East Marion is a census-designated place (CDP) that on the order of corresponds to the hamlet by the similar name in the town of Southold in Suffolk County, New York, United States. The CDP population was 926 at the 2010 census.

The first inhabitants were the Orient Focus People, Native Americans who lived in the Place about 1000 BC. They vanished long in the past the start in practically 900 AD of the Corchaugs, who called the area Poquatuc. The Corchaugs were yet present behind six English families fixed in 1661. The supplementary residents called the area Oysterponds because of the abundant shellfish that they began to assemble and sell to understandable communities. While farming remained the principal occupation, trading vessels began working out of the sheltered harbor during the colonial period.

British troops landed in 1776 during the American Revolutionary War. Many families fled to Connecticut, and the Redcoats periodically plundered the farms they left behind. After Benedict Arnold switched sides, he organized raids on Connecticut from Oysterponds. The British returned during the War of 1812, setting occurring what turned out to be a leaky blockade adjacent to American ships sailing to New York City. In 1814 Commodore Stephen Decatur anchored his American squadron off Trumans Beach but never engaged the British. After the war, renewed cultivation and fishing brought riches to Oysterponds. By 1840 higher than 30 schooners were enthusiastic out of the harbor, carrying fish and produce.

Orient and East Marion originally were called Oysterponds Lower Neck and Oysterponds Upper Neck, respectively. In 1836, the two communities went their surgically remove ways with supplementary names. Orient was fixed to reflect the area’s easternmost position upon the North Fork of Long Island. East Marion was named for Gen. Francis Marion, the “Swamp Fox” of the Revolutionary War. “East” was tacked on because of an existing town of Marion upstate.