The Estonian Defence League is a voluntary national defence organization of the Republic of Estonia, under management of the Ministry of Defence. Its aim is to guarantee the preservation of the independence and sovereignty of the state, the integrity of its land area and its constitutional order.

The Ministry of Defence of the Republic of Estonia and its head, the Minister of Defence, are responsible for organizing national defence. It is Estonia's ministry of defence. The mission of the Ministry of Defence is to deter attacks against Estonia and ensure that the country is capable of defending itself against external threats. Estonian national defence is based on initial self-defence capability as well as membership in NATO.