Ruth Doerschuk Dicker (March 9, 1919 - December 2, 2004) was a California painter of landscapes.

Dicker was born in Niagara Falls, New York. She attended the College of William and Mary where she received a degree in painting and art history. She moved to New York City where she worked as an illustrator and fashion model, and met her husband. They soon moved to Palo Alto, California where they raised two sons. In 1970, Dicker moved to Santa Rosa, California where she would find her true style in depicting the landscapes of Sonoma County.

Throughout her career, her work was shown in galleries, museums, corporate offices in New York City and in and around the San Francisco Bay area. She participated in one woman or group shows at the Legion of Honor, the Oakland Museum of California, Santa Clara University, and Stanford University.

Her most well-known paintings are likely the large paintings depicting the seasons in the dining room of The Nut Tree (now closed) in Vacaville, California.