Religious figures •
Pope Leo, 14 popes •
Pope Leo XIV (born 1955), incumbent pope •
List of saints named Leo •
Leo of Constantinople (fl. 1134–1143), Patriarch of Constantinople •
Leo Rajendram Antony (1927–2012), 4th
Bishop of Trincomalee •
Leo Baeck (1873–1956), German rabbi, scholar, and theologian •
Leo Zhedenov (1883–1959), member of the Russian apostolate
Rulers •
Emperor Leo, six (or seven) Byzantine emperors •
King Leo, five Armenian kings •
Leo I, Prince of Armenia (died 1140)
Scientists •
Leo Esaki (born 1925), Japanese physicist and Nobel laureate •
Leo Kadanoff (1937–2015), American physicist •
Leo Stodolsky, physicist •
Leó Szilárd (1898–1964), Jewish Hungarian-American physicist
Sports Association football •
Leo Andersson (born 2004), Finnish footballer •
Leo Beenhakker (1942–2025), Dutch football manager •
Leo Bosschart (1888–1951), Dutch footballer •
Leo Fortune-West (born 1971), English footballer •
Leo Krupnik (born 1979), Ukrainian-born American-Israeli former soccer player and current soccer coach •
Leo Kyllönen (born 2004), Finnish footballer •
Leo Messi (born 1987), Argentine footballer •
Leo Walta (born 2003), Finnish footballer
Other sports •
Leo Atang (born 2007), English professional boxer •
Leo Baker (skateboarder) (born 1991), American skateboarder •
Leo Barry (born 1977), Australian rules footballer •
Leo Cantor (1919–1995), American NFL football player •
Leo Chenal (born 2000), American football player •
Leo Durocher (1905–1991), American baseball player and manager •
Leo Franciosi (born 1932), Sammarinese sports shooter •
Leo Hilokoski (born 1941), Finnish bowler •
Leo Klein Gebbink (born 1968), Dutch field hockey player •
Leo Koloamatangi (born 1994), American football player •
Leo Komarov (born 1987), Finnish ice hockey player •
Leo Lööf (born 2002), Swedish ice hockey player •
Leo Mazzone (born 1948), pitching coach for the Atlanta Braves and the Baltimore Orioles •
Leo McCrea (born 2003), British-Swiss Paralympic swimmer •
Leo Merle (born 1998), American Paralympic athlete •
Leo Monahan (sportswriter) (1926–2013), American sports journalist •
Leo Nomellini (1924–2000), American football player in both the College and Pro Football Halls of Fame •
Leo Peelen (1968–2017), Dutch track cyclist •
Leo Prantner (born 2001), Italian handball player •
Leo Rivas (born 1997), Venezuelan baseball player •
Leo Visser (born 1966), Dutch ice speed skater •
Leo van Vliet (born 1955), Dutch road bicycle racer
Artists and entertainers •
Leo Arnaud (1904–1991), French-American composer •
Leo de Berardinis (1940–2008), Italian stage actor and theatre director •
Leo de Bever (1930–2015), Dutch architect •
Leo G. Carroll (1886–1972), English actor •
Leo Chiosso (1920–2006), Italian lyricist •
Leo F. Forbstein (1892–1948), American film musical director and orchestra conductor •
Leo Gorcey (1917–1969), American actor •
Leo Howard (born 1997), American actor and martial artist •
Leo von König (1871–1944), German painter •
Leo Kottke (born 1945), American finger-style guitarist •
Leo Ku (born 1972), Hong Kong singer and actor •
Leo Leandros (1923–2025), Greek musician, composer, and producer •
Leo Lee (born 2002), Australian singer-songwriter and member of South Korean boy band
Alpha Drive One •
Leo Monahan (artist) (born 1933), American paper artist •
Leo Rosten (1908–1997), American humorist •
Leo Saussay (born 1990), Thai actor and singer •
Leo Sayer (born 1948), British-born Australian pop musician •
Leo Tolstoy (1826–1910), Russian novelist
Politicians •
Leo Andy (born 1938), Guadeloupean politician •
Leo von Caprivi (1831–1899), German general and Chancellor of Germany •
Leo Fernando (1895–1954), Sri Lankan Sinhala businessman, Member of Parliament for
Buttala Electoral District •
Leo Keke (1947–2012), Nauruan politician •
Leo McAdam (1930–2024), Canadian politician •
Leo Parskey (1915–1994), justice of the Connecticut Supreme Court •
Leo Ryan (1925–1978), California Congressman killed at Jonestown •
Leo Varadkar (born 1979), Irish politician and Tánaiste
Other •
Leo of Tripoli (died after 921/2), Greek renegade and admiral for the Abbasid Caliphate •
Leo Africanus (?), Andalusian Berber Moorish diplomat and author •
Leo Burnett (1891–1971), American advertising executive • •
Leo Fender (1909–1991), American inventor, maker of electric guitars •
Leo Frank (1884–1915), American Jew murdered by a lynch mob •
Leo Jogiches (1867–1919), Russian Marxist revolutionary •
Leo Krim (2010–2012), American child killed along with his sister Lucia by their nanny •
Leo Laporte (born 1956), American technology broadcaster and author •
Leo Lee Tung-hai (1921–2010), Chairman of the Board of the Tung Wah Group of Hospitals from 1970–1971, businessman and philanthropist in Hong Kong •
A. Leo Levin (1919–2015), American law professor •
Leo Loudenslager (1944–1997), American world champion aerobatics aviator •
Leo Sauvage, French journalist •
Leo Schuster (1791–1871), German-born British cotton-trader and merchant banker •
Leo Strauss (1899–1973), American political philosopher ==Fictional characters==