| Thomas McKeen Chidsey | |
| Office: | Associate Justice of the Supreme Court of Pennsylvania |
| Termstart: | July 6, 1950 |
| Termend: | April 19, 1958 |
| Office2: | Attorney General of Pennsylvania |
| Termstart2: | January 21, 1947 |
| Termend2: | July 5, 1950 |
| Governor2: | James H. Duff |
| Predecessor2: | James H. Duff |
| Successor2: | Charles J. Margiotti |
| Birth Date: | 26 January 1884 |
| Birth Place: | Easton, Northampton County, Pennsylvania, Pennsylvania |
| Death Place: | Philadelphia, Pennsylvania |
| Party: | Republican |
| Spouse: | Ellen Lea |
| Children: | 2 |
| Alma Mater: | Lafayette College, University of Pennsylvania Law School |
| Occupation: | Judge, lawyer |
Thomas McKeen Chidsey (January 26, 1884April 19, 1958) was a Pennsylvania lawyer and judge. He served a term as the state's Attorney General, and was an associate justice of the state's Supreme Court.
Chidsey was born the son of Andrew Dwight and Emily McKeen Chidsey. He was admitted to the bar in 1907. In 1913, he married Ellen Lea, and they had two daughters.
He was District Attorney for Northampton County, 1920 - 23. He was appointed Attorney General in 1947. He was appointed in 1950 to fill a vacancy on the state's Supreme Court, and was then elected to a full 21-year term. He died in 1958.[1]