- 1785 - A Treaty of Amity and Commerce between His Majesty the King of Prussia, and the United States of America; September 10
- 1844 - Convention for the Mutual Abolition of the Droit d'Aubaine and Taxes on Emigration Between the United States of America and the Grand Duchy of Hesse; March 26
- 1845 - Convention for the Mutual Abolition of the Droit d'Aubaine and Taxes on Emigration Between the United States of America and his Majesty the King of Bavaria; January 21
- 1845 - Convention with Saxony for the Mutual Abolition of the Droit d'Aubaine and Taxes on Emigration; May 14
- 1846 - Convention for the Mutual Abolition of the Droit d'Aubaine and Taxes on Emigration Between the United States of America and his Royal Highness the Duke of Nassau; May 27
- 1846 - Treaty with Hanover of Commerce and Navigation; June 10
- 1847 - Declaration of Accession of His Royal Highness the Grand Duke of Oldenburg, Under the Twelfth Article of the Treaty with Hanover. March 10
- 1853 - Extradition Convention Between the United States and Bavaria; September 13
- 1857 - Extradition Convention Between the United States and Baden; January 30
- 1868 - Naturalization Treaty Between the United States and Bavaria; May 26
- 1868 - Naturalization Convention Between the United States and Baden; July 19
