Relationship dossier
Bulgaria
Greece
Relationship assessment
Bulgaria and Greece sustain close cooperation, including through energy connectivity and allied coordination.
Bulgaria toward Greece
+60Bulgaria developed the Greece–Bulgaria gas interconnector, which began commercial operation in 2022 and connects its gas system with Greece. This is a concrete contribution to bilateral energy connectivity.
Greece toward Bulgaria
+60Greece enabled the Greece–Bulgaria gas interconnector to connect with its gas network, providing Bulgaria access to gas supplies through Greece. The link began commercial operation in 2022.
Overall relationship
+65The relationship has a durable cooperative basis in shared EU and NATO membership and practical cross-border energy infrastructure. The operating gas interconnector is a significant bilateral project; the relationship is cooperative without evidence here of exceptional integration across all policy areas.
How to read these scores
Scores are rough judgments, not objective measurements or current verification. Directional scores describe government policy and conduct, not public opinion. The overall score is an independent estimate, never an average.
- −100
- Extreme sustained hostility
- −50
- Substantially adversarial
- 0
- Mixed or neutral, supported by knowledge
- +50
- Substantially cooperative
- +100
- Exceptionally close sustained partnership
“Not assessed” means there is no recorded score. Pair existence makes no claim about diplomatic recognition or established relations.
Relationship context
Overview
Bulgaria and Greece maintain a close cooperative relationship as EU and NATO allies, with practical collaboration on energy and regional connectivity. The Greece–Bulgaria gas interconnector began commercial operation in 2022, linking Bulgaria to gas supplies through Greece. Their cooperation is sustained, although the available examples do not by themselves indicate an exceptionally integrated partnership.
Key developments
The Greece–Bulgaria gas interconnector began commercial operation, linking the two countries' gas systems.
Major uncertainties
- The scope of ongoing bilateral coordination beyond energy and regional security is unclear.
- The long-term effects of energy and transport cooperation on bilateral policy are uncertain.