Pope Pius XII (1939–1958)

Pope Pius IX (1846–1878)

Pope Pius XI (1922–1939)

Pope Pius X (1903–1914)

Pope Pius II (1405–1458)

Pope Pius VI (1717–1799)

Pope Pius VII (1740–1823)

Pope Pius V (1504–1572)

Pope Pius IV (1499–1565)

Pope Pius VIII (1829–1830)

Pope Pius III (1439–1503)

Pope Pius I (c. 140–154, but Vatican lists 142/146 – 157/161)

There have been 12 Popes of the Roman Catholic Church who were named Pius:

There is also an Antipope Pius XIII who leads the tiny breakaway True Catholic Church sect. In the Babylon 5 science fiction saga, Pius XV is a fictional early 22nd Century Pope of the Roman Catholic Church. Pius XV was featured in the novel Dark Genesis.