John Gerrard or Gerard may refer to:
John Gerard (c. 1545–1612), English herbalist John Gerard (Jesuit) (1564–1637), English Jesuit priest John Gerard (Royalist) (1632–1654), Royalist during the English Civil War John Gerrard (1720–1787), American Baptist preacher and church founder, after whom Gerrardstown, West Virginia is named John Gerrard (police officer) (1920–2003), British police officer Jon Gerrard (born 1947), Canadian politician and doctor John M. Gerrard (born 1953), American judge John Gerrard (artist) (born 1974), Irish artist
See also