The Keyport Fire Museum shares the history of local firemen and fire fighting, including 19th century equipment and artifacts. This is the county's only museum dedicated to fire history.

Fort Hancock at Sandy Hook was a U.S. Army fort built in 1859 to protect New York Harbor. Located in Gateway National Recreation Area, this former fort featured a gun battery that was later replaced with 6-inch barbette guns.

The Monmouth County Historical Association collects and shares the history of the county. In addition to preserving artifacts, art, and documents, the museum features changing exhibits such as childhood life or Monmouth County in WWII. The association also runs several historic homes in the area ranging from the 18-19th centuries: Covenhoven House, which was involved with the Battle of Monmouth in 1778, Holmes-Hendrickson House, Allen House, Marlpit Hall, and Taylor-Butler House.

Other historic houses in the county include: Stephen Crane House, home of the well-known American author; Eden Woolley House Museum, the home of Ocean Township's first councilman and one of the area's last 18th century homes still standing; Historic Walnford which was once the Waln family farm and grist mill; Historic Longstreet Farm is a living history and working farm designed to teach children and adults about agriculture and farm life in the area.

National Guard Militia Museum of New Jersey will teach visitors all about the guard, its history, and the chance to see a variety of memorabilia and related artifacts. The main museum is located in Sea Girt, while the location in Lawrenceville, outside of Trenton, operates an armory museum full of weapons, vehicles (including tanks), and other military equipment.