The Monument to the Unknown Soldier (Bulgarian: Паметник на Незнайния воин, Pametnik na Neznayniya voin) is a monument in the centre of Sofia, the capital of Bulgaria, located just next to the 6th-century Church of St Sophia, on 2 Paris Street. The monument commemorates the hundreds of thousands of Bulgarian soldiers who died in wars defending their homeland. Ceremonies involving the President of Bulgaria and foreign state leaders are often performed here.

The monument was designed by architect Nikola Nikolov and opened on September 22, 1981, the 1300th anniversary of establishment of the Bulgarian state.