Peter Fenelon Collier (December 12, 1849 – April 23, 1909) was the founder of the publishing company P.F. Collier & Son, and in 1888 founded Collier's Weekly. P.F. Collier & Son Company published the encyclopedias Collier's Cyclopedia of Social and Commercial Information (1883, Editor Nugent Robinson), the New American Encyclopedia of Social and Commercial Information (1908, Editor James E. Homans) and the 10 volume Collier's New Encyclopedia (1921, 1926, 1928, Editor Francis J. Reynolds, Chairman William A. Neilson).