Delbert Harold McNamara, Ph.D. (June 28, 1923 - January 9, 2014[2]) was an American astronomer at Brigham Young University and an internationally recognized authority in intrinsic variable and eclipsing binary stars.

His dissertation was entitled "A Two Color Photometric Study of the Eclipsing Variable, YZ Cassiopeia".

In 1955, he joined Brigham Young University as the first faculty member whose training was primarily in the field of astronomy.

[6] In 2000 McNamara received the George Van Biesbroeck Prize by the American Astronomical Society for "long-term extraordinary or unselfish service to astronomy".

[3] McNamara served in the United States Navy during World War II (1943–1946) and retired as a Lieutenant JG.