Biddeford–Saco Mills Historic District

Biddeford Main Street Historic District is an historic district in downtown Biddeford, Maine, USA. It encompasses the heart of the city's civic and commercial business district, extending along Main and Water Streets between Pike and Elm Streets, extending for short distances along several side streets. It is noted for its collection of late 19th and early 20th century commercial brick and masonry architecture. The district was added to the National Register of Historic Places in 2009.

The Old Post Office is a historic former post office building at 35 Washington Street in Biddeford, Maine. Built in 1914, it is a fine local example of Classical Revival architecture, and a prototype for post offices built in the following decades. The property was listed on the National Register of Historic Places in 1973. It now houses commercial offices.

Biddeford City Theater is a year-round near 500-seat, restored Victorian opera house at 205 Main Street in Biddeford, Maine, United States. Biddeford City Theater is a non-profit, volunteer-driven, organization that produces and hosts plays, musicals, concerts, movies, music, comedy, and other artistic performances with patrons from all over New England. The mission of City Theater Associates is to foster an appreciation for the performing arts by using creative avenues to increase community involvement. City Theater is part of the Biddeford City Hall complex, designed by Maine architect John Calvin Stevens in 1895. The building is included on the National Register of Historic Places, and is a contributing element to the Biddeford Main Street Historic District.

McArthur Public Library is a public library in Biddeford, Maine. It opened in October 1863 as a department within Biddeford City Hall, and has been in its current location since 1902. It is one of the oldest tax-supported libraries in New England, and the oldest in the state of Maine.

The Dudley Block is a historic mixed-use commercial and residential building in at 28-34 Water Street in downtown Biddeford, Maine. Built in 1848, it is one of the older buildings in the downtown area, and is a fine example of Greek Revival commercial architecture. It was listed on the National Register of Historic Places in 1982, and was included in the Biddeford Main Street Historic District in 2009.

St. Joseph's School is a historic former school building on Birch Street in Biddeford, Maine. Built in 1887, it was one of the first large masonry schools to be built in the state, and became a focal point for the migration of French Canadians into the state. It was listed on the National Register of Historic Places in 1983. It has been converted to residential use.

The Emery School is an historic former school building at 116 Hill Street in Biddeford, Maine. Built in 1912-13 to a design by Miller & Mayo of Portland, it is historically significant for its role the city's education, and architecturally as a fine example of a "modern" elementary school building of the period. It was listed on the National Register of Historic Places on November 18, 2011. The building has been converted to residential housing units.

St. Andre's Parish is a former parish of the Roman Catholic Diocese of Portland, located on Bacon and Sullivan Streets in Biddeford, Maine, USA. The parish was founded in 1860 to serve the city's large French-Canadian and French-American communities. On July 1, 2008, St. Andres was merged into the newly formed Good Shepherd Parish. The parish complex of four buildings, including the church, rectory, convent and school, was listed on the National Register of Historic Places in 2015, at which time most of it stood vacant.

Saint Joseph's Church is one of the 5 churches of Good Shepherd Parish located at 178 Elm Street in Biddeford, Maine, and is the tallest building in Maine.

Saco Transportation Center, also referred to as Saco or Saco–Biddeford in some timetables, is a passenger transportation station in Saco, Maine, served by Amtrak, the national railroad passenger system, and other transportation providers. On average, about 110 passengers daily board or alight Amtrak's Downeaster service at the station, making it the third-busiest stop in Maine. The station is located next to the Pan Am Railways mainline, formerly the Western Route mainline of the Boston & Maine Railroad. The train platform was constructed in 2001, and the station building was constructed in 2008 and opened in 2009. The station, at 138 Main Street, is owned by the City of Saco. The station is notable for being the first green design train station in the U.S. When it was built, it featured a wind turbine for electricity, geothermal heating and cooling systems, and a roof made from recycled soda bottles; however, the wind turbine, which cost the city about $200,000, did not produce the expected amount of electricity, and was shut down in 2006 after safety concerns. It was removed in November 2018.

The Jacobs Houses and Store are a collection of three Federal-period historic buildings at 9-17 Elm Street in Saco, Maine. Built between 1820 and 1826, there are two similar wood-frame houses and a large brick commercial building, all associated with the Jacobs family, local businessmen. The buildings were listed as a group on the National Register of Historic Places in 1982.

The A. B. Seavey House is a historic house at 90 Temple Street in Saco, Maine. Built in 1890, it is one of the city's finest examples of Queen Anne architecture. It was listed on the National Register of Historic Places in 1978.