Leonard Forrer or Leonhard Forrer (7 November 1869, Winterthur, Switzerland – 17 November 1953, Bromley, United Kingdom) was a Swiss-born numismatist and coin dealer.
[1] He came to study in England in 1887 and two years later began working for Spink and Son, an art dealer's in London.
He soon became responsible for their sales of coins and medals and developed that sector of their business to a world-class level.
As well as several other publications and numismatic catalogues, he was most notable for his eight-volume biographical dictionary of medallists and mint magistrates from classical antiquity to 1900, still an important work.
In 1944 he was awarded the medal of the Royal Numismatic Society.