Portal:Poland/Selected anniversaries/June
January - February - March - April - May - June - July - August - September - October - November - December
- 1434: death of King Władysław II Jagiełło of Poland
- 1915: birth of Jan Twardowski a Polish poet and priest
- 1880: death of Oskar Kolberg a Polish composer and ethnographer
- 1872: death of Stanisław Moniuszko a Polish composer
- 1951: birth of Bronisław Malinowski a Polish athlete
- 1960: death of Józef Haller de Hallenburg a Polish general and politician
- 1989: first partially free elections for the Sejm and free elections for the Senate after the Second World War in Poland
- 1818: death of Jan Henryk Dąbrowski a Polish general
- 1841: birth of Eliza Orzeszkowa a Polish singer
- 1492: death of King Casimir IV Jagiellon of Poland
- 2003: first day of the Polish Referendum on joining the European Union
- 1956: death of Jan Lechoń a Polish poet and literary critic
- 1895: birth of Felicjan Sławoj Składkowski a Polish general and politician
- 1920: Polish–Soviet War; Polish units withdraw from the city of Kiev
- 1940: Polish Navy authorities officially recognize the submarine ORP Orzeł as lost
- 1952: birth of Bronisław Wildstein a Polish journalist
- 1915: death of Józef Brandt a Polish painter
- 1930: birth of Ryszard Kukliński a Polish colonel and "Cold War" masterspy
- 1025: death of Bolesław I Chrobry first King of Poland
- 1353: King Casimir III granted Lwów city rights
- 1501: death of Jan I Olbracht King of Poland
- 1620: death of Mikołaj Zebrzydowski voivode of Kraków and Grand Crown Marshal
- 1696: death of Jan III Sobieski King of Poland
- 1793: in Grodno began the last Sejm of the Polish–Lithuanian Commonwealth
- 1915: birth of Mirosław Ferić a Polish flying ace
- 1939: birth of Krzysztof Zanussi a Polish producer and film director
- 1972: birth of Michał Żebrowski a Polish actor
- 1983: death of Miron Białoszewski a Polish poet
- 2003: death of Jacek Kuroń a dissident and opposition leader with the Solidarity movement
- 1869: The Polish aviation pioneer Jan Wnęk flow 1300 metres in his glider called "Loty", crashed and died three weeks later
- 1942: death of Stanisław Skarżyński a Polish aviator
- 1934: The Adamowicz brothers took off from Harbour Grace, Newfoundland for their flight across the Atlantic Ocean