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The Tuttle Farm of Dover, New Hampshire, United States, is located between the tidal waters of the Bellamy and Piscataqua rivers on Dover Point, and has been operating continuously since 1632.Tuttle Farm, now known as Tender Crop, has often been referred to as having been the oldest known family-owned farm in the United States; however, this claim has been challenged. The Shirley Plantation in Charles City, Virginia, was founded in 1613 and has been in operation since 1638.

The Dover Religious Society of Friends Meetinghouse is a historic Quaker meeting house at 141 Central Avenue (New Hampshire Route 108) in Dover, Strafford County, New Hampshire. Built in 1768 for a congregation established in the 17th century, it is the only surviving 18th-century Quaker meetinghouse in the state. The building was listed on the National Register of Historic Places in 1980.

The Woodman Institute Museum is located at 182 Central Avenue in Dover, New Hampshire, United States. It is a museum dedicated to history, science and the arts. It was created in 1915 with a bequest of $100,000 from philanthropist Annie Woodman to encourage her city's education in those three fields. The institute opened on July 26, 1916. Under the name of "Woodman Institute", the museum was listed on the National Register of Historic Places in 1980.

The First Parish Church is a historic church at 218 Central Avenue in Dover, New Hampshire. The church was designed and built by Captain James Davis in 1825, inspired by the Federal style designs of Charles Bulfinch, Asher Benjamin, and Alexander Parris. It is the fifth home to a parish that was first gathered in 1633 at Dover Point. The church was added to the National Register of Historic Places in 1982. The congregation is affiliated with the United Church of Christ.

The Sawyer Building is a historic commercial building at 4-6 Portland Street in Dover, New Hampshire. The three-story brick structure was built in 1825, during Dover's period of economic prosperity following the establishment of its textile mills. It is one of Dover's oldest commercial buildings. The building was listed on the National Register of Historic Places in 1980.

The Cocheco Mills comprise a historic mill complex in the heart of Dover, New Hampshire. The mills occupy a bend in the Cochecho River that has been site of cotton textile manufacturing since at least 1823, when the Dover Manufacturing Company supplanted earlier sawmills and gristmills. The present mill buildings were built between the 1880s and the early 20th century, and were listed on the National Register of Historic Places in 2014.

The Samuel Wyatt House is a historic house at 7 Church Street in Dover, New Hampshire. Built in 1835, it is one of the city's best-preserved examples of Greek Revival architecture, and was home to a prominent businessman and educator. The house was listed on the National Register of Historic Places in 1982.

The Sawyer Woolen Mills is a historic textile mill complex at 1 Mill Street in Dover, New Hampshire. Built in stages between 1873 and 1939, the mill complex is one of New Hampshire's most intact mill complexes, reflecting multiple architectural styles which were retained by addition to the complex rather than by the demolition of older buildings. The mills were listed on the National Register of Historic Places in 1989.

The Michael Reade House is a historic house at 43 Main Street in Dover, New Hampshire. Built about 1780 for a prominent local merchant, it is one of the city's few surviving 18th-century buildings. It was listed on the National Register of Historic Places in 1980. It now houses professional offices.

St. Thomas Episcopal Church is an historic Episcopal church located at 5 Hale Street in Dover, New Hampshire, in the United States. Founded in 1839, its building, designed by English architect Henry Vaughan, is an important example of his work, and was listed on the National Register of Historic Places in 1984.

The William Hale House is a historic house at 5 Hale Street in Dover, New Hampshire. Built in 1806, it is one of the few early houses in southeastern New Hampshire for which the architect is known with certainty. It is also the only definitively known work of that architect, Bradbury Johnson, who had a reputation for craftsmanship across the state's Seacoast Region. The house was listed on the National Register of Historic Places in 1980. It presently serves as the parish house for the adjacent St. Thomas Episcopal Church.

Dover is a city in Strafford County, New Hampshire, United States. The population was 32,741 at the 2020 census, making it the largest city in the New Hampshire Seacoast region and the fifth largest municipality in the state. It is the county seat of Strafford County, and home to Wentworth-Douglass Hospital, the Woodman Institute Museum, and the Children's Museum of New Hampshire.