A. J. Davis may refer to:

• Alexander Jackson Davis (1803–1892), architect
• Andrew Jackson Davis (1826–1910), an American Spiritualist
• A. J. Davis (cornerback, born 1983), American football player
• A. J. Davis (cornerback, born 1989), American football player
• A. J. Davis (basketball), American professional basketball player

• Order of battle of the Battle of Quatre Bras
• Order of battle of the Battle of Shanghai
• Order of battle of the Battle of Shanghai (1937)
• Order of battle of the Battle of Taiyuan
• Order of battle of the Battle of Xuzhou
• Order of Battle of the Chindits
• Order of battle of the German Ninth Army, October 1941
• Order of Battle of the Riverine Flotilla of the Polish Navy
• Order of Battle of the Waterloo Campaign
• Order of battle Operation Jehol
• Order of Battle Peiking – Hankou Railway Operation
• Order of Battle Peiking – Hankow Railway Operation
• Order of battle Peiking – Suiyuan Railway Operation
• Order of battle Swatow Operation
• Order of Battle Tianjin–Pukou Railway Operation
• Order of Beneficence (Greek medal)
• Order of Blue Sky and White Sun
• Order of Blue Sky and White Sun with Grand Cordon
• Order Of British Columbia
• Order of British India
• Order of Burma
• Order Of Canada
• Order of Captives
• Order of Capuchin Friars Minor
• Order of Chaerona