Objectives:
The objective of this paper is to analyse the evolution of Poland’s energy security strategy within the European Union before and after 24 February 2022 and to identify key challenges and policy responses. The research hypothesis assumes that the Russian invasion of Ukraine has accelerated the transition of Poland and the EU towards greater energy independence and diversification.

Methods:
The study adopts a qualitative research design based on a meta-analytical approach. A systematic review of academic literature and policy documents was conducted. The source base comprises three groups of materials: peer-reviewed academic publications indexed in Scopus, European Union policy and legal documents, including REPowerEU and Fit for 55, and Polish strategic documents, in particular the Energy Policy of Poland until 2040 (PEP2040) and the National Energy and Climate Plan to 2030. The empirical background relies on official statistical data. Eurostat data for 2018–2024 were used to analyse energy balances, import dependency and the structure of energy consumption.

Results:
The findings indicate that Poland has achieved substantial progress in energy supply diversification, primarily through infrastructure investments such as the Baltic Pipe and the expansion of LNG terminals. The effectiveness of diversification measures remains dependent on the consistent implementation of PEP2040 and on institutional integration with EU energy policy frameworks.

Conclusions:
The analysis confirms that the war in Ukraine has accelerated structural changes in Poland’s energy security policy, including supply diversification, infrastructure expansion and a marked reduction of dependence on Russian energy resources. Long-term energy security remains conditional.