Sir Archibald Richard James Southby, 1st Baronet DL (8 July 1886 – 30 October 1969) was an English Royal Navy officer and Conservative Party politician.

Southby joined the Royal Navy, and on 15 September 1902 was posted as a naval cadet to the pre-dreadnought battleship HMS Magnificent,[1] flagship to the second-in-command of the Channel Fleet.

The following month it was reported that he would be lent to the armoured cruiser HMS Hogue which was in the last stages of completion before her first commission in November.

It seemed to me that if he had been in charge of the affairs of the nation at the beginning of the war, rightly or wrongly, he would have considered that the proper action for us to have taken would have been to have gone into Norway and Sweden before Germany did.

This article about a Conservative Member of the Parliament of the United Kingdom representing an English constituency and born in the 1880s is a stub.