Louis Florimond Joseph Blaringhem (1 February 1878 in Locon – 1 January 1958 in Paris) was a French agronomist and botanist.
From 1899 to 1903 he studied at the Ecole Normale Supérieure in Paris, where for several years he worked as an associate researcher in geology (1903–04) and botany (1904–07).
During this time period he served as an assistant in the laboratory of agriculture at the Museum d'Histoire Naturelle under Julien Noël Costantin.
During the summer months of 1905–09 he studied under Hugo de Vries at the Amsterdam Botanical Garden, where he conducted research on mutations and hybrids of Oenothera.
In 1928 he became a member of the French Academy of Sciences (botany section), and in 1928/29 served as director of the Maison Franco-Japonaise in Tokyo — in this position he met with Emperor Hirohito on several occasions.