US Classic stamps are generally considered by philatelists to be the definitive and commemorative postage stamps authorized by the US Post Office Department and issued between 1847 and 1901.

With the beautifully engraved US classic stamps of the 19th Century,  there are many opportunities for the collector and the philatelist.  One can try and collect one example of each major issue, collect postmarks of a particular state or territory, collect fancy-cancel types, collect territorial postal history, etc.  The options are endless.