Vast Aire (born Theodore Arrington III on February 5, 1978) is a rapper from New York City. He is one half of the New York hip hop duo Cannibal Ox, which consists of him and fellow rapper Vordul Mega. He is also a member of the rap group Atoms Family. He was born in Mount Vernon, New York, then lived in Jamaica, Queens before moving to Harlem, and became acquainted with the underground rap scene, performing in many clubs while still a teenager. He was once a part of the underground hip hop group The Weathermen.

Vast Aire's fame increased significantly as part of Cannibal Ox with Vordul Mega. Together with producer El-P, it recorded its debut album, The Cold Vein, and released it in 2001. The album was a critical success. Since then, Vast Aire has pursued solo interests. His first solo album Look, Mom...No Hands was released in April 2004. This was followed by The Best Damn Rap Show, a collaborative effort with DJ Mighty Mi from The High & Mighty in 2005. These solo projects did not break Vast Aire from his obligations at Definitive Jux with Cannibal Ox. Vast has since gone on to work with members from the Megahertz crew, and was a member of The Weathermen alongside Copywrite, Yak Ballz, Cage, Aesop Rock, the late Camu Tao, and Tame One. However, he was kicked out of the Weathermen by Camu Tao after allegedly stealing from both Yak Ballz and Tame One. In 2009 he denounced the Weathermen group as a whole. This followed rapper and Weathermen founder Cage writing the song "Nothing Left to Say" about Vast Aire trying to profit from Camu Tao's death and then calling him out on his Myspace page. Vast Aire is also a part of a group called LXG, the League of Extraordinary Gentlemen.