Louis Hillier may refer to:
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Louis Hillier (botanist)
Louis Édouard Joseph Hillier (9 February 1871, Besançon, France – 14 March 1962, ') was a French bryologist and botanist
Botany, also called , plant biology or phytology, is the science of plant life and a branch of biology. A bo ...
(1871–1962), a French bryologist and botanist
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Louis Hillier (musician) (1868–1960), a Belgian musician and composer of Wallonia
{{hndis , Hillier, Louis