Protectorate of missions is a term for the right of protection exercised by a Christian power in a Muslim or other non-Christian country with regard to the persons and establishments of the missionaries. The term does not apply to all protection of missions, but only to that permanently exercised in virtue of an acquired right, usually established by a treaty or convention, voluntarily consented to or accepted by the non-Christian power after more or less compulsion. The object of the protectorate may be more or less extensive, as it may embrace only the missionaries who are subjects of the protecting power or apply to the missionaries of all nations or even to the native Christians who are their recent converts.

Under the Ottoman Empire's millet system, Christians and Jews were considered dhimmi under Ottoman law in exchange for loyalty to the state and payment of the jizya tax.