| Jacob Kerlin McKenty | |
| Office1: | Member of the United States House of Representatives from Pennsylvania's 9th congressional district |
| Term Start1: | December 3, 1860 |
| Term End1: | March 3, 1861 |
| Predecessor1: | John Schwartz |
| Successor1: | Sydenham Elnathan Ancona |
| Office2: | District Attorney of Berks County, Pennsylvania |
| Term Start2: | 1856 |
| Term End2: | 1859 |
| Predecessor2: | Jeremiah Hagenman |
| Successor2: | James B. Bechtel |
| Birth Date: | 19 January 1827 |
| Birth Place: | Douglassville, Pennsylvania, U.S. |
| Death Place: | Douglassville, Pennsylvania |
| Resting Place: | St. Gabriel’s Episcopal Church Cemetery, Douglasville, Pennsylvania |
| Party: | Democratic |
| Education: | Yale College Yale Law School |
| Profession: | Attorney |
Jacob Kerlin McKenty (January 19, 1827 – January 3, 1866) was an American attorney and politician. A Democrat, he was most notable for his service as a member of the U.S. House of Representatives from Pennsylvania.
Jacob K. McKenty was born in Douglassville, Pennsylvania on January 19, 1827, the son of Henry McKenty and Eleanor (or Elenor) McKenty. He graduated from Yale College in 1848 and Yale Law School in 1850.
He completed his studies by reading law with William Strong, was admitted to the bar in 1851 and commenced practice in Reading, Pennsylvania. He served as prosecuting attorney of Berks County, Pennsylvania from 1856 to 1859.
McKenty was elected as a Democrat to the Thirty-sixth Congress to fill the vacancy caused by the death of John Schwartz and served from December 3, 1860 to March 3, 1861. He was not a candidate for reelection in 1860, and resumed the practice of his profession in Reading. He was an unsuccessful candidate for the Democratic nomination for Congress in 1862 and 1864.
McKenty died in Douglassville on January 3, 1866, and was buried at St. Gabriel's Episcopal Church Cemetery in Douglasville.