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 footballer
Jô (born 1988), nickname for Josiel Alves de Oliveira, Brazilian footballer
Joanna Jo Aleh (born 1986), New Zealand sailor, national, world and Olympic champion
Joanna Jo Ankier (born 1982), British record holder (1,500-m & 3,000-m steeplechase)
Jo Butler (born 1969), a Big Brother UK contestant
John Jo Callis (born 1951), British guitarist, notably with The Human League
Joanne Jo Coburn (born 1968), BBC political correspondent
Helen Joanne Jo Cox (1974–2016), British politician
Johanna Jo Cox-Ladru (born 1923), Dutch Olympic gymnast
Joanna Jo Durie (born 1960), retired English female tennis player
Joanne Jo Ellis (born 1983), English field hockey forward
Joanne Jo Frost (born 1971), English nanny, writer and TV hostess
Jo Kamisaku (born 1971), also known as Kamisaku Jo, Japanese murderer and rapist
Joanne Jo Pavey (born 1973), British Olympian and distance runner
Joanne "Jo" J. K. Rowling (born 1965), author of the Harry Potter book series
Jo Ann Robinson (1912–1990), American civil rights activist
José Jô Soares (born 1938), Brazilian comedian, talk show host, author and musician
Jo Stafford (1917–2008), American singer of traditional pop music
Joseph Jo Siffert (born 1936), Swiss racing driver
Joanne Jo Wells (born 1965), British Anglican priest, Bishop-designate of Dorking
