Roswell Park (May 4, 1852 – February 15, 1914) was an American physician, best known for starting Gratwick Research Laboratory in 1898, which is now known as Roswell Park Comprehensive Cancer Center. In 1900, the Gratwick family of Buffalo helped to finance Park's laboratory with a $25,000 donation in memory of William Henry Gratwick, a patient of Park's. Park was also a professor of surgery at the University at Buffalo Medical School and a surgeon at Buffalo General Hospital.