Grace Adelbert Sandhouse (1896–1940)^[1] was an American entomologist.

Sandhouse was raised in Monticello, Iowa.^[2] She attended the University of Colorado, where she graduated in 1920, while working for Theodore Cockerell. Cockerell introduced Sandhouse to apiology, the study of bees. She proceeded to earn a master's from the University of Colorado and a PhD at Cornell University. After graduation she became a Junior Entomologist at the United States Department of Agriculture's Bureau of Entomology, working in the Division of Insect Identification.^[2] She worked there until her death, ending her career as an Associate Entomologist.^[3]

Research wise, Sandhouse focused on taxonomy of Hymenoptera, specifically Apoidea.^[3] She published a monograph on the genus Osmia.^[2] Sandhouse's personal archives are in the collection of the Smithsonian Institution Archives.^[3]

• "New North American species of bees belonging to the genus Halictus (Chloralictus)". Proceedings of the United States National Museum. 65 (19): 1–43. September 9, 1924. ISSN 0096-3801.
• The North American bees of the genus Osmia (Hymenoptera: Apoidea). Washington, D.C.: The Entomological society of Washington (1939)
• "A Review of the Nearctic Wasps of the Genus Trypoxylon (Hymenoptera: Sphecidae)". American Midland Naturalist, Vol. 24, No. 1 (Jul., 1940), pp. 133–176.
• The Type Species of the Genera and Subgenera of Bees. Washington, D.C.: Smithsonian Institution Press (1943)
• The bees of the genus Agapostemon (Hymenoptera: Apoidea) occurring in the United States. Bureau of Entomology and Plant Quarantine (1936)