The Treaty of Badajoz (also known as the Peace of Badajoz) is signed in Badajoz on June 6, 1801, between the representatives of Prince Regent John of Portugal and representatives from the Kingdom of Spain.

Based on the terms of the accord, the Kingdom of Portugal agrees to cede Olivença (along with paying an indemnity to Spain).

Moreover, Portugal is required to close all ports to the British.

On a sidenote, Prince John is forced to sign the accord as a result of the Spanish army (along with a French auxiliary corps) having been dispatched across the Portuguese frontier.