Estelle Ishigo (July 15, 1899 – February 25, 1990), née Peck, was an American artist known for her watercolors, pencil and charcoal drawings, and sketches. During World War II she and her husband were incarcerated at the Heart Mountain Relocation Center in Wyoming. She subsequently wrote about her experiences in Lone Heart Mountain and was the subject of the Oscar winning documentary Days of Waiting: The Life & Art of Estelle Ishigo. Ishigo stands out as being one of the few individuals who were not ethnically Japanese incarcerated under Executive Order 9066.