Michalina Mościcka (née Czyżewska; 20 December 1871 – 18 August 1932) was a Polish politician and activist who was the First Lady of Poland as the wife of Ignacy Mościcki from 1926 until her death. She advocated for women's rights and Polish independence, organised charities for destitute children and flood victims, and managed medical aid to Polish soldiers during World War I.