Léopold Nicolas Reichling (March 11, 1921 in Luxembourg City – May 2, 2009[1]) was a Luxembourgish biologist and naturalist.

Reichling is considered a pioneer of phytosociology in Luxembourg[6] and an eminent specialist in the flora of the Grand Duchy.

After his retirement in 1981, he intensively devoted himself to the investigation of terrestrial heteroptera in Luxembourg.

Léopold Reichling was president of the Luxembourg Naturalist Society (Société des naturalistes luxembourgeois, SNL) (1962–1968) and of the league "Natura", an overhead organization of nature conservation.

In 1997, he accepted the prize “Hëllef fir d'Natur” in recognition of his research tasks and his commitment in favor of nature conservation in Luxembourg.