Władysław Raginis (June 27, 1908 – September 10, 1939) was a Polish military commander during the Polish Defensive War of 1939 of a small force holding the Polish fortified defense positions against a vastly larger invasion during the Battle of Wizna. Because the positions were held at great cost for three days before being annihilated with few survivors, Wizna is referred to as the Polish Thermopylae and Captain Raginis as a modern Leonidas.