Lionel Arthur Gilbert OAM (8 December 1924 – 28 January 2015) was an Australian historian, author, curator, lecturer, and biographer, specializing in applied, natural, and local history. Born in Burwood, New South Wales, he studied at Sydney Teachers College and, beginning in 1946, worked as a teacher and later a headmaster in state schools in various locations around New South Wales until 1961. In 1963 Gilbert graduated from the University of New England with a Bachelor of Arts in History. That same year, he was appointed a lecturer and curator at the Armidale Teachers' College Museum of Education, in which capacity he served until his retirement in 1984, overseeing several expansions of the museum and establishment of a historical research centre.