Frank K. Edmondson (born August 1, 1912) is an American astronomer.

Edmondson was born in Milwaukee, Wisconsin and grew up in Seymour, Indiana. He graduated from Indiana University in 1933 and received a fellowship to work at Lowell Observatory in Flagstaff, Arizona, where he stayed until 1935, working as an observing assistant to Clyde Tombaugh, discoverer of the planet Pluto. After earning his Ph.D. at Harvard University in 1937, Edmondson returned to Indiana University as a faculty member in the department of astronomy. In 1944, he become the department's chairman, a position he held until 1978.

An early accomplishment of Edmondson's was the creation of a photographic program to locate asteroids that were "lost" when systematic observations were interrupted by World War II. He also negotiated the donation of the privately-owned Goethe Link Observatory near Brooklyn, Indiana to Indiana University. Nearly 7000 astrographic plates for asteroid orbit studies were taken with a 10-inch astrographic camera at the Goethe Link Observatory. These plates are now archived at Lowell Observatory.

In addition to pursuing studies in stellar kinematics, galactic structure, asteroid astronometry and the history of astronomy, Edmondson served as Program Director for Astronomy of the National Science Foundation (1956-1957), treasurer of the American Astronomical Society (1954-1975) and statistical advisor to Dr. Alfred Kinsey during his studies of human sexuality. He also advised in the development and site selection of the National Optical Astronomy Observatories, which include the Kitt Peak National Observatory in Arizona, the Cerro Tololo Inter-American Observatory in Chile and the National Solar Observatory in New Mexico. He was also instrumental in creating the Association of Universities for Research in Astronomy (AURA), a consortium of seven universities that manages the three observatories plus the Space Telescope Science Institute which directs research with the Hubble Space Telescope. He was AURA's president from 1962 to 1965. He was a member of the Minor Planet Commission of the International Astronomical Union (IAU), and was its president from 1970 to 1973. He was chairman of the United States National Committee of the IAU from 1963 to 1964.

Since his retirement from Indiana University in 1983, Edmondson has devoted himself to compiling histories of AURA and the Indiana University astronomy department. The asteroid 1761 Edmondson is named for him.

Book

AURA and its US National Observatories, Cambridge University Press, 1997. ISBN 0-52155-345-8