Jiří Ryba (Czech pronunciation: [ˈjɪr̝iː ˈrɪba]) (born 15 June 1976 in Tábor) is a former Czech decathlete. His personal best result was 8339 points, achieved in May 2000 in Desenzano del Garda. Ryba is married to pole vaulter Pavla Hamáčková.
Following his career in athletics, Ryba became a fitness coach in the Gambrinus liga before moving to 1. FK Příbram as assistant manager. In 2016, he became a fitness coach in the Bahrain national football team alongside Miroslav Soukup and Andrej Kostolansky.