President Rumen Radev, one of the country's most popular politicians, has said he would run for a new five-year term for the largely ceremonial office.
Radev is supported by the Socialists and the anti-establishment ITN party. Other parties are yet to name their candidates.
With a fractured parliament that has failed to produce a government since July 11 national polls, Bulgarians are almost certain to vote at a new parliamentary election in November as well.
