eastern United States

The Eastern United States, the American East, or simply the East is traditionally defined as the states east of the Mississippi River. The first two tiers of states west of the Mississippi have traditionally been considered part of the West, but can be included in the East today; usually in regional models that exclude a Central region. The estimated population of the eastern United States as of 2006 is about 148,000,000.
See more at Wikipedia.org...

Noun
1. the region of the United States lying north of the Ohio River and east of the Mississippi River
(synonym) East
(hypernym) geographical area, geographic area, geographical region, geographic region
(part-holonym) United States, United States of America, America, US, U.S., USA, U.S.A.
(part-meronym) Southeast, southeastern United States
(attribute) eastern