Thomas Clowes (August 5, 1791 Marblehead, Essex County, Massachusetts - April 9, 1866) was an American lawyer and politician from New York.
In 1808, he went to live with an uncle, who had settled in Brunswick, Rensselaer County, New York, with the promise of becoming heir to his property.
After the death of his uncle, he went to the county seat Troy, New York, to settle the estate, but eventually remained there and studied law at the office of Ross & McConihe.
On July 6, 1818, he married Nancy Cox, but of their children only one daughter reached maturity.
However, on November 1, 1847, Commissioner Nathaniel Jones resigned, and Clowes was elected by the New York State Legislature on November 15 to fill the vacancy, and remained in office for six weeks, until the end of the year.