Leica Society International (formerly LHSA - The International Leica Society, and formerly Leica Historical Society of America)^[1] is an independent, nonprofit membership organization dedicated to everything regarding the Leica camera. It changed its name in 2023 to Leica Society International. Before then, It changed its name in 2012 to "LHSA - The International Leica Society" so as to be international rather than American.^[2]

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The LHSA is mainly for collectors of Leica historical and rare pieces of Leica cameras and lenses. LHSA has also originated limited LHSA-editions of Leica cameras and lenses that Leica Camera AG has created, for example the Leica MP 3 0.72 LHSA Special Edition.

Viewfinder, a quarterly journal, dedicated to Leica use and history.