Thomas Clark Brinsmade (June 16, 1802 – June 22, 1868), sometimes misspelled Brimsmade, was a physician in Troy, New York, who was the sixth president of Rensselaer Polytechnic Institute.
After the deaths of Stephen Van Rensselaer (1839) and Amos Eaton (1842), when the Rensselaer School was in dire need of funds, Brinsmade bought the entire property and equipment of the school at an auction.
In 1858, as vice-president, he delivered an address on the registration of diseases, and furnished the society an accurate record of his practice for twenty-one years, carefully analyzed and tabulated, covering three hundred pages of the published transactions, and comprising statistics of 37,872 cases.
In 1860 he presented another paper on the registration of diseases, including statistics of 20,056 cases treated between 1858 and 1859.
His tenure was short-lived, however, as he died during a meeting of the Board of Trustees on June 22, 1868, while giving a speech demanding for more funds.