King of Poland was the title used by rulers of Poland. The first king was Bolesław I Chrobry, who was crowned in 1025, although he had been a duke since 992.
Kings of Poland=

• Piastowie
  Piast dynasty
  The Piast dynasty was the first historical ruling dynasty of Poland. It began with the semi-legendary Piast Kołodziej . The first historical ruler was Duke Mieszko I . The Piasts' royal rule in Poland ended in 1370 with the death of king Casimir the Great...
  
  
  • 1025-1025 – Bolesław I Chrobry
  • 1025-1031 – Mieszko II
    Mieszko II Lambert
    Mieszko II Lambert was King of Poland during 1025–1031, and Duke from 1032 until his death.He was the second son of Bolesław I the Brave, but the eldest born from his third wife Emmilda, daughter of Dobromir, possible ruler of Lusatia. He was probably named after his paternal grandfather, Mieszko I...
    
    
  • 1076-1079 – Bolesław II Szczodry
  • 1295-1296 – Przemysł II

• Przemyślidzi
  Premyslid dynasty
  The Přemyslids , were a Czech royal dynasty which reigned in Bohemia and Moravia , and partly also in Hungary, Silesia, Austria and Poland.-Legendary rulers:...
  
  
  • 1300-1305 – Wacław II
  • 1305-1306 – Wacław III
    Wenceslaus III of Bohemia
    Wenceslaus III Premyslid was the King of Hungary , King of Bohemia and the king of Poland ....
    
    

• Piastowie
  Piast dynasty
  The Piast dynasty was the first historical ruling dynasty of Poland. It began with the semi-legendary Piast Kołodziej . The first historical ruler was Duke Mieszko I . The Piasts' royal rule in Poland ended in 1370 with the death of king Casimir the Great...
  
  
  • 1320-1333 – Władysław I Łokietek
  • 1333-1370 – Kazimierz III Wielki

• House of Anjou (Andegawenowie)
  Capetian House of Anjou
  The Capetian House of Anjou, also known as the House of Anjou-Sicily and House of Anjou-Naples, was a royal house and cadet branch of the direct House of Capet. Founded by Charles I of Sicily, a son of Louis VIII of France, the Capetian king first ruled the Kingdom of Sicily during the 13th century...
  
  
  • 1370-1382 – Ludwik Węgierski
  • 1384-1399 – Jadwiga Andegaweńska
    Jadwiga of Poland
    Jadwiga was monarch of Poland from 1384 to her death. Her official title was 'king' rather than 'queen', reflecting that she was a sovereign in her own right and not merely a royal consort. She was a member of the Capetian House of Anjou, the daughter of King Louis I of Hungary and Elizabeth of...
    
    

• Jagiellonowie
  Jagiellon dynasty
  The Jagiellonian dynasty was a royal dynasty originating from the Lithuanian House of Gediminas dynasty that reigned in Central European countries between the 14th and 16th century...
  
  
  • 1386-1434 – Władysław II Jagiełło
  • 1434-1444 – Władysław III Warneńczyk
  • 1447-1492 – Kazimierz IV Jagiellończyk
  • 1492-1501 – Jan Olbracht
  • 1501-1506 – Aleksander Jagiellończyk
  • 1506-1548 – Zygmunt I Stary
  • 1530-1572 – Zygmunt II August

• Free election
  • 1574-1575 – Henryk Walezy
  • 1575-1596 - Anna Jagiellonka
  • 1576-1586 – Stefan Batory
    Stefan Batory
    Stephen Báthory was a Hungarian noble Prince of Transylvania , then King of Poland and Grand Duke of Lithuania . He was a member of the Somlyó branch of the noble Hungarian Báthory family...
    
    
  • 1587-1632 – Zygmunt III Waza (House of Vasa (Wazowie)
    House of Vasa
    The House of Vasa was the Royal House of Sweden 1523-1654 and of Poland 1587-1668. It originated from a noble family in Uppland of which several members had high offices during the 15th century....
    
    )
  • 1632-1648 – Władysław IV Waza (House of Vasa
    House of Vasa
    The House of Vasa was the Royal House of Sweden 1523-1654 and of Poland 1587-1668. It originated from a noble family in Uppland of which several members had high offices during the 15th century....
    
    )
  • 1648-1668 – Jan II Kazimierz Waza (House of Vasa
    House of Vasa
    The House of Vasa was the Royal House of Sweden 1523-1654 and of Poland 1587-1668. It originated from a noble family in Uppland of which several members had high offices during the 15th century....
    
    )
  • 1669-1673 – Michał Korybut Wiśniowiecki
  • 1674-1696 – Jan III Sobieski
  • 1697-1706 – August II Mocny (House of Wettin (Wettynowie))
  • 1706-1712 – Stanisław Leszczyński
  • 1709-1733 – August II Mocny (House of Wettin)
  • 1733-1736 – Stanisław Leszczyński
  • 1734-1763 – August III Sas (House of Wettin)
  • 1764-1795 – Stanisław August Poniatowski

• During 1795-1918, after the partitions of Poland
  Partitions of Poland
  The Partitions of Poland or Partitions of the Polish–Lithuanian Commonwealth took place in the second half of the 18th century and ended the existence of the Polish–Lithuanian Commonwealth, resulting in the elimination of sovereign Poland for 123 years...
  
   state doesn't exist and title haven't been used.

• 1916-1918 - Regency Council
  Regency Council
  right|thumb|Regency Council: Ostrowski, Kakowski, LubomirskiThe Regency Council of the Kingdom of Poland was a semi-independent and temporary highest authority during World War I, formed by Germany and Austria-Hungary in the occupied Polish territories in September 1917. It was supposed to stay...
  
  

In 1918 Regency Council gave control on the Poland to Józef Piłsudski. Since this moment Poland is a republic.