The museum of the Westerly Armory displays both community and military memorabilia in order to preserve community, state, and national history. The Armory itself is an artifact, built in 1901–02 and designed by the firm of William R. Walker and Son. It was the second Walker armory, following Pawtucket.

The museum offers tours, exhibits, and occasional recreational and educational events.

The Redwood Library and Athenæum is the oldest lending library in America, and the oldest library building in continuous use in the country. Founded in 1747 by 46 proprietors upon the principle of "having nothing in view but the good of mankind," its mission continues over 250 years later.

The library offers tours, exhibits, and all standard library services (including recreational and educational events, though not focused specifically on history).

The Society's Museum, housed in the 1865 Christian Union Church, displays exhibits related to local history. The Society also operates the 1725 Southermost Schoolhouse and the 19th-century Old Town Hall.

The museum offers exhibits and research library access; the Old Town Hall offers exhibits.

The Maxwell House was built between 1752 and 1756 by the Reverend Samuel Maxwell. The house, which is the oldest brick dwelling in Warren, is distinguished by the distinctive Flemish bond pattern of the brickwork, its field stone foundation, and its large central chimney. The Maxwell House is maintained by the Society as a working museum.

The house offers tours, educational programs, and occasional recreational and educational events.

The Birthplace serves as a showplace for reproductions of the works of one of America's foremost portrait painters and as an authentically restored and furnished workingman's home and the site of the first snuff mill in America. The wooded homestead on the banks of the Mattatuxet Brook also features a partially restored grist mill and a fish ladder. In spring the ladder is packed with migrating herring, swimming furiously to reach the pond above the mill dam. The grist mill houses the original fine-grained granite stones used to grind corn for the famous Rhode Island Johnny Cakes.

The site offers tours and occasional recreational and educational events.

Built by Eleazor Arnold in 1693, the Arnold House is a rare surviving example of a "stone-ender," a once common building type first developed in the western part of England.

The house offers tours and educational programs.

Built by Richard Clemence in 1691, the Clemence-Irons House is a rare surviving example of a "stone-ender," a once-common building type first developed in the western part of England.

The house offers tours.

Before European settlement, Native Americans planted their crops of corn and beans on Conanicut Island overlooking Narragansett Bay. In 1789, Job Watson purchased a piece of this rich farmland, and for the next two centuries, five successive generations of the Watson family cultivated the land, changing their crops and practices as needed to adapt to the evolving market. Today, the property is still a working family farm. The farmers raise cattle and sheep for beef, lamb, and wool markets; grow acres of grass for winter hay supplies; make compost for fertilizer; and cultivate a large vegetable garden. The 1796 house, still used as the farmers' residence, is not open to the public. Visitors are welcome to explore the farmland on their own, following a self-guided walking tour. Educational programs and group tours are available by appointment.

The farm offers tours and educational programs.

This mid-18th-century homestead overlooking Narragansett Bay was the center of a plantation that produced food for local and foreign markets. Located near Newport, Casey Farm had access to material goods imported from England, enabling its early owners to live in a fashionable manner. Today, resident farm managers raise organically grown vegetables, herbs, and flowers for subscribing households in a Community Supported Agriculture program. The guided tour includes the farmyard and cemetery, where six generations of Caseys are buried.

The farm offers tours and educational and recreational programs.

The Artillery Company of Newport operates a military museum in its Armory. The Museum houses one of the country's most extensive collections of military uniforms and memorabilia, including uniforms worn by His Royal Highness Prince Phillip; Lord Louis Mountbatten; Field Marshal Sir Bernard Montgomery of Alamein; President Anwar Sadat of Egypt; Fleet Admiral Chester Nimitz; Generals of the Army Dwight Eisenhower and Mark Clark; Generals William Westmoreland, Creighton Abrams, and Alexander Haig; and Secretary of State Colin Powell, as well as other American commanders. The Museum collection also includes four bronze cannon cast by Paul Revere in 1798 for the State of Rhode Island, three Civil War artillery pieces, a letter written to the men of the Artillery Company in 1794 by George Washington, and a Gilbert Stuart portrait of Washington, as well as numerous artifacts of particular significance to the history of the State of Rhode Island and the Artillery Company of Newport.

The museum offers exhibits.