James Charles Castle (1899–1977) was an American artist born in Garden Valley, Idaho. Although Castle did not know about the art world outside of his small community, his work ran parallel to the development of 20th Century art history.
Castle was a self-taught artist who created drawings, assemblage and books throughout his lifetime. Castle was born profoundly deaf and it is not known to what extent he could read, write, or use sign language. Castle's artworks were created almost exclusively with found materials such as papers salvaged from common packaging and mail, in addition to food containers of all types. Castle fashioned his own ink using soot from the woodstove and applied it with tools of his own making, including sharpened sticks, and other found objects.