This is a list of Bulgarian football clubs in European competition. Bulgarian clubs have participated since 1956, when CSKA Sofia entered the 1956–57 European Cup.
For the 2020–21 UEFA competitions, the associations will be allocated places according to their 2019 UEFA country coefficients, which will take into account their performance in European competitions from 2014–15 to 2018–19. In the 2019 rankings that will be used for the 2020–21 European competitions, Bulgaria's coefficient points total is 17.500. After earning a score of 4.000 during the 2018–19 European campaign, Bulgaria is ranked by UEFA as the 28th best association in Europe out of 55.
App. = Appearances; P = Matches played; W = Matches won; D = Matches drawn; L = Matches lost; EC = European Cup; UCL = UEFA Champions League; UC = UEFA Cup; UEL = UEFA Europa League; CWC = UEFA Cup Winners' Cup; UIC = UEFA Intertoto Cup.
Note 1: A number of Eastern European clubs withdrew from the first two rounds when UEFA paired up all of the Eastern European clubs against one another due to the Warsaw Pact invasion of Czechoslovakia.
Note 3: Bulgarian clubs did not enter the Champions League during these seasons due to the restructuring of the competition by UEFA, with entry limited to Europe's top 24 countries. The Bulgarian league champions entered the UEFA Cup instead.
Note 1: A number of Eastern European clubs withdrew following UEFA's decision to separate western and Eastern countries due to troubles in Czechoslovakia.
Note 2: CSKA Sofia were barred from entering the European competitions after the riots during the Bulgarian Cup final.