Pierre Joseph Michel Lorquin (2 July 1797, Valenciennes – 8 February 1873, Paris) was a French entomologist who specialised in Coleoptera and Lepidoptera.
In 1847/48 he collected for Charles Oberthur and Jean Baptiste Boisduval in Andalusia and Algeria, between 1849 and 1858 in California and Oregon, from 1859-1860 in China and the Philippines and from 1860-1865 in Celebes, Moluccas, Aru and New Guinea. Finally from 1866-1869 he collected in Colombia and again in California.
He is honoured in the butterfly names Lorquin's admiral and Papilio lorquinianus