| Lewis F. Castor Jr. | |
| Office: | Member of the Pennsylvania House of Representatives for the 17th Philadelphia County District |
| Term Start: | 1935 |
| Term End: | 1937 |
| Predecessor: | Sheppard H. Royle |
| Successor: | Henry M. Dubbs Jr. |
| Party: | Republican |
| Birth Date: | 6 July 1890 |
| Birth Place: | Philadelphia, Pennsylvania, U.S. |
| Death Place: | Philadelphia, Pennsylvania, U.S. |
| Restingplace: | William Penn Cemetery Philadelphia, Pennsylvania, U.S. |
| Occupation: | General contractor |
Lewis Frank Castor Jr. (July 6, 1890 – May 22, 1958) was an American businessman who served one term in the Pennsylvania House of Representatives.
Castor was born on July 6, 1890, in Philadelphia. He worked as a general contractor and was the financial secretary of the Frankford Yellow Jackets.[1] He was a director of the poor for the city of Philadelphia from 1921 to 1933 and was elected to the Pennsylvania House of Representatives in 1934. He did not run for reelection in 1936. He died on May 22, 1958, in Philadelphia.[2]