Three Andover buildings are listed on the U.S. Park Service's National Register of Historic Places:
1. Merrill-Poor House, located on State Route 120 about 1/2 mile east of Andover Village, listed May 17, 1976
2. Andover Public Library, located on Church Street, listed January 27, 1981
3. Andover Hook and Ladder Co. Building, located at 39 Elm Street, listed January 11, 2001
Source: National Park Service National Register of Historic Places, http://www.nr.npr.gov/iwisapi/explorer.dll/x2_3anr2_3aNRISI/script/report.iws