| United States |
| 1847 Issue (14) |
| 1851 Issue (27) |
| 1857 Issue (34) |
| 1861 Premiere Gravures (2) |
| 1861-1866 Issue (32) |
| 1867 Grilled Issue (29) |
| 1869 Pictorial Issue (23) |
| 1870-1871 National Bank Note Co. Issue, H Grill (1) |
| 1870-1871 National Bank Note Co. Issue, I Grill (9) |
| 1870-1871 National Bank Note Co. Issue, without gr (13) |
| 1873 Continental Bank Note Co. Issue, white wove (15) |
| 1875 Continental Bank Note Co. Issue, yellowish wo (1) |
| 1875 Re-issue of the 1861-1866 Issue (6) |
| 1875 Re-issue of the 1869 Pictorial Issue (11) |
| 1875 Reprints of the 1857 Issue (5) |
| 1875 Reproductions of the 1847 Issue (4) |
| 1875 Special Printing of the 1873 Continental Issu (3) |
| 1879 American Bank Note Co. Issue, soft paper (18) |
| 1880-1882 Special Printings of the 1879 & 1882 ABN (1) |
| 1881-1882 American Bank Note Co. Issue, re-engrave (11) |
| 1887 American Bank Note Co. Issue (11) |
| 1890-1893 Small Bank Notes Issue (8) |
| 1893 Columbian Issue (65) |
| 1894 First Bureau Issue, Unwatermarked (24) |
| 1895 First Bureau Issue, Watermarked (29) |
| 1898 First Bureau Issue, UPU colors (6) |
| 1898 Trans-Mississippi Issue (26) |
| 1901 Pan-American Issue (6) |
| 1902-1908 Second Bureau Issue (29) |
| 1904 Louisiana Purchase Issue (13) |
| 1907 Jamestown Issue (1) |
| 1908-1909 Washington-Franklin Issue, DL wmk, imper (1) |
| 1908-1909 Washington-Franklin Issue, DL wmk, perf (7) |
| 1908-1910 Washington-Franklin Issue, DL wmk, perf (11) |
| 1909 Commemorative Issues (6) |
| 1909 Washington-Franklin Issue, Bluish Paper (10) |
| 1910-1911 Washington-Franklin Issue, SL wmk, perf (5) |
| 1910-1913 Washington-Franklin Issue, SL wmk, perf (7) |
| 1912 Washington-Franklin Issue, DL wmk, perf 12 (4) |
| 1912 Washington-Franklin Issue, SL wmk, imperf (1) |
| 1912-1914 Washington-Franklin Issue, SL wmk, perf (2) |
| 1912-1917 Washington-Franklin Issues (6) |
| 1913-1915 Panama-Pacific Issue (15) |
| 1913-1915 Washington-Franklin Issue, SL wmk, perf (12) |
| 1914 Washington-Franklin Issue, SL wmk, imperf, ro (5) |
| 1914 Washington-Franklin Issue, SL wmk, perf 10 co (16) |
| 1914-1916 Washington-Franklin Issue, SL wmk, perf (14) |
| 1915 Washington-Franklin Issue, DL wmk, perf 10 (3) |
| 1916-1917 Washington-Franklin Issue, flat plate, u (21) |
| 1916-1922 Washington-Franklin Issue, rotary plate, (1) |
| 1917 Washington-Franklin Issue, flat plate, DL wmk (4) |
| 1917-1919 Washington-Franklin Issue, flat plate, u (15) |
| 1918 Washington-Franklin Issue, flat plate, perf 1 (6) |
| 1918-1920 Washington-Franklin Issue, offset, imper (10) |
| 1918-1920 Washington-Franklin Issue, offset, perf (4) |
| 1919 Victory Issue (2) |
| 1919 Washington-Franklin Issue, offset, perf 12½ (1) |
| 1919-1920 Washington-Franklin Issue, rotary coil w (1) |
| 1920 Pilgrim Tercentenary Issue (1) |
| 1920 Washington-Franklin Issue, flat plate, perf 1 (2) |
| 1921 Washington-Franklin Issue, rotary coil waste, (3) |
| 1922 Washington-Franklin Issue, rotary sheet waste (1) |
| 1922-1929 Fourth Bureau Issue (30) |
| 1923 Harding Memorial Issue (2) |
| 1923-2017 Issues (4) |
| 1924 Huguenot-Walloon Tercentenary Issue (3) |
| 1925 Lexington-Concord Sesquicentenary Issue (1) |
| 1925 Norse-American Issue (4) |
| 1925-1929 Issues (18) |
| 1929 Kansas-Nebraska Issue (4) |
| 1929-1937 Issues (2) |
| 1938-1954 Presidential Series (6) |
| 1938-Present Issues (2) |
| Airmail (65) |
| Complete Sheets (1) |
| General Collections (7) |
| Hunting Permit |
| Duck Stamps (9) |
| State Duck Stamps [to sort alpha by state then cat (1) |
| Local (2) |
| Newspaper (13) |
| Official (77) |
| Parcel Post (18) |
| Parcel Post Postage Due (3) |
| Postage Due (50) |
| Postal Stationery (1) |
| Postal Cards (1) |
| Postmasters’ Provisionals (7) |
| Registration (1) |
| Revenue (3) |
| Narcotic Tax (1) |
| Wines (1) |
| Savings |
| Postal Savings (1) |
| Treasury Savings (1) |
| War Savings (3) |
| Special Delivery (37) |
| Special Handling (1) |
| U.S. Postal Agency in China (16) |
