Ostap (Ukrainian: Остап) is a Ukrainian male given name. It derives from the Greek name Eustathius.

People with this name include:

• Ostap Bender, a fictional character from the Russian novel The Twelve Chairs
• Ostap Dashkevych (ca. 1495–1535), commander of the Ukrainian Cossacks
• Ostap Ortwin (1876–1942), Polish journalist
• Ostap Steckiw (1924–2001), Polish-born Canadian soccer player
• Ostap Veresai (1803–1890), Ukrainian minstrel
• Ostap Vyshnya (1889–1956), Ukrainian writer, satirist, and medical official

This page or section lists people that share the same given name.
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