Oresto DiSaia (1900–1976) was an Italian-American architect from Providence, Rhode Island.
After his 1917 graduation he joined the firm of F. P. Sheldon & Son, mill architects and engineers.
In 1946 DiSaia was appointed state Director of Public Works by Governor John O. Pastore.
In 1950 he was chair of the Legislative Commission on Highway Planning, and in 1973 he was appointed to the Building Codes Standards Committee by Governor Philip W. Noel.
[3] At one time or another he held every office in the Rhode Island chapter, including president.