John A. Brown may refer to:
John A. Brown Jr. (c. 1962–1997), American murderer executed in Louisiana for the murder of Omer Laughlin John A. Brown (died 1940), founder of John A. Brown (department store), Oklahoma-based department store chain John Albert Brown (1885–1944), president of Mobil John Alf Brown (1881–1936), Welsh international rugby union player John Appleton Brown (1844–1902), American painter John Arnesby Brown (1866–1955), English footballer and landscape artist
See also John Alexander Voules Brown (1852–1945), member of the South Australian House of Assembly John Martin Ainley Brown (1928–2005), New Zealand Test match umpire