Pío's name day is April 30 in Spain.
Pío is a name primarily found within Hispanic communities in the USA and is more prevalent in Spanish-speaking countries, particularly those with strong Catholic traditions. Originating from the Latin 'pius,' meaning pious, it historically gained popularity through the veneration of Saint Pius. The name is overwhelmingly masculine, reflecting its religious roots and association with virtue. It evokes a mood of reverence, dignity, and unwavering faith, suggesting a personality grounded in principle. While not currently a widespread choice, it maintains a presence as a traditional and religiously significant name.
| Country | Day | Month | Names |
 Poland | 3 | January | Arletta, Dan, Danisz, Danuta, Enoch, Genowefa, Piotr, Włościsława |
| Poland | 18 | January | Bogumił, Jaropełk, Krystyna, Liberata, Małgorzata, Piotr, Pryska |
| Poland | 28 | January | Agnieszka, Augustyn, Flawian, Ildefons, Julian, Karol, Leonidas, Piotr, Radomir, Roger, Waleriusz |
| Poland | 31 | January | Cyrus, Euzebiusz, Jan, Ksawery, Ludwik, Marceli, Marcelin, Marcelina, Piotr, Spycigniew, Wirgiliusz |
| Poland | 5 | February | Adelajda, Aga, Agata, Albin, Izydor, Jakub, Jan, Justynian, Paweł, Piotr, Strzeżysława |
 Croatia | 7 | February | Pio, Rikard, Držislav |
| Poland | 8 | February | Gniewomir, Gniewosz, Honorat, Jan, Ksenofont, Lucjusz, Paweł, Piotr, Salomon, Sebastian, Żaklina |
| Poland | 22 | February | Małgorzata, Nikifor, Piotr, Wiktor, Wiktoriusz, Wrócisław |
| Poland | 23 | February | Bądzimir, Damian, Florentyn, Łazarz, Piotr, Roma, Romana, Seweryn |
| Poland | 24 | February | Bogurad, Bogusz, Boguta, Bohusz, Lucjusz, Maciej, Piotr |
| Poland | 1 | March | Albin, Antoni, Antonina, Budzisław, Budzisz, Eudokia, Eudoksja, Ewdokia, Feliks, Herakles, Herkules, Jewdocha, Joanna, Józef, Nikifor, Piotr |
| Poland | 2 | March | Absalon, Franciszek, Halszka, Helena, Henryk, Januaria, Krzysztof, Lew, Michał, Paweł, Piotr, Radosław, Symplicjusz |
 Greece | 15 | March | Agapios |
| Poland | 23 | March | Eberhard, Feliks, Katarzyna, Kondrat, Oktawian, Pelagia, Pelagiusz, Piotr, Zbysław |
| Poland | 27 | April | Anastazy, Andrzej, Bożebor, Kanizjusz, Martyn, Piotr, Teofil, Zyta |
| Poland | 29 | April | Angelina, Augustyn, Bogusław, Hugo, Hugon, Paulin, Piotr, Rita, Robert, Roberta, Sybilla |
| Croatia | 30 | April | Pio V. papa, Josip Cottolengo |
 Italy | 30 | April | Pio V |
| Poland | 8 | May | Dezyderia, Ilza, Marek, Michał, Piotr, Stanisław |
| Poland | 13 | May | Andrzej, Aron, Ciechosław, Gloria, Magdalena, Piotr, Robert, Roberta, Serwacy |
| Poland | 19 | May | Augustyn, Celestyn, Iwo, Mikołaj, Pękosław, Piotr, Potencjana |
| Croatia | 21 | May | Eugen, Serapion |
| Poland | 2 | June | Efrem, Erazm, Eugeniusz, Marcelin, Maria, Marianna, Mikołaj, Nicefor, Piotr, Racisław |
 Finland | 18 | June | Tapio |
| Poland | 23 | June | Agrypina, Albin, Bazyli, Józef, Piotr, Prosper, Wanda, Zenon, Zenona |
| Poland | 29 | June | Benedykta, Benita, Dalebor, Paweł, Piotr |
| Poland | 2 | July | Juda, Maria, Martynian, Otto, Piotr, Urban |
| Poland | 7 | July | Antoni, Benedykt, Cyryl, Estera, Kira, Metody, Piotr, Pompejusz, Sędzisława, Wilibald |
| Greece | 8 | July | Theofilos, Prokopios |
| Poland | 12 | July | Andrzej, Euzebiusz, Feliks, Henryk, Jan Gwalbert, Paweł, Piotr, Tolimir, Weronika |
| Poland | 1 | August | Brodzisław, Justyn, Konrad, Konrada, Nadia, Piotr |
| Poland | 12 | August | Bądzisław, Hilaria, Klara, Lech, Leonida, Piotr |
| Poland | 19 | August | Bolesław, Emilia, Jan, Julian, Juliusz, Ludwik, Piotr, Sebald |
| Croatia | 21 | August | Pio X. p., Hermogen, Anastazij |
| Italy | 21 | August | Pio X |
| Greece | 22 | August | Theoprepios |
| Poland | 9 | September | Augustyna, Aureliusz, Dionizy, Gorgoncjusz, Pimen, Piotr, Ścibor, Ścibora, Sergiusz, Sobiesąd |
| Poland | 12 | September | Amadeusz, Amedeusz, Cyrus, Gwidon, Maria, Piotr, Radzimir, Sylwin |
| Croatia | 23 | September | Padre Pio, Lino p., Tekla |
| Italy | 23 | September | Lino, Pio da Pietralcina |
| Poland | 25 | September | Aureli, Aurelia, Aurelian, Franciszek, Gaspar, Herkulan, Kamil, Kleofas, Kleopatra, Ładysław, Piotr, Rufus, Świętopełk, Wincenty, Władysław, Władysława, Włodzisław |
| Greece | 10 | October | Evlampios |
| Poland | 19 | October | Ferdynand, Fryda, Pelagia, Pelagiusz, Piotr, Siemowit, Skarbimir, Toma, Ziemowit |
| Poland | 16 | November | Aureliusz, Dionizy, Edmund, Gertruda, Leon, Marek, Maria, Niedamir, Otomar, Paweł, Piotr |
| Poland | 21 | November | Albert, Alberta, Albertyna, Janusz, Konrad, Konrada, Maria, Piotr, Regina, Rena, Rufus, Twardosław, Wiesław |
| Poland | 4 | December | Barbara, Berno, Biernat, Chrystian, Hieronim, Krystian, Piotr |
| Greece | 8 | December | Patapios |
| Poland | 25 | December | Anastazja, Eugenia, Piotr, Spirydion |
Spain