Frank Edmund Garretson (February 27, 1918 – January 23, 2006) was an American military officer who served in the United States Marine Corps with the rank of brigadier general. A veteran of World War II, he distinguished himself as commanding officer of Company F, 2nd Battalion, 24th Marines, 4th Marine Division during the attack on Namur Island, Kwajalein Atoll, on February 1–2, 1944 and received the Navy Cross, the United States' second-highest decoration awarded for valor in combat.