Agnes Josephine Straub (2 April 1890 – 8 July 1941) was a German film actress.

From 1925 onwards Straub mainly worked with her husband, the actor and director Lionel Royce.

In 1934, Royce was banned from working due to being a Jew, and left for Vienna, where he changed his name and achieved great success and very favorable reviews in the nationalist press.

When his identity was revealed, a scandal broke out and Royce had to leave Austria and emigrate to America.

Meanwhile, Straub remained in Germany and, in 1938, was involved in a serious car accident that ended her career.