The Connecticut Colony or Colony of Connecticut is an English colony located in British America that becomes the U.S. state of Connecticut.

Originally known as the River Colony, it is organized on March 3, 1636 as a haven for Puritan noblemen.

After early struggles with the Dutch, the English gain control of the colony permanently by the late 1630s.

The colony is later the scene of a bloody war between the English and Indians, known as the Pequot War.

It plays a significant role in the establishment of self-government in the New World with its legendary refusal to surrender local authority to the Dominion of New England, an event known as the Charter Oak incident which occurrs at Jeremy Adams' inn & tavern.Two other English colonies in the present-day state of Connecticut are merged into the Colony of Connecticut: Saybrook Colony in 1644 and New Haven Colony in 1662.