Lithgow Public Library

The Kennebec County Courthouse is located at 95 State Street in Augusta, Maine, the state capital and county seat of Kennebec County. Built in 1829 and twice enlarged, it is one of the oldest examples of Greek Revival architecture in the state, and its earliest known example of a Greek temple front. The building, which is now mostly taken up by county offices, was listed on the National Register of Historic Places in 1974.

The All Souls Church is a historic former church building at 70 State Street in Augusta, Maine. Built in 1879, it is one of Maine's finest examples of Stick style architecture. The building was listed on the National Register of Historic Places in 1978.

St. Mark's Episcopal Church was a historic church at 9 Summer Street in Augusta, Maine, just west of downtown. The congregation, founded in 1840, occupied an 1886 Gothic Revival stone building designed by Richard M. Upjohn and listed on the National Register of Historic Places in 1984 for its architecture. The congregation moved out in 2015.

The Fuller-Weston House is a historic house at 11 Summer Street in Augusta, Maine. Built in 1818, it is a fine local example of Federal period architecture, and is further notable for several of its occupants, who include the Chief Justice of the United States Melville Fuller. The house was listed on the National Register of Historic Places in 1984. It now serves as the rectory of St. Mark's Church.

The Dr. J.W. Ellis House is a historic house at 62 State Street in Augusta, Maine. Built in 1855 for a prominent local doctor, it is a fine example of late Greek Revival architecture. It was listed on the National Register of Historic Places in 1979.

The Governor Hill Mansion is a historic house at 136 State Street in Augusta, Maine. It was built in 1901 for John F. Hill to a design by John Calvin Stevens, and is one of the state's grandest examples of Colonial Revival architecture. It now serves as an event facility. It was listed on the National Register of Historic Places in 1977.

The Masonic Hall is a historic commercial and fraternal society building at 313-321 Water Street in downtown Augusta, Maine. Built in 1894, it is a significant work of Boston architect John Spofford, and a good local example of restrained Renaissance Revival architecture. It was listed on the National Register of Historic Places in 1986.

The Old Post Office and Court House is a historic former federal government building at 295 Water Street in downtown Augusta, Maine. Built in 1886-1890, it is one of Maine's finest surviving examples of Romanesque Revival architecture. It was listed on the National Register of Historic Places in 1974.

The South Parish Congregational Church and Parish House is a historic church at 9 Church Street in Augusta, Maine. Built in 1865, the church is a major Gothic Revival work of Maine's leading mid-19th century architect, Francis H. Fassett, and its 1889 parish house, designed by James H. Cochrane, is a rare example in the state of Stick style architecture. The property was listed on the National Register of Historic Places in 1980. The congregation was established in 1773, when the area was part of Hallowell.

The Journal Building (also known as the Gannett Building and Handley Hall) is a historic commercial building at 325-331 Water Street in downtown Augusta, Maine. Built in 1899 to a design by Arthur G. Wing, it is a fine local example of commercial Renaissance Revival architecture. It was for main years home to Augusta's leading newspaper, the Kennebec Journal. It was listed on the National Register of Historic Places in 1986. It is now occupied by facilities of the University of Maine at Augusta.

The Winthrop Street Historic District encompasses a predominantly residential area of Augusta, Maine encapsulating about 100 years of residential home development. The area features high-quality and well-preserved examples of homes from the early 19th to early 20th centuries, as well as two churches and the Lithgow Library. The district occupies a roughly triangular area west of downtown Augusta and north of the state capitol district. It was listed on the National Register of Historic Places in 2001, and enlarged slightly in 2008.

The Doughty Block is a historic commercial building at 265 Water Street in downtown Augusta, Maine. Built in 1890, it is the downtown's only example of a 19th-century high rise. It was listed on the National Register of Historic Places in 1986.