Rosa Winifred Nicholson (née Roberts, 1893-1981) was a British painter.
She was married to the painter Ben Nicholson, and was thus the daughter-in-law of the painter William Nicholson and his wife, the painter Mabel Pryde.
She was the mother of the painter Kate Nicholson.
Winifred Nicholson was a colourist who developed a personal impressionistic style, concentrating on domestic still life objects and landscapes.