Saywell is a surname. Notable people with the surname include:
John Saywell (1929–2011), Canadian historian Michael Saywell (1942–2023), British equestrian Thomas Saywell (1837–1928), Australian tobacco manufacturer, property developer, mine owner, and business person William Saywell (1643–1701), English Anglican archdeacon and academic William G. Saywell (born 1936), Canadian historian
See also Samwell