Ruth Grotenrath (1912–1988) was an influential American painter known for her vibrant and colorful works that often depicted still lifes, florals, and abstract compositions. Born in Milwaukee, Wisconsin, Grotenrath studied at the Milwaukee State Teachers College and the Art Institute of Chicago. She was part of the American Modernist movement and was known for her innovative use of color and form.

Throughout her career, Grotenrath exhibited her work in numerous galleries and museums across the United States, earning recognition and accolades for her contributions to contemporary art. She was married to fellow artist Schomer Lichtner, and together, they became prominent figures in the Milwaukee art scene.

Grotenrath's legacy is marked by her bold artistic style and her dedication to exploring new artistic expressions. Her work continues to be celebrated for its joyous and dynamic qualities, reflecting her passion for creativity and innovation.