| Office: | New York State Treasurer |
| Term Start: | 1813 |
| Term End: | 1817 |
| Predecessor: | David Thomas |
| Successor: | Gerrit L. Dox |
| Birth Name: | Charles Zephaniah Platt |
| Birth Date: | 22 July 1773 |
| Birth Place: | Poughkeepsie, New York |
| Death Place: | Greenbush, Rensselaer County, New York |
| Party: | Federalist |
| Parents: | Zephaniah Platt Mary Van Wyck Platt |
| Children: | 6 |
| Relations: | Jonas Platt (brother) Zephaniah Platt (nephew) |
Charles Zephaniah Platt (July 22, 1773 – April 14, 1822) was an American politician.
Platt was born on July 22, 1773, in Poughkeepsie, New York. He was one of twelve children born to Mary Van Wyck Platt (1743–1809) and Zephaniah Platt (1735–1807), a politician and lawyer who founded Plattsburgh, New York. Among his siblings was brother Judge Jonas Platt.[1]
Through his brother Jonas, he was the uncle of Zephaniah Platt, the Attorney General of Michigan.[2]
He was a member of the New York State Assembly (Oneida Co.) in 1807, and as a Federalist, was New York State Treasurer from 1813 to 1817.[3]
On October 4, 1803, he married Sarah Bleecker (1785–1832) at the Dutch Reformed Church in Albany, New York.[4] Sarah was the daughter of James Bleecker and Rachel (née Van Zandt) Bleecker.[5] Together, they were the parents of six children.[6]
Platt died on April 14, 1822, in Greenbush,[7] Rensselaer County, New York.