William G. Perry FAIA (1883–1975) was an American architect in practice in Boston from 1915 to 1974. In 1923 Perry was a cofounder of the architectural firm now known as Perry Dean Rogers Architects and is best known for the restoration of Colonial Williamsburg, beginning in 1927.
 William Graves Perry was born November 8, 1883, in Boston to Charles French Perry and Georgianna West (Graves) Perry. He was educated at Harvard University and the Massachusetts Institute of Technology, graduating from the latter in 1907. After a few months with architects Shepley, Rutan & Coolidge he traveled to Paris, where he sat for and passed the entrance examinations to the École des Beaux-Arts. He earned his diplôme in 1913 and returned to the United States. In Boston he returned to Shepley, Rutan & Coolidge while also teaching design at the Boston Architectural Club. In 1915 he formed his own practice. In 1917, upon the United States' entry into World War I, he enlisted in the United States Army, leaving his business in charge of an associate. During the war he was stationed in France and supervised the construction of airfields. He was discharged in 1919, and returned to Boston.
 In 1923 Perry merged his practice with that of T. Mott Shaw and Andrew H. Hepburn, established in 1921, to form the new firm of Perry, Shaw & Hepburn. In 1949 they were joined by partners Christopher M. Kehoe and Robert C. Dean in the renamed Perry, Shaw & Hepburn, Kehoe & Dean. After Kehoe's sudden death in 1952 the firm became Perry, Shaw, Hepburn & Dean. Both Shaw and Hepburn retired in 1962, though it was not until 1968 that the firm was reorganized as Perry, Dean & Stewart with the addition of Clifford D. Stewart. Perry retired from practice in 1974, leaving his partners in charge. The firm was renamed several times until arriving at Perry Dean Rogers Architects, its current (2023) name, in 1982.
 In the 1920s Perry, Shaw & Hepburn emerged as one of the United States' leading designers of Colonial Revival buildings. This led to the commission, in 1927 from John D. Rockefeller Jr., for the restoration of what would become Colonial Williamsburg in Virginia. Perry was chief architect on the Williamsburg project until 1953, and was responsible for the restoration of many buildings and the complete reconstruction of others, including the Capitol and Governor's Palace, both completed in 1934. Other important works in the Colonial style include major buildings for Brown University, Furman University and Harvard University and a major extension to the Jordan Marsh building in Boston. After World War II the firm began completing many Modern buildings, the design of which were usually led by Robert C. Dean, though Perry also embraced, to a degree, the Modern movement.
 Perry joined the American Institute of Architects in 1920 and was elected a Fellow in 1936.
 Perry was married in 1908 to Eleanor Gray Bodine at Villanova, Pennsylvania. They lived in Paris while Perry was attending the Beaux-Arts, and after their return lived in Boston. In 1915 they moved to Medfield, where they associated themselves with local church and civic affairs. They had three children: Eleanor G. Perry (1910–1986), William G. Perry Jr. (1913–1998) and Louise B. Perry (1923–1997). In the 1920s they moved to Brookline, and divorced in 1934. In 1945 he remarried to Frances Adams (McElfresh) Ames. Perry died April 4, 1975, in a nursing home in North Andover, Massachusetts.
 Works in private practice include:
 By the 1970s, the firm of Perry, Shaw & Hepburn and its successors had completed about a thousand projects. Those where Perry had a prominent role include
 Restorations and reconstructions include: