The 57% opposition figure is from December 2025, just weeks before Bulgaria joined the euro on January 1, 2026
Polling data showed that support for the euro increased over time, reaching 54% by February 2026 according to ECB surveys
The MEP did not cite a source for the 80% figure
Sources
SecondarySofia Globe43% of Bulgarians are for the euro zone and the euro, a decrease of four percentage points (implying approximately 57% opposition when accounting for undecideds)
SecondaryBrussels Signal57% of Bulgarians oppose adopting the euro in principle, while only 39% support it