Udo is a masculine given name. It may refer to:
Medieval era Udo of Neustria, 9th-century nobleman Udo (Obotrite prince) (died 1028) Udo (archbishop of Trier) (c. 1030 – 1078) Lothair Udo II, Margrave of the Nordmark (c. 1025 – 1082)
Modern era Udo Anneken (1917–1997), German Wehrmacht officer in World War II, recipient of the Knight's Cross of the Iron Cross Udo Bullmann (born 1956), German politician Udo Cordes (1921–2007), German Luftwaffe officer in World War II, recipient of the Knight's Cross of the Iron Cross Udo Di Fabio (born 1954), German jurist Udo Dziersk (born 1961), German painter Udo Gurgel (born 1938), German engineer and designer Max Udo Hollrung (1858–1937), German botanist Udo Z. Karzi (born 1970), Indonesian writer Udo Kasemets (1919–2014), Estonian-Canadian composer Udo Keppler (1872–1956), American cartoonist Udo Kier (1944–2025), German actor Udo Margedant (1942–2026), German political scientist Udo Pastörs (born 1952), German far-right politician Udo Proksch (1934–2001), Austrian businessman, industrialist and murderer Udo Samel (born 1953), German actor Udo Schaefer (1926–2019), German lawyer and Bahá'í author Udo Schnelle (born 1952), German theologian and professor Udo Sellbach (1927–2006), German-Australian visual artist and educator Udo Spreitzenbarth, German photographer Udo Stein (born 1983), German politician Udo Steinke (1942–1999), German writer Udo Uibo (born 1956), Estonian literary critic, editor, translator and lexicographer Udo Voigt (1952–2025), German politician Udo Walendy (1927–2022), German author, historian, former soldier and Holocaust denier Udo Weilacher (born 1963), German landscape architect, author and professor Udo von Woyrsch (1895–1983), high-ranking Nazi SS officer responsible for numerous murders during the Holocaust Udo Zander (born 1959), Swedish organizational theorist and former professor of business administration
Music Udo Dahmen (born 1951), German drummer and author Udo Dirkschneider (born 1952), German heavy metal vocalist who formed the band U.D.O. Udo Jürgens (1934–2014), Austrian composer and singer Udo Lindenberg (born 1946), German rock musician and composer Udo Mechels (born 1976), Belgian musician often known simply as "Udo" Udo Suzuki (born 1970), Japanese musician and comedian Udo Zimmermann (1943–2021), German composer, music director and conductor
Sports Udo Beyer (born 1955), East German shot putter Udo Bölts (born 1966), German racing cyclist Udo Fortune (born 1988), Nigerian soccer player Udo Gelhausen (born 1956), West German shot putter Udo Hempel (born 1946), German road and track cyclist Udo Horsmann (born 1952), German footballer Udo Kiessling (born 1955), first ice hockey player to compete in five Olympic Games (1976–1992) Udo Lattek (1935–2015), German football player and coach and TV pundit Udo Lehmann (born 1973), German bobsledder Udo Müller, East German slalom canoeist who competed in the 1970s Udochukwu "Udo" Nwoko (born 1984), Maltese-Nigerian footballer Udo Onwere (born 1971), English footballer Udo Poser (born 1947), East German swimmer Udo Quellmalz (born 1967), German judoka Udo Raumann (born 1969), German slalom canoer Udo Riglewski (born 1966), German tennis player Udo Schütz (born 1937), German racing driver Udo Schwarz (born 1986), German international rugby union player Udo Segreff (born 1973), German ice sledge hockey player Udo Wagner (born 1963), German fencer Udo Werner (1955–2012), West German slalom canoeist
Other Udo of Aachen, fictional 13th-century monk created as a 1999 April Fool's hoax Udo the Red Panda, mascot of the University of Mannheim athletics teams