Sarah Anne Worthington King Peter (10 May 1800, Chillicothe, Ohio - 6 February 1877, Cincinnati) was an American philanthropist and patron of the arts.

Her father, Thomas Worthington, was Governor of Ohio, from 1814–18, and also served in the United States Senate.

Following Edward King's death, she moved to Cambridge, Massachusetts to be near two of her children attending Harvard.

Sarah Peter became a Catholic convert at Rome in March, 1855, being instructed there by Gaspard Mermillod.

In 1862, she volunteered as a nurse, and went with the sisters who followed General Grant's army in the southwest after the Battle of Pittsburg Landing.