Ewa Kopacz, Polish physician and politician, 15th Prime Minister of Poland

Ewa Bożena Kopacz is a Polish politician who has served as a Vice-President of the European Parliament since 2019. She previously was Marshal of the Sejm from 2011 to 2014, the first woman to hold the office, as well as Prime Minister of Poland from 2014 to 2015. In addition, Kopacz was Minister of Health from 2007 until 2011. Since 2001, she has been a member of Civic Platform, which she chaired from 2014 to 2016. Kopacz succeeded Donald Tusk as prime minister, becoming the second woman to hold the office after Hanna Suchocka (1992–1993). Her term as prime minister ended on 16 November 2015, when she was succeeded by Beata Szydło.

The president of the Council of Ministers, colloquially and commonly referred to as the prime minister, is the head of the cabinet and the head of government of Poland. The responsibilities and traditions of the office stem from the creation of the contemporary Polish state, and the office is defined in the Constitution of Poland. According to the Constitution, the president nominates and appoints the prime minister, who will then propose the composition of the Cabinet. Fourteen days following their appointment, the prime minister must submit a programme outlining the government's agenda to the Sejm, requiring a vote of confidence. Conflicts stemming from both interest and powers have arisen between the offices of President and Prime Minister in the past.