Tsar of the Bulgarians
цар на българите
Coat of arms of Bulgaria (1927-1946)
Royal Coat of arms
Prince Boris.png
Boris IV

since 7 April 2015
Style His Majesty
Heir presumptive Prince Beltrán of Bulgaria
First monarch Asparukh
(as Khan)
Formation 681
Residence Royal palace, Sofia

The Tsar of Bulgaria is the head of state and of Bulgaria. The Tsar is the commander-in-chief of the Military of Bulgaria. The official residence of the Tsar is at Royal palace, Sofia. The Bulgarian monarchy had two periods of foreign domination: one century and a half of Byzantine rule and almost five centuries of Ottoman rule. Early Bulgarian rulers possibly used the title khan, later knyaz for a brief period, and subsequently tsar.

The title tsar, the Slavic form of the Latin caesar, was first adopted and used in Bulgaria by Simeon I, following a decisive victory over the Byzantine Empire in 913. It was also used by all of Simeon I's successors until the fall of Bulgaria under Ottoman rule in 1396. After Bulgaria's liberation from the Ottomans in 1878, its first monarch Alexander I adopted the title knyaz. However, when de jure independence was proclaimed under his successor Ferdinand in 1908, the title was elevated to the customary tsar once more. The use of tsar continues to this day.

While the title tsar was translated as "emperor" in the First and Second Bulgarian Empires, it is translated as "king" in modern Bulgaria.

In the few surviving medieval Bulgarian royal charters, the monarchs of Bulgaria styled themselves as "In Christ the Lord Faithful Emperor and Autocrat of all Bulgarians" or similar variations, sometimes including “... and Romans, Greeks, or Vlachs".

This list does not include the mythical Bulgar rulers and the rulers of Old Great Bulgaria listed in the Nominalia of the Bulgarian khans as well as unsuccessful claimants to the throne who are not generally listed among the Bulgarian monarchs.