Bath is a city in Sagadahoc County, Maine, United States. Bath is included in the Brunswick micropolitan. The population was 8,766 at the 2020 census. It is the county seat of Sagadahoc County, which includes one city and 10 towns. The city is popular with tourists, many drawn by its 19th-century architecture. It is home to the Bath Iron Works and Heritage Days Festival, held annually on the Fourth of July weekend. It is commonly known as "The City of Ships" because of all the sailing ships that were built in the Bath shipyards. Bath is part of the Portland-South Portland-Biddeford metropolitan statistical area.

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.