Jonas Platt (June 30, 1769 – February 22, 1834) was an American lawyer and politician from New York.

[1] Platt was born on June 30, 1769, in Poughkeepsie, Province of New York, in what was then British America.

[3] He attended a French Academy at Montreal, Quebec, studied law, and was admitted to the bar in 1790.

Afterward, he resumed the practice of law and served as a general in the Cavalry in the New York State Militia.

[4] Together, Jonas and Helena were the parents of eight children, including:[4] Platt died on February 22, 1834, in Peru, Clinton County, New York.