| United States |
| 1847 Issue (14) |
| 1851 Issue (15) |
| 1857 Issue (31) |
| 1861-1866 Issue (15) |
| 1867 Grilled Issue (20) |
| 1869 Pictorial Issue (16) |
| 1870-1871 National Bank Note Co. Issue, H Grill (10) |
| 1870-1871 National Bank Note Co. Issue, without gr (8) |
| 1873 Continental Bank Note Co. Issue, white wove (1) |
| 1875 Re-issue of the 1861-1866 Issue (3) |
| 1875 Re-issue of the 1869 Pictorial Issue (12) |
| 1875 Reprints of the 1857 Issue (1) |
| 1875 Reproductions of the 1847 Issue (5) |
| 1879 American Bank Note Co. Issue, soft paper (3) |
| 1881-1882 American Bank Note Co. Issue, re-engrave (8) |
| 1887 American Bank Note Co. Issue (6) |
| 1890-1893 Small Bank Notes Issue (7) |
| 1893 Columbian Issue (53) |
| 1894 First Bureau Issue, Unwatermarked (7) |
| 1895 First Bureau Issue, Watermarked (14) |
| 1898 First Bureau Issue, UPU colors (4) |
| 1898 Trans-Mississippi Issue (18) |
| 1901 Pan-American Issue (13) |
| 1902-1908 Second Bureau Issue (15) |
| 1904 Louisiana Purchase Issue (11) |
| 1907 Jamestown Issue (5) |
| 1908-1909 Washington-Franklin Issue, DL wmk, imper (1) |
| 1908-1909 Washington-Franklin Issue, DL wmk, perf (9) |
| 1908-1910 Washington-Franklin Issue, DL wmk, perf (19) |
| 1909 Commemorative Issues (4) |
| 1909 Washington-Franklin Issue, Bluish Paper (3) |
| 1910-1911 Washington-Franklin Issue, SL wmk, perf (8) |
| 1910-1913 Washington-Franklin Issue, SL wmk, perf (10) |
| 1912 Washington-Franklin Issue, DL wmk, perf 12 (5) |
| 1912-1914 Washington-Franklin Issue, SL wmk, perf (13) |
| 1913-1915 Panama-Pacific Issue (24) |
| 1913-1915 Washington-Franklin Issue, SL wmk, perf (12) |
| 1914 Washington-Franklin Issue, SL wmk, imperf, ro (4) |
| 1914 Washington-Franklin Issue, SL wmk, perf 10 co (13) |
| 1914-1916 Washington-Franklin Issue, SL wmk, perf (12) |
| 1915 Washington-Franklin Issue, DL wmk, perf 10 (1) |
| 1915 Washington-Franklin Issue, SL wmk, perf 11 (4) |
| 1916-1917 Washington-Franklin Issue, flat plate, u (16) |
| 1916-1922 Washington-Franklin Issue, rotary plate, (4) |
| 1917 Washington-Franklin Issue, flat plate, DL wmk (4) |
| 1917-1919 Washington-Franklin Issue, flat plate, u (30) |
| 1918 Washington-Franklin Issue, flat plate, perf 1 (4) |
| 1918-1920 Washington-Franklin Issue, offset, imper (3) |
| 1918-1920 Washington-Franklin Issue, offset, perf (4) |
| 1919 Washington-Franklin Issue, offset, perf 12½ (2) |
| 1919-1920 Washington-Franklin Issue, rotary coil w (3) |
| 1920 Pilgrim Tercentenary Issue (1) |
| 1922 Washington-Franklin Issue, rotary sheet waste (1) |
| 1922-1929 Fourth Bureau Issue (40) |
| 1925-1929 Issues (10) |
| 1929 Kansas-Nebraska Issue (12) |
| 1929-1937 Issues (9) |
| 1938-1954 Presidential Series (3) |
| 1938-Present Issues (83) |
| Airmail (48) |
| Carrier (1) |
| Hunting Permit |
| Duck Stamps (15) |
| Local (6) |
| Newspaper (10) |
| Official (7) |
| Parcel Post (19) |
| Parcel Post Postage Due (2) |
| Postage Due (13) |
| Postal Stationery |
| Postal Cards (1) |
| Postmasters’ Provisionals (4) |
| Registration (1) |
| Revenue |
| First to Third Issues (2) |
| Private Die Medicine (3) |
| Private Die Perfumery (1) |
| Silver Tax (1) |
| Stock Transfer (1) |
| Trailer Permit Stamps (1) |
| Savings |
| War Savings (1) |
| Special Delivery (22) |
| Special Handling (1) |
| Telegraph (1) |
| U.S. Postal Agency in China (6) |
