John P. Thomas (March 30, 1886 – August 9, 1944) was an American architect in practice in Portland, Maine.
After his return to Boston, Thomas worked for C. Howard Walker and William Welles Bosworth, before joining the office of Wait & Copeland in 1913.
In 1923 he incorporated the firm under his own name, in association with Murray Crosman Binford and Albert Cyprian Hobbs.
[4][5] Thomas continued in independent practice for almost twenty years, closing his office in late 1941 upon the United States' entry into World War II.
The noted Maine architects Royal Boston Jr. and Josiah T. Tubby both worked for Thomas as drafters and designers.