Mehdi Behzad (Persian:مهدی بهزاد; born April 22, 1936) is an Iranian mathematician specializing in graph theory.

Behzad is the coauthor of two text books on graph theory published in 1972 and 1979 in the U.S.,[7][8] which were among the key references on this new field of mathematics.

He was a Senior Fulbright Scholar at Michigan State University and Massachusetts Institute of Technology (MIT) in the academic year 1974–75, where his research was supported by U.S. National Academy of Sciences.

Behzad has played an important role in institutionalizing and advancement of basic sciences in his home country of Iran.

In recognition of his executive contributions during his lifetime, the Iranian Mathematical Society (Persian: انجمن‌ رياضى‌ ‌اير‌ان‌) has established the Dr. Mehdi Behzad's Award (Persian: جایزه‌ی دکتر مهدی بهزاد), an annual multinational award for recognition of individuals with outstanding leadership role in advancement of mathematics in their respective countries.