Ebenezer Alden House

Union is a town in Knox County, Maine, United States. The population was 2,383 at the 2020 census. It is home to the Matthews Museum of Maine Heritage and annual Union Fair.

The Common is the town common of Union, Maine. Laid out about 1790 and acquired by the town in 1809, it is the oldest public town common in the state of Maine. It is the site of the town's various war and veterans memorials, and also has a bandstand. It was listed on the National Register of Historic Places in 2007.

The Old Town House, also known as the Union Town House, is a historic government building at 128 Town House Road in Union, Maine. Built in 1840, it served the town for many years as its town hall, and as one of its major social venues. It is now owned by the local historical society, which operates it as a community meeting place. It was listed on the National Register of Historic Places in 2001.

The Joseph and Hannah Maxcy Homestead is a historic house at 630 South Union Road (Maine State Route 131) in South Union, Maine. Built in 1802 by Ebenezer Alden, a regionally well-known housewright, it is one of the finest period examples of Federal architecture, with high-quality interior woodwork. It was listed on the National Register of Historic Places in 2004.

The Union Fair is an annual agricultural fair in Union, Maine. It began in 1869 and, since 1886, all fairs in Knox County have taken place in Union.No fair was held in 1917–18, 1942–45 nor 2020. For many years the fair started on the third Saturday before Labor Day and run for eight days closing on the following Saturday. The fair now takes place in late July.

The Lermond Mill, now also known as Morgan's Mill, is a historic mill complex on Payson Road in Union, Maine. With a history dating to the late 18th century, and its present buildings from the early 19th century, it is one of the oldest operational water-powered mills in the state of Maine. It was listed on the National Register of Historic Places in 1984. As of 2006, it was reported to be in use for power generation and as a grist mill. The mill is located in the village of East Union, and is set astride Mill Stream, the outlet of Lermond Pond, on the south side of Payson Road. The mill complex consists of two vernacular wood frame buildings, with gable roofs and shingle siding, joined by a single-story shed. They are separated from the road by a mill pond lined with granite blocks. The industrial history of the site dates to 1795, when John Lermond arrived in Union. He built the dam that created Lermond Pond, and established a water-powered pit saw mill on the site. In 1803 he built the older of the two building sections of the present mill, and began operating a grist mill. The other main building section was added in 1825, and housed a woodworking operation, in which chairs, caskets, and barrel staves were produced. In 1871 the larger building was converted to textile making, and in 1897 the complex was used as a granite stone finishing operation. In 1928 the main waterwheel was replaced by a turbine. Mill operations ended in 1972, but were restarted in 1978. The mill has since been used to produce electricity, and for the grinding of grain. It is one of the state's oldest operational water-powered mills.

The Back River is a tributary of the Saint George River in Knox County, Maine. From its source in Far Meadow (44°02′53″N 69°16′08″W) in Cushing, the river runs 10.7 miles (17.2 km) north, through South and North Ponds, to its confluence with the Saint George in Warren.

The Gushee Family House is a historic house at 2868 Sennebec Road in Appleton, Maine. Built about 1833 and remodeled in 1891, it is a well-preserved early rural Maine farmstead, with a well-preserved main entry surround that is unusually elaborate for the house's scale, but is also common to other period houses in the region. The house was listed on the National Register of Historic Places in 1998.

The Union Meeting House is a historic church at 2875 Sennebec Road in Appleton, Maine. Built in 1848, it is a fine local example of Greek Revival architecture. It has served a variety of congregations, and housed the town library for a time. It is now owned by the local historical society. It was listed on the National Register of Historic Places in 2014.

Appleton is a town in Knox County, Maine, United States. It is about 15 miles inland from Penobscot Bay and coastal towns such as Camden and Rockland, about 30 miles east of the state capital of Augusta. The population was 1,411 at the 2020 census.

The Georges River Canal, also known as the General Knox Canal was a short-lived canal that operated on and near the course of the Saint George River in Knox and Waldo Counties in south-central Maine. First owned and operated by American Revolutionary War General Henry Knox between 1794 and 1806, it was briefly revived in 1847–50, but was not financially successful. It provided for transport of goods from near the river's headwaters in Searsmont to the head of navigation at Warren. A few elements of the canal survive today, and its route was listed on the National Register of Historic Places in 1970.

Warren is a town in Knox County, Maine, United States. The population was 4,865 at the 2020 census. It includes the villages of East Warren, Warren and South Warren, the latter home to the Maine State Prison and minimum security Bolduc Correctional Facility.