Jo is a given name, often a short form (hypocorism) of Joanna, Joanne, etc. Notable people with the name include:
Jô (born 1987), nickname for João Alves de Assis Silva, Brazilian footballerJô (born 1988), nickname for Josiel Alves de Oliveira, Brazilian footballerJoanna Jo Aleh (born 1986), New Zealand sailor, national, world and Olympic championJoanna Jo Ankier (born 1982), British record holder (1,500-m & 3,000-m steeplechase)Jo Butler (born 1969), a Big Brother UK contestantJohn Jo Callis (born 1951), British guitarist, notably with The Human LeagueJoanne Jo Coburn (born 1968), BBC political correspondentHelen Joanne Jo Cox (1974–2016), British politicianJohanna Jo Cox-Ladru (born 1923), Dutch Olympic gymnastJoanna Jo Durie (born 1960), retired English female tennis playerJoanne Jo Ellis (born 1983), English field hockey forwardJoanne Jo Frost (born 1971), English nanny, writer and TV hostessJo Kamisaku (born 1971), also known as Kamisaku Jo, Japanese murderer and rapistJoanne Jo Pavey (born 1973), British Olympian and distance runnerJoanne "Jo" J. K. Rowling (born 1965), author of the Harry Potter book seriesJo Ann Robinson (1912–1990), American civil rights activistJosé Jô Soares (born 1938), Brazilian comedian, talk show host, author and musicianJo Stafford (1917–2008), American singer of traditional pop musicJoseph Jo Siffert (born 1936), Swiss racing driverJoanne Jo Wells (born 1965), British Anglican priest, Bishop-designate of Dorking