Nannine Jane "Nan" Quick Sheets was an American painter, printmaker, and museum director. It has been said that she, along with Oscar Jacobsen, created the artistic community in central Oklahoma.
Born in Albany, Illinois, Sheets graduated in 1905 from the School of Pharmacy at Valparaiso University. She then moved to Salt Lake City, working as a prescription clerk while studying art in her free time. In 1910 she married Fred C. Sheets, a physician who had formerly been a classmate, and moved with him to Oklahoma, living in Bartlesville and Muskogee before settling in Oklahoma City in 1916. She began taking summer classes with John F. Carlson at the Broadmoor Academy of Fine Arts in Colorado Springs in 1919, earning a special prize in landscape. Other teachers over her career included Hugh Breckenridge, Kathryn E. Cherry, Nellie Knopf, Robert Lewis Reid, Birger Sandzen, Abbott Handerson Thayer, and Everett Warner.
Sheets turned her home in Oklahoma City, "The Elms", into a salon for local and visiting artists. Every summer she traveled and painted, offering her work for sale upon her return.