| State: | New York |
| District: | 2nd |
| Term Start: | March 4, 1813 |
| Term End: | March 3, 1815 |
| Predecessor: | William Paulding, Jr. Samuel L. Mitchill |
| Successor: | William Irving Peter H. Wendover |
| Birth Date: | 4 April 1771 |
| Birth Place: | Westbury, Province of New York, British America |
| Death Place: | New York City, New York, U.S. |
| Alma Mater: | Columbia College |
| Party: | Federalist |
| Parents: | Jotham Post Sr. Winifred Wright Post |
| Spouse: | |
| Relations: | Wright Post (brother) Henry A. V. Post (grandson) Gertrude Rhinelander Waldo (granddaughter) |
Jotham Post Jr. (April 4, 1771 – May 15, 1817) was a U.S. Representative from the state of New York, United States.
Post was born near Westbury, New York on April 4, 1771. He was the son of Jotham Post Sr. (1740–1817), with whom he was very close, and his wife, Winifred (née Wright) Post (1745–1811). His older brother was Dr. Wright Post, a professor of surgery and anatomy at Columbia.
He graduated from Columbia College in New York City, in 1792.
He studied medicine, but did not practice, instead, he engaged in the drug-importing business in New York City. He served as member of the board of aldermen. He served in the State assembly 1795 and 1805–1808.[1] He served as director of the New York Hospital from 1798 to 1802.[2]
Post was elected as a Federalist to the Thirteenth Congress, serving from March 4, 1813 to March 3, 1815.
On August 10, 1792, Post was married to Magdalena Blaau in New York City. Together, they had eight children, including:[3]
After the death of his first wife in 1811, Jotham married Julia Strong on October 2, 1815 in Albany, New York. She was the widow of George Wattles.[3]
Post died in New York City, May 15, 1817.[4]
Notable descendants include Henry A. V. Post, Albertson Van Zo Post, Henry Post, journalist Robert Post, Regis Henri Post, Mason Sears, and Gertrude Rhinelander Waldo, and Rhinelander Waldo.