Otakar is a masculine Czech given name of Germanic origin (cf. Audovacar). Notable people with the name include:
Otakar Batlička (1895–1942), Czech adventurer, journalist, ham radio operator, member of Czech Nazi resistance group in World War IIOtakar Borůvka (1899–1995), Czech mathematician best known today for his work in graph theoryOtakar Bystřina (1861–1931), pen name for a Czech writer who was a subject of Austria for much of his lifeOtakar Hemele (1926–2001), Czech football player, who was a devoted player of Slavia PragueOtakar Hollmann (1894–1967), Czech pianist who was notable in the repertoire for left-handed pianistsOtakar Hořínek (born 1929), Czech sport shooterOtakar Hostinský (1847–1910), Czech historian, musicologist, and professor of musical aestheticsOtakar Janecký (born 1960), retired Czech ice hockey forwardOtakar Jaroš (1912–1943), Czech officer in the Czechoslovak forces in the Soviet UnionOtakar Jeremiáš (1892–1962), Czech composer, conductor and teacherOtakar Kouba (born 1906), Czechoslovak canoeist who competed in the 1936 Summer OlympicsOtakar Kraus (1909–1980), Czech (later British), operatic baritone and teacherOtakar Kubín (1883–1969), Czech painter and sculptor born in Boskovice, Moravia, Austria-HungaryOtakar Lada (1883–1956), Bohemian fencerOtakar Mařák (1872–1939), tenor Czech opera singerOtakar Mareček (born 1943), Czech rower and Olympic competitorOtakar Motejl (1932–2010), Czech lawyer and politicianOtakar Německý (1902–1967), Czechoslovakian Nordic skier who competed in Nordic combined and Cross-country skiing in the 1920sOtakar Nožíř (1917–2006), Czech football midfielderOtakar Odložilík (1899–1973), Czech historian and archivist who wrote about the history of Protestantism in Bohemia and MoraviaOtakar Ostrčil (1879–1935), Czech composer and conductorOtakar Pertold (born 1884), Czech Indologist, religious studies historian and ethnologistOtakar Sedloň (1885–1973), Czech realistic painter living in PragueOtakar Ševčík (1852–1934), Czech violinist and influential teacherOtakar Švec (1892–1955), Czech sculptor best known for his colossal granite Monument to Stalin in PragueOtakar Švorčík (1886–1955), Czech fencerOtakar Vávra (1911–2011), Czech film director, screenwriter and pedagogueOtakar Vindyš (1884–1949), Czechoslovak ice hockey player and Olympic competitorOtakar Zich (1879–1934), distinguished Czech composer and aesthetician