Captain Declan Keogh was the commander of the Federation starship USS Odyssey in the Star Trek: DS9 episode "The Jem'Hadar". He was portrayed by Alan Oppenheimer.
Keogh was assigned the mission of rescuing Commander Benjamin Sisko, commanding officer of Deep Space 9, who had been captured by the Jem'Hadar, and to investigate the threat posed by the Dominion. Accompanied by the runabouts Orinoco and Mekong, the Odyssey traveled through the Bajoran wormhole where they engaged in battle with a number of Jem'Hadar fighters. Although their mission was a success and Sisko was rescued, Keogh and the rest of the Odyssey's crew were killed when a Jem'Hadar vessel made a suicide run at the ship, in an effort to send a message as to exactly how dedicated they were to maintaining their dominant stance.