List of Masonic buildings in the United States
List of Masonic buildings in the United States identifies notable Masonic buildings in the United States. These have served as meeting halls by Masonic lodges, Grand Lodges or other Masonic bodies. Many of the buildings were built to house Masonic meetings and ritual activities in their upper floors, and to provide commercial space below. Many of the buildings listed have received landmark status, either by being listed on the National Register of Historic Places (NRHP) or listed by various State or City preservation agencies. In 2021, more than 400 Masonic buildings are  listed here. KEY California. Masons in California grew from 258 members in 1850 to over 63,000 in 1918, declining to 46,000 in 2019. Massachusetts. Boston has been the site of several significant Masonic buildings. Also in Massachusetts: Puerto Rico. List of masonic buildings in Puerto Rico, an insular area of the United States, include: