Louis Christophe Auguste Allmer (8 July 1815 – 27 November 1899) was a 19th-century French historian and epigrapher.

He contributed with Paul Dissard to changing a fledgling science by confronting archaeological evidence and providing reference documentation.

He was particularly interested in Roman remains unearthed by the drilling of the PLM line in Lyon.

On 2 April 1875, he was made a chevalier of the Légion d'honneur as author of significant work in the field of archeology.

Two years later, the city of Lyon appointed him a curator of its museums of epigraphy, numismatics and sigillography.