 | United States of America, December 23rd, 1826 (Treaty) |
 | Great Britain, November 13th, 1836 (Lord E. Russell's Treaty) |
 | Britain and France, November 28th, 1843 (Declaration recognizing Hawaii's independence) |
| France, July 17th, 1839 (Captain LaPlace's Convention) |
| France, March 26th, 1846 (Treaty) |
| Great Britain, March 26th, 1846 (Treaty) |
 | Denmark, October 19th, 1846 (Treaty) |
 | Hamburg, January 8th, 1848 (Treaty) |
| Agreement Touching Consular Notices (Danish and Hamburg Treaties), January 25th, 1848 |
| United States of America, December 20th, 1849 (Treaty) |
  | Sweden and Norway, July 1, 1852 (Treaty) |
| Tahiti, November 24th, 1853 |
 | Bremen, March 27th, 1854 (Treaty) |
| France, September 8th, 1858 (Treaty) |
 | Belgium, October 4th, 1862 (Treaty) |
 | Netherlands, October 16th, 1862 (Treaty) |
 | Italy, July 22nd, 1863 (Treaty) |
 | Spain, October 9th, 1863 (Treaty) |
 | Swiss Confederation, July 20th, 1864 (Treaty) |
 | Russia, June 19th, 1869 (Treaty) |
 | Japan, August 17th, 1871 (Treaty) |
 | New South Wales, March 10th, 1874 (Postal Convention) |
| United States of America, January 30th, 1875 (Reciprocity Treaty) |
 | German Empire, 1879-80 (Treaty) |
 | Portugal, May 5, 1882 (Provisional Convention) |
| United States of America, September 11, 1883 (Postal Convention) |
| United States of America, December 6, 1884 (Supplementary Convention) |
 | Hong Kong, December 13th, 1884 (Money Order Regulations) |
| Universal Postal Union, March 21st, 1885 (Additional Act of Lisbon) |
| Japan, January 28th, 1886 (Convention) |
| Universal Postal Union, November 9th, 1886 (Ratification) |
 | Samoa, March 20th, 1887 (Treaty) |
