Ondřej [ˈondr̝ɛj] is a Czech given name, similar to English Andrew.

• Ondřej Bank (born 1980), Czech alpine skier
• Ondřej Buchtela (1999–2020), Czech ice hockey player
• Ondřej Čelůstka (born 1989), Czech footballer
• Ondřej Cverna (born 1990), Czech footballer
• Ondřej Fiala (born 1987), Czech ice hockey player
• Ondřej Havelka (born 1954), Czech singer
• Ondřej Hejma (born 1951), Czech singer
• Ondřej Herzán (born 1981), Czech footballer
• Ondřej Hotárek (born 1984), Czech skater
• Ondřej Hutník (born 1983), Czech kick boxer
• Ondřej Hyman (born 1986), Czech luger
• Ondřej Kraják (born 1991), Czech footballer
• Ondřej Kratěna (born 1977), Czech ice hockey player
• Ondřej Kučera (born 1987), Czech footballer
• Ondřej Kúdela (born 1987), Czech footballer
• Ondřej Kušnír (born 1984), Czech footballer
• Ondřej Liška (born 1977), Czech politician
• Ondřej Mazuch (born 1989), Czech footballer
• Ondřej Murín (born 1991), Czech footballer
• Ondřej Moravec (born 1984), Czech biathlete
• Ondřej Neff (born 1945), Czech science fiction writer
• Ondřej Němec (born 1984), Czech ice hockey player
• Ondřej Palát (born 1991), Czech ice hockey player
• Ondřej Pála (born 1984), Czech boxer
• Ondřej Pavelec (born 1987), Czech ice hockey player
• Ondřej Poživil (born 1987), Czech ice hockey player
• Ondřej Pukl (died 1936), Czech Olympic athlete
• Ondřej Raab (born 1973), Czech slalom canoeist
• Ondřej Roman (born 1989), Czech ice hockey player
• Ondřej Sehnal (born 1997), Czech basketball player
• Ondřej Sekora (1899–1967), Czech painter
• Ondřej Šiml (born 1986), Czech footballer
• Ondřej Smetana (footballer) (born 1982), Czech footballer
• Ondřej Smetana (racing driver), Czech racing driver
• Ondřej Sokol (born 1971), Czech film director
• Ondřej Sosenka (born 1975), Czech professional cyclist
• Ondřej Soukup (born 1951), Czech music composer
• Ondřej Šourek (born 1983), Czech footballer
• Ondřej Starosta (born 1979), Czech basketball player
• Ondřej Štěpánek (born 1979), Czech slalom canoeist
• Ondřej Synek (born 1982), Czech rower
• Ondřej Trojan (born 1959), Czech film producer
• Ondřej Vaculík (born 1986), Czech ski jumper
• Ondřej Vaněk (born 1990), Czech footballer
• Ondřej Veselý (born 1977), Czech ice hockey player
• Ondřej Vetchý (born 1962), Czech actor
• Ondřej Vošta (born 1968), Czech ice hockey player
• Ondřej Vrzal (born 1987), Czech footballer
• Ondřej Zetek (born 1971), Czech ice hockey player