Lou (given name)
Lou is a unisex given name. For males, it is frequently a short form (hypocorism) of Louis or Lewis, for females of Louise, etc. It may refer to:
People
Men
- Lou Adler (born 1933), American record producer, music executive, talent manager, songwriter and film director and producer
 - Lou Albano (1933–2009), Italian-American professional wrestler, manager and actor
 - Lou Bega (born 1975), German singer
 - Lou Boudreau (1917–2001), American Hall of Fame baseball player
 - Lou Brock (1939–2020), American Hall-of-Fame Major League Baseball player
 - Lou Busch (1910–1979), American musician and songwriter
 - Lou Costello, stage name of American actor and comedian Louis Cristillo (1906-1959)
 - Lou Diamond Phillips, American actor and director born James Diamond in 1962
 - Lou DiBella, American boxing promoter and television/film producer
 - Lou Dobbs (born 1945), American television anchor, radio host and author
 - Lou Duva, American boxing trainer and boxing promoter
 - Lou Ferrigno (born 1951), American bodybuilder and actor
 - Lou Ferrigno Jr. (born 1984), American actor
 - Lou Frizzell (1920–1979), American actor and music director
 - Lou Gehrig (1903–1941), American Hall-of-Fame Major League Baseball player
 - Lou Gordon (American football) (1908–1976), American National Football League player
 - Lou Gordon (journalist) (1917–1977), American radio and television commentator and newspaper reporter
 - Lou Gramm, stage name of American rock singer and songwriter Louis Grammatico (b. 1950)
 - Lou Groza (1924–2000), American footballer, Hall of Fame placekicker for the Cleveland Browns
 - Lou Harrison (1917–2003), American composer
 - Lou Hedley (born 1993), Australian American football player
 - Lou Henson (1932–2020), American basketball coach
 - Lou Holtz (born 1937), American former football player, coach and analyst
 - Lou Jacobi (1913–2009), Canadian actor
 - Lou Jacobs (1903–1992), German-American circus clown
 - Lou Johnson (1934–2020), American baseball player
 - Lou Johnson (pitcher) (1869–1941), American baseball pitcher
 - Lou Johnson (singer) (1941–2019), American soul singer and pianist
 - Lou Kenton (1908–2012), English proofreader
 - Lou Kilzer (born 1951), American journalist
 - Lou Kolls (1892–1941), American baseball umpire
 - Lou Marini (born 1945), American saxophonist, arranger and composer
 - Lou Merrill (1912–1963), American actor
 - Lou Michaels (1935–2016), American football player
 - Lou Pearlman (1954–2016), American record producer
 - Lou Phelan (1864–1933), American baseball manager
 - Lou Piniella (born 1943), American former Major League Baseball player and manager
 - Lou Preager (1906–1978), British dance band leader
 - Lou Rawls (1933–2006), American singer, songwriter and record producer
 - Lou Reed (1942–2013), American musician, singer and songwriter
 - Lou Reed (rugby union) (born 1987), Welsh rugby union footballer
 - Lou Richards (1923–2017), Australian rules footballer and sports journalist
 - Lou Savarese, American boxing-fighter
 - Louis J. Sebille (1915–1950), American Korean War pilot posthumously awarded the Medal of Honor
 - Lou Silver, American-Israeli basketball player
 - Lou Sullivan (1951-1991), American author and activist known for his work on behalf of trans men
 - Lou Thesz (1916–2002), American professional wrestler
 - Lou Vairo (born 1945), American ice hockey coach
 - Lou Viglione, former NASCAR Cup Series team owner
 - Lou Vincent (born 1945), New Zealand cricket player
 - Lou Williams (born 1986), American National Basketball Association player
 
Women
- Lou Andreas-Salomé (1861–1937), Russian-born psychoanalyst and author
 - Lou Doillon (born 1982), French singer-songwriter, actress, and model
 - Lou Fellingham (born 1974), English contemporary Christian singer and songwriter
 - Lou Henry Hoover (1874–1944), wife of US President Herbert Hoover
 - Lou Jean (born 2004), stage name Lou (French singer)
 - Louise Lieberman (born 1977), American soccer coach and former player
 - Lou Sanders, British comedian
 - Lou Wotton (born 1983), Australian rules footballer
 
Non-binary people
- Lou Wall, Australian comedian
 
Fictional TV characters
- Lou Beale, on the BBC soap opera EastEnders
 - Lou Grant, on The Mary Tyler Moore Show and Lou Grant
 - Lou Solverson, on Fargo
 - Lou (The Simpsons), a policeman on The Simpsons
 - Lou (Ninjago), in Ninjago
 - Lou, a female Flashman on Choushinsei Flashman