| Aberrancy | Group | | Piła, Wielkopolskie , Poland | 2015 | Poland | | | |
| Aberration | Group | | Płock, Mazowieckie , Poland | | | | | |
| Abhor | Group | | Poland | 1991 | Skawina, Małopolskie , Poland | [unknown] | | |
| Abhorrent Funeral | Group | | Poznań, Wielkopolskie , Poland | 2015 | Poznań, Wielkopolskie , Poland | | | |
| Abigail Noises | Person | Male | Poland | | | | | |
| Ablaye Badji Band | Group | | Poland | | Ziguinchor , Senegal | | | |
| Aleksandra Ablewicz | Person | Female | Switzerland | | Kraków, Małopolskie , Poland | | | |
| Abominated | Group | | Poland | 2018 | Warsaw, Mazowieckie , Poland | | | |
| Above Aurora | Group | | Poznań, Wielkopolskie , Poland | 2015 | | | | |
| Jarosław Abramow-Newerly | Person | Male | Poland | 1933-05-17 | Warsaw, Mazowieckie , Poland | | | |
| Jerzy Abratowski | Person | Male | Poland | | | | | |
| Abraxas | Group | | Poland | 1987-10-29 | | | | 5 |
| Abren | | | Poland | | | | | |
| Absentia | Group | | Warsaw, Mazowieckie , Poland | 2013-10-01 | | | | |
| Absque Cor | Group | | Mielec, Podkarpackie , Poland | 2015 | Poland | | | |
| Abstrakt | Group | | Poznań, Wielkopolskie , Poland | | | | | |
| Absurd | Group | | Poland | | | | | |
| Absynth | Group | | Poland | 2007-12 | | | | |
| Absyntia | Group | | Poland | 2008 | | | | |
| Absztyfikanci Dobrej Myśli | Group | | Poland | | | | | |
| Abused Majesty | Group | | Białystok, Podlaskie , Poland | 1998 | Białystok, Podlaskie , Poland | | | |
| Abusiveness | Group | | Lublin, Lubelskie , Poland | 1991 | | | | |
| Abysal | Group | | | | Poland | | | |
| Abyss | Group | | Poland | | | | | |
| Abyss 3 | Group | | Poland | | | | | |
| Abyss Gazes | Group | | Poland | 2018 | Clonmel, County Tipperary, Munster, Ireland | | | |
| The Academic Choir of the University of Gdańsk | Choir | | Gdańsk, Pomorskie , Poland | | | | | |
| Academic Male Choir | Group | | Lublin, Lubelskie , Poland | | | | | |
| Acapulco | Group | | Poland | | Poland | | | |
| Acapulco | Group | | Jarocin, Wielkopolskie , Poland | 1986-07 | Jarocin, Wielkopolskie , Poland | | | |
| Access Denied | | | Gdynia, Pomorskie , Poland | 2003 | | | | |
| accurate disco | | | Poland | | Poland | | | |
| AceMan | Person | Male | Poland | 1987 | | | | |
| Acheront | Group | | Kraków, Małopolskie , Poland | 2003 | Kraków, Małopolskie , Poland | | | |
| Isidor Achron | Person | Male | United States | 1892-11-24 | Warsaw, Mazowieckie , Poland | 1948-05-12 | New York, New York, United States | |
| Anna Achtelik | Person | Female | Poland | | | | | |
| Josef Achtélik | Person | Male | Germany | 1881-04-07 | Baborów, Opolskie , Poland | 1965-12-30 | Leipzig, Sachsen , Germany | |
| Acid Drinkers | Group | | Poland | 1986-09-21 | Poznań, Wielkopolskie , Poland | | | 4 |
| Acid Flamenco | | | Poland | | | | | |
| Acid Phase | | | Zgorzelec, Dolnośląskie , Poland | | | | | |
| Acidsloth | Group | | Kraków, Małopolskie , Poland | | | | | |
| Acoustic Travel Band | Group | | Poland | 2002 | | | | |
| Acrid Snack | Group | | Gdańsk, Pomorskie , Poland | | | | | |
| Across The Moment | Group | | Poland | | Poland | | | |
| Across the Rubicon | Group | | Poland | | | | | |
| Across The Void PL | Group | | Poznań, Wielkopolskie , Poland | | | | | |
| Acrybia | Group | | Malbork, Pomorskie , Poland | 1999 | Malbork, Pomorskie , Poland | | | |
| Act Your Age | Group | | Przemków, Dolnośląskie , Poland | | | | | |
| Active Core | Group | | Warsaw, Mazowieckie , Poland | | | | | |
| Acute Mind | Group | | Poland | 2006-02 | | | | |
| AD ASTRA | Group | | Warsaw, Mazowieckie , Poland | 2016-08 | | | | |
| Ad Nihilium | Group | | Poland | 2005 | Warsaw, Mazowieckie , Poland | 2015 | | |
| Ad.M.a | Person | Female | Poland | | | | | |
| Adam Bartnikiewicz | Person | Male | Wrocław, Dolnośląskie , Poland | 1972 | Wrocław, Dolnośląskie , Poland | | | |
| Adam Czerwiński | Person | Male | Poland | 1965-07-02 | Dobrzyń nad Wisłą, Kujawsko-pomorskie , Poland | | | |
| Adam Czerwiński Band | Group | | Poland | | | | | |
| Adam Drąg | Person | Male | Poland | | | | | |
| Adam Faz | Person | Male | Gdynia, Pomorskie , Poland | | | | | |
| Adam Mickiewicz University Academic Choir | Choir | | Poznań, Wielkopolskie , Poland | 1996 | | | | |
| Adam Novy | Person | Male | Poland | | | | | |
| Adam Pierończyk Digivooco | Group | | Poland | | | | | |
| Adam Rå | | | Wrocław, Dolnośląskie , Poland | | | | | |
| Krystian Adam | Person | Male | Poland | | | | | |
| Agnieszka Adamczak | Person | Female | Poland | 1982-08-05 | Poznań, Wielkopolskie , Poland | | | |
| Maciej Adamczak | Person | Male | Poland | | | | | |
| Jerzy Sergiusz Adamczewski | Person | Male | Poland | 1921-10-08 | Warsaw, Mazowieckie , Poland | 2006-01-28 | Warsaw, Mazowieckie , Poland | |
| Mikołaj Adamczewski | Person | Male | Poznań, Wielkopolskie , Poland | | | | | |
| Czesław Adamczyk | Person | Male | Poland | | | | | |
| Łukasz Adamczyk | Person | Male | Poland | | | | | |
| Maciej Adamczyk | Person | Male | Poland | | | | | |
| P.T. Adamczyk | Person | Male | Poland | | Warsaw, Mazowieckie , Poland | | | |
| Piotr Adamczyk | Person | Male | Poland | 1972-03-21 | Poland | | | |
| Piotr Adamczyk | Person | Male | Poland | | | | | |
| Katarzyna Adamiak-Sroczyńska | Person | Female | Poland | 1975-09-15 | | | | |
| Elżbieta Adamiak | Person | Female | Poland | 1955-09-05 | | | | 4 |
| Mariusz Adamiak | Person | Male | Poland | 1961 | | | | |
| Agata Adamkiewicz | Person | | Poland | | | | | |
| Adamo | Person | Male | Poland | | | | | |
| Jarek Adamów and Traditional Polish Vocal Ansamble " Sami Swoi " | Group | | Poland | 1980-01-12 | | | | |
| Timothee Adamowski | Person | Male | United States | 1857-03-24 | Poland | 1943-04-18 | United States | |
| Arkadiusz Adamski | Person | Male | Poland | | | | | |
| Mariusz Adamski | Person | Male | Poland | | | | | |
| Tomasz Adamski | Person | Male | Poland | 1963 | Puławy, Lubelskie , Poland | | | |
| Bernard Adamus | Person | Male | Québec, Canada | 1977-12-16 | Gdynia, Pomorskie , Poland | | | |
| DJ Adamus | Person | Male | | 1975-12-13 | Opole, Opolskie , Poland | | | |
| Jakub Adamus | Person | Male | | 1991-06-01 | Szczecin, Zachodniopomorskie , Poland | | | |
| Jan Tomasz Adamus | Person | Male | Poland | 1968-06-16 | | | | |
| Adapters | Group | | Rzeszów, Podkarpackie , Poland | 2008 | Rzeszów, Podkarpackie , Poland | | | |
| Adash | Person | Male | Poznań, Wielkopolskie , Poland | | Poznań, Wielkopolskie , Poland | | | |
| The Adekaem | Group | | | | Poland | | | |
| Adela M. Popis, ISSM | | | Poland | | | | | |
| Adept | | | Poland | | | | | |
| ADHD Syndrom | Group | | Poland | 2005 | | | | |
| Adhuk | Group | | Nowy Targ, Małopolskie , Poland | 2012 | | | | |
| ראובן אדלר | Person | Male | Israel | 1943-04-08 | Warsaw, Mazowieckie , Poland | 2022-01-25 | | |
| Administratorr | Group | | Poland | | | | | |
| ADMINISTRATORR ELECTRO | Group | | Warsaw, Mazowieckie , Poland | | | | | |
| Adnable | Person | Female | Katowice, Śląskie , Poland | | | | | |
| Adonai | Group | | Poland | 1999 | Krotoszyn, Wielkopolskie , Poland | 2003 | | |
| Adonis | Person | | Warsaw, Mazowieckie , Poland | 2018 | Warsaw, Mazowieckie , Poland | | | |