The article analyzes how Poland’s membership in the United Nations Security Council (UNSC) in 2018–2019 contributed to the country’s foreign policy priorities. It outlines the differing approaches of the Civic Platform and Law and Justice governments toward both involvement in international affairs and efforts to obtain UNSC membership, along with Poland’s priorities in the Security Council, whether declared or implicit, as pertains to the pursuit of national interests. Poland’s successes include bringing about the establishment of the International Day to Commemorate Victims of Violence on the Grounds of Religion or Belief, the adoption of Resolution 2475 on Persons with Disabilities in Armed Conflict, and the UNSC presidential statement on the importance of the Geneva Conventions in contemporary armed conflicts. Less obvious, though no less important, was the use of Security Council membership to improve relations with Ukraine and strengthening the alliance between Warsaw and Washington.