The Popham Colony—also known as the Sagadahoc Colony—was a short-lived English colonial settlement in North America. It was established in 1607 by the proprietary Plymouth Company and was located in the present-day town of Phippsburg, Maine, near the mouth of the Kennebec River. It was founded a few months after its more successful rival, the colony at Jamestown. That colony was established on May 4, 1607 by the London Company in present-day James City County, Virginia.

Sir Humphrey Gilbert was an English adventurer, explorer, member of parliament and soldier who served during the reign of Queen Elizabeth I and was a pioneer of the English colonial empire in North America and the Plantations of Ireland. He was a maternal half-brother of Sir Walter Raleigh and a cousin of Sir Richard Grenville.