John May may refer to:
Business John May (angel investor), manager of Business Angel investment groups John May (shipwright) (1694–1779), English shipwright in Dutch service John May (youth worker) (born 1964), chief executive of Career Academies UK and member of the World Scout Committee John C. May, president and CEO of John Deere
Clergy John May (bishop) (died 1598), Bishop of Carlisle John May (priest) (died 1893), Dean of St George's Cathedral, Georgetown, Guyana John L. May (1922–1994), Archbishop of St Louis
Politics John May (Australian politician) (1844–1917), member of the Queensland Legislative Assembly John May (North Carolina politician) (1950–2017), member of the North Carolina legislature
Sport Jack May (tennis) (1925–2012), Australian tennis player John May (Australian footballer) (born 1951), Australian footballer who played for Essendon John May (cricketer) (1845–?), English cricketer John May (footballer, born 1878) (1878–1933), footballer who played for Rangers FC
Other John May (1744–1790), founder of Maysville, Kentucky John May (gangster), car mechanic for the Moran gang, killed in the Saint Valentine's Day Massacre John May (judge) (1923–1997), British judge who headed the May Inquiry into "Maguire Seven" miscarriage of justice John May (Medal of Honor) (1836–1886), American soldier and Medal of Honor recipient John May (police officer) (1775–1856), superintendent in the London Metropolitan Police John Wilder May (1819–1883), American judge John May (V), episode of the 2009 miniseries V
See also Johnny May (born 1945), Canadian Inuk bush pilot May (surname) Jack May (1922–1997), English actor J. Peter May (Jon Peter May, born 1939), American mathematician