Allchin is a surname which may refer to:
Basil Charles Allchin (1878–1957), British organist and teacher Bridget Allchin (1927–2017), British archaeologist Donald Allchin (1930–2010), British Anglican priest and theologian Jim Allchin (born 1951), American blues rock guitarist, computer scientist, and philanthropist Raymond Allchin (1923–2010), British archaeologist Sir William Allchin (1846–1912), English physician and lecturer William Thomas Howell Allchin (1843–1883), British organist, father of Basil
See also Alchin