The NameDays in Poland for April present a diverse selection of traditional and international names celebrated throughout the month. Several names appear multiple times, with Katarzyna, Jakub, and Maria being the most frequent, each listed on three different days. Common pairs like Wacław and Wacława or Robert and Roberta frequently share celebration days, highlighting a recurring pattern. Notably, April 23rd features "Wojciech," a historically significant Polish name, alongside others like Jerzy and Helena. Each day offers a rich variety, ensuring numerous choices for NameDay honorees across the month.
| Country | Day | Month | Names |
 Poland | 1 | April | Chryzant, Grażyna, Hugo, Hugon, Katarzyna, Teodora, Tolisław, Zbigniew, Zbyszko |
| Poland | 2 | April | Franciszek, Sądomir, Urban, Władysław, Władysława |
| Poland | 3 | April | Antoni, Cieszygor, Jakub, Pankracy, Ryszard |
| Poland | 4 | April | Ambroży, Bazyli, Benedykt, Izydor, Wacław, Wacława, Zdzimir |
| Poland | 5 | April | Borzywoj, Irena, Wincenty |
| Poland | 6 | April | Ada, Adam, Adamina, Celestyn, Celestyna, Diogenes, Ireneusz, Katarzyna, Świętobor, Sykstus, Wilhelm, Zachariasz |
| Poland | 7 | April | Donat, Donata, Epifaniusz, Hegezyp, Herman, Przecław, Rufin |
| Poland | 8 | April | Apolinary, Cezary, Cezaryna, Dionizy, Gawryła, January, Radosław, Sieciesława |
| Poland | 9 | April | Dobrosława, Dymitr, Maja, Marceli, Matron |
| Poland | 10 | April | Antoni, Apoloniusz, Daniel, Ezechiel, Grodzisław, Henryk, Makary, Małgorzata, Michał, Pompejusz |
| Poland | 11 | April | Filip, Herman, Jaromir, Leon, Marek |
| Poland | 12 | April | Andrzej, Iwan, Juliusz, Siemiodrog, Wiktor, Wiktoriusz, Zenon, Zenona |
| Poland | 13 | April | Hermenegild, Hermenegilda, Ida, Jan, Justyn, Małgorzata, Przemysł, Przemysław |
| Poland | 14 | April | Berenike, Julianna, Justyn, Maria, Myślimir, Tyburcjusz, Walerian, Waleriana |
| Poland | 15 | April | Anastazja, Bazyli, Leonid, Ludwina, Modest, Olimpia, Tytus, Wacław, Wacława, Wiktoryn, Wszegniew |
| Poland | 16 | April | Benedykt, Bernadetta, Cecyl, Cecylian, Charyzjusz, Erwin, Erwina, Julia, Ksenia, Lambert, Lamberta, Nikita, Nosisław, Patrycy, Urban |
| Poland | 17 | April | Anicet, Innocenta, Innocenty, Jakub, Józef, Klara, Radociech, Robert, Roberta, Rudolf, Rudolfa, Rudolfina, Stefan |
| Poland | 18 | April | Apoloniusz, Bogusław, Bogusława, Flawiusz, Gościsław |
| Poland | 19 | April | Adolf, Adolfa, Adolfina, Alf, Cieszyrad, Czech, Czechasz, Czechoń, Czesław, Leon, Leontyna, Pafnucy, Tymon, Werner, Włodzimierz |
| Poland | 20 | April | Agnieszka, Amalia, Czech, Czechasz, Czechoń, Czesław, Florencjusz, Florenty, Nawoj, Sulpicjusz, Szymon, Teodor |
| Poland | 21 | April | Addar, Anzelm, Bartosz, Drogomił, Feliks, Irydion, Konrad, Konrada, Selma |
| Poland | 22 | April | Heliodor, Kajus, Leonia, Leonid, Łukasz, Soter, Strzeżymir, Teodor |
| Poland | 23 | April | Adalbert, Gerard, Gerarda, Gerhard, Helena, Jerzy, Wojciech |
| Poland | 24 | April | Aleksander, Aleksy, Egbert, Erwin, Erwina, Fidelis, Grzegorz, Horacjusz, Horacy |
| Poland | 25 | April | Jarosław, Marek, Wasyl |
| Poland | 26 | April | Artemon, Klaudiusz, Klet, Marcelin, Marcelina, Maria, Marzena, Spycimir |
| Poland | 27 | April | Anastazy, Andrzej, Bożebor, Kanizjusz, Martyn, Piotr, Teofil, Zyta |
| Poland | 28 | April | Arystarch, Maria, Paweł, Przybyczest, Waleria, Witalis |
| Poland | 29 | April | Angelina, Augustyn, Bogusław, Hugo, Hugon, Paulin, Piotr, Rita, Robert, Roberta, Sybilla |
| Poland | 30 | April | Bartłomiej, Chwalisława, Eutropiusz, Jakub, Katarzyna, Lilla, Marian |
