 1952Olympic GamesHelsinki, Finland20th (q)61.50 m1953World Festival of Youth and Students Bucharest, Romania3rd69.51 m1954World Student Games Budapest, Hungary2nd70.46 mEuropean ChampionshipsBern, Switzerland7th69.84 m1958European ChampionshipsStockholm, Sweden10th71.20 m1960Olympic GamesRome, Italy7th77.31 m
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