American Philatelic Society - The largest public philatelic library in the United States, Its holdings include catalogues, government documents, auction catalogues, and a variety of other materials. Located in State College, Pennsylvania.
The Canadian Postal Archives - Provides an overview of the philatelic collections preserved by the National Archives of Canada. Includes information about every postage stamp issued by Canada and British North America since 1851.
National Philatelic Society Library (NPSL) - A library with 1750 linear feet of shelving covering all aspects of stamp collecting from 1865 to date. It is very strong on periodicals of the world.
Rocky Mountain Philatelic Library - Houses over 5000 books on philately, issues of periodicals, auction catalogs for research purposes, a western history (postal history) and railroad collection, post office publications dating back to 1876, a collection of maps dating back to the 1870's, and an education program for children and beginning adult collectors. Denver, Colorado.
Western Philatelic Library - Located in Sunnyvale, California, the library has over 8,000 philatelic books and monographs available for public examination.
