Tarr–Eaton House

The Elijah Kellogg Church is a historic Congregationalist church at 917 Harpswell Neck Road (Maine State Route 123) in Harpswell, Maine. Built in 1843, it is a well-preserved example of Greek and Gothic Revival architecture, and is further notable for its longtime association with Rev. Elijah Kellogg, a well-known 19th-century writer of children's books. The church building was listed on the National Register of Historic Places in 1979. The church is affiliated with the National Association of Congregational Christian Churches; its pastor is John Carson.

The Harpswell Meetinghouse is a historic colonial meeting house on Maine State Route 123 in Harpswell, Maine. Built in 1757-59 to provide space for both religious services and town meetings, it is a little-altered and well-preserved example of a once-common form, and is the oldest such surviving building in the state of Maine. It was designated a National Historic Landmark in 1968.

Union Church is a historic church on Harpswell Neck Road (Maine State Route 123) in North Harpswell, Maine. Built in 1841, it is architecturally a distinctive and well-preserved combination of Greek Revival and Gothic Revival styles. It was used over the years by a variety of religious groups, and is now maintained by the Harpswell Garden Club. The building was listed on the National Register of Historic Places in 1988.

Harpswell is a town in Cumberland County, Maine, United States, within Casco Bay in the Gulf of Maine. The population was 5,031 at the 2020 census. Harpswell is composed of land contiguous with the rest of Cumberland County, called Harpswell Neck, as well as three large islands connected by bridges: Sebascodegan Island (locally known as Great Island), Orr's Island, and Bailey Island and over 200 smaller islands. Harpswell is part of the Portland–South Portland–Biddeford, Maine Metropolitan Statistical Area.

The Deacon Andrew Dunning House is a historic house on Mountain Road in North Harpswell, Maine. Built about 1757 by one of Harpswell's early settlers, it is one of the town's oldest buildings. It was also the subject of a well-meaning but ill-informed Colonial Revival "restoration" in the 1940s, illustrating some of the issues with those types of actions. The property, which includes the Dunning family cemetery, was listed on the National Register of Historic Places in 1999.

Orr's Island is an island in Casco Bay and the Gulf of Maine, part of the Atlantic Ocean. The island is within the town of Harpswell, Maine, United States, and forms an archipelago with Sebascodegan Island (also known as Great Island) to its north and Bailey Island (reached by the Bailey Island (or Cribstone) Bridge) to its south. Orr's Island is connected to Great Island by the Orr's Island/Great Island Bridge, and is connected to the town of Brunswick on the mainland by Route 24 north over the Gurnet Bridge. Bowdoin College operates a 118-acre (48 ha) coastal studies center on Orr's Island.

The Elijah Kellogg House is an historic house on Barton Lane in Harpswell, Maine. It is a well-preserved Greek Revival house, built in 1849 by Elijah Kellogg, a Congregationalist minister at the nearby church, and a lecturer and author of popular boy's adventure books. The house was listed on the National Register of Historic Places on April 28, 1975.

Harpswell Coastal Academy was a Charter School serving grades 5–12 with a campus located in Harpswell, Maine. The school was funded by the State of Maine. It was one of nine school districts in the state to receive federal funding under the Rethinking Remote Education Venture.

The Bailey Island Bridge (also called the Cribstone Bridge) is a historic bridge in the town of Harpswell within Cumberland County in the state of Maine.

Maine's 1st congressional district is a congressional district in the U.S. state of Maine. The geographically smaller of the state's two congressional districts, the district covers the southern coastal area of the state. The district consists of all of Cumberland, Knox, Lincoln, Sagadahoc, and York counties and most of Kennebec County. Located within the district are the cities of Portland, Brunswick, and Saco. The district is currently represented by Democrat Chellie Pingree.

The Auburn–Harpswell Association Historic District encompasses a well-preserved enclave of summer residences built in the early 20th century in southern Harpswell, Maine. The district includes ten Shingle style houses, a Colonial Revival dining hall, and a Greek Revival meeting hall. The Auburn Colony, an exclusive company of businessmen from Auburn, Maine, was responsible for their development. The district was listed on the National Register of Historic Places in 1985.

Maquoit Bay is a bay in Cumberland County, Maine, in the northern part of Casco Bay. It is located between South Freeport and Mere Point, Brunswick, and is a Focus Area of Statewide Ecological Significance and one of the state's Important Bird Areas.The mouth of Maquoit Bay faces southwest, which results in its becoming a receptacle for nutrients flowing in from Casco Bay. The mixing of these nutrients with the organic material of the bay's salt marshes, a process assisted by the tides and the confluences of surrounding watercourses, creates a rich environment for marine life. On top of the large amounts of shellfish, the bay is also home to thousands of waterfowl, wading birds and shorebirds all year round. Shorebirds, in particular, undertake complete annual migration round trips of up to 20,000 miles, taking them to nesting areas in the Arctic and winter homes in South America, and many hundreds of them stop in Maquoit Bay to rest for the next leg of their journey.