Loder is a surname. Notable people with the surname include:
Anne Marie Loder (born 1969), Canadian actress
David Loder (born 1964), English racehorse trainer
Edward Loder (1809–1865), English composer and conductor
George Loder (1816–1868), English composer and conductor, cousin of Edward Loder
Gerald Loder, 1st Baron Wakehurst (1861–1936), British barrister, businessman, and politician
John Loder (disambiguation), multiple people
Justus Christian Loder (1753–1832), German anatomist
Kate Loder (1825–1904), English composer and pianist
Kellie Loder (born 1988), Canadian musician
Kevin Loder (born 1959), American professional basketball player
Kurt Loder (born 1945), American television personality
Loder Baronets, barons of Whittlebury and High Beeches in the United Kingdom
Sir Robert Loder, 1st Baronet (1823–1888), English politician
Terry Loder (born 1953), Canadian politician
