John McManus is the name of: J. P. McManus (born 1951), Irish businessman and racehorse owner John C. McManus (born 1965), American military historian and author John McManus (New Zealand politician) (1875–1950), New Zealand politician, trade unionist and farmer John McManus (author), American novelist John McManus (diplomat), former British Ambassador to Guinea John T. McManus (1904–1961), American journalist and progressive politician Red McManus (1925–2013), American college basketball coach Rove McManus (born 1974), Australian television identity