The Simla Convention, officially the Convention Between Great Britain, China, and Tibet, was an ambiguous unequal treaty concerning the status of Tibet negotiated by representatives of the Republic of China, Tibet and Great Britain in Simla in 1913 and 1914.

Unequal treaties refer to a series of treaties signed during the 19th and early 20th centuries, between China and various foreign powers. The agreements, often reached after a military defeat or a threat of military invasion, contained one-sided terms, requiring China to cede land, pay reparations, open treaty ports, give up tariff autonomy, legalise opium import, and grant extraterritorial privileges to foreign citizens.