This is a list of the buildings, sites, districts, and objects listed on the National Register of Historic Places in Guam. There are currently 134 listed sites spread across 17 of the 19 villages of Guam. The villages of Agana Heights and Mongmong-Toto-Maite do not have any listings. Listed historic sites include Spanish colonial ruins, a few surviving pre-World War II ifil houses, Japanese fortifications, two massacre sites, and a historic district. Two other locations that were previously listed have been removed from the Register.

The Agat World War II Amtrac is an underwater relic of World War II, located off Ga'an Point in Agat Bay on the west side of the island of Guam. It is the remains of an LVT 4, an amphibious tracked landing vehicle. It is located about 500 yards (460 m) off Agat Invasion Beach in 45 feet (14 m) of water, and was described as being in good condition when it was discovered and surveyed in 1985. These vehicles were used during the 1944 Battle of Guam, in which American forces recaptured the island from occupying Japanese forces. This particular vehicle does not appear to exhibit significant war damage. This is the most intact of the three Amtracks remaining on Guam from the 850 that participated in the battle. It was re-surveyed by maritime archaeological field schools conducted from 2009 to 2012.