A three-question referendum was held in Bulgaria on 6 November 2016 alongside presidential elections.

[1] Voters were asked whether they supported limiting public funding of political parties to one lev per year per valid vote received at the previous elections, the introduction of compulsory voting in elections and referendums, and changing the electoral system for the National Assembly to the two-round system.

However, as over 20% of registered voters voted in favour, the proposals still had to be debated in the National Assembly.

Slavi Trifonov, the initiator of the referendum claimed that the number of people voting in the referendum was actually slightly higher than the number required to make it mandatory, that the Election Commission had closed polling stations while people were still waiting to vote and had removed video surveillance from polling stations to "sabotage the referendum".

[9][10][11][12] Trifonov claimed that more than 12,000 ballots were excluded from the count for not being in an envelope.