Julian Cleveland Smith (October 7, 1878 – June 24, 1939) was a Canadian engineer and business executive originally from the United States.

Although his twin brother died in January 1897, Smith continued his studies and received his degree in mechanical engineering, with electrical option in 1900.

[2] The 1900 Cornell yearbook describes him as a discreet and studious young man who had military ambitions before he chose to put his energies into his electrical engineering program.

[3] After he graduated, he worked as an industrial designer for a manufacturing company and for the Pan-American Exposition which took place in Buffalo in 1901.

In 1928, he was president of the Engineering Institute of Canada, and he was named as a governor (member of the board of directors) of McGill University in 1931.