Loutit is a surname. Notable people with the surname include:
Blythe Loutit (1940–2005), South African illustrator Isobel Loutit (1909–2009), Canadian statistician Jessie Loutit (born 1988), Canadian rower John Freeman Loutit (1910–1992), Australian haematologist and radiobiologist Margaret Loutit (1929–2020), New Zealand microbiologist
See also Louttit, a related surname