Timeline of stamp issuing entities of United States of America and connected areas

Postmaster Provisional stamps (*) 1846
USA 1847–today
Carrier Stamps (*) 1850–1857
Confederate States 1861–1863
Confederate States Postmaster Provisional stamps (*) 1861
Guam (*) 1899
Panama Canal Zone (US Territory) 1904–1978
Foreign Post Offices in China (*) 1919–1922
Guam guard mail (*) 1930
1850
1860
1870
1880
1890
1900
1910
1920
1930
1940
1950
1960
1970
1980
1990
2000
2010
2020

Stamp issuing entities of United States of America and connected areas

Name Issued
stamps
Bird
stamps
1846 Postmaster Provisional stamps (*)
1847–today USA ≈ 5 Thousand ≈ 336
1850–1857 Carrier Stamps (*)
1861–1863 Confederate States ≈ 10
1861 Confederate States Postmaster Provisional stamps (*)
1899 Guam (*)
1904–1978 Panama Canal Zone (US Territory) ≈ 200
1919–1922 Foreign Post Offices in China (*)
1930 Guam guard mail (*)