Sophia of Rheineck, also known as Sophie of Salm, Countess of Bentheim (c. 1120 – 26 September 1176 in Jerusalem) was a ruling suo jure Countess of Bentheim between 1150 and 1176. She was also countess consort of Holland by marriage to Dirk VI, Count of Holland, who were her co-ruler jure uxoris in the County of Bentheim.