Sejmik

266px|thumb|right| Sejmik in a church, by [[Jean-Pierre Norblin de La Gourdaine (1745–1830)]]

A sejmik (, diminutive of sejm, occasionally translated as a dietine; An act of July 1564 established sejmiks in the Grand Duchy.

After the Union of Lublin in 1569, the Polish–Lithuanian Commonwealth had about 70 sejmiks (out of those, 24 were in the Grand Duchy of Lithuania).

thumb|Nobility fighting at a sejmik, Jean-Pierre Norblin de La Gourdaine

Historians distinguish several types of sejmiks, depending on their geographical scope:

General (Polish: generalny, Latin conventiones generales), held in western Poland (Greater Poland) at Koło, in southern Poland (Little Poland) at Nowe Miasto Korczyn, in Masovia at Warsaw, in Red Ruthenia at Sądowa Wisznia (Sudova Vyshnia), and in Lithuania at Wołkowysk (Vawkavysk).

Bełz (for Bełz Voivodeship), four envoys elected to the Sejm,
Chełm (for the Land of Chełm), two envoys elected,
Czernihów (for Czernihów Voivodeship), four envoys elected,
Halicz (for the Lands of Halicz, Kołomyja, and Trembowla), six envoys elected,
Kamieniec Podolski (for Podole Voivodeship), four envoys elected,
Łuck (for Wołyń Voivodeship), six envoys elected,
Opatów (for Sandomierz Voivodeship), six envoys elected,
Proszowice (for Kraków Voivodeship), six envoys elected,
Urzędów, also Lublin (for Lublin Voivodeship, three envoys elected,
Winnica (for Bracław Voivodeship), three envoys elected,
Sądowa Wisznia (for the Lands of Lwów, Sanok, and Przemyśl), six envoys elected,
Zator (for the Duchy of Oświęcim, and the Duchy of Zator), one envoy elected,
Żytomierz (for Kijów Voivodeship), three envoys elected.

Bielsk (for the County of Bielsk), two envoys elected,
Ciechanów (for the Land of Ciechanów), two envoys elected,
Czersk (for the Land of Czersk), two envoys elected,
Drohiczyn (for the County of Drohiczyn), two envoys elected,
Gąbin (for the Land of Gostynin), two envoys elected,
Lipno (for the Land of Dobrzyń), two envoys elected,
Liw (for the Land of Liw), two envoys elected,
Łomża (for the Land of Łomża), two envoys elected,
Mielnik (for the County of Mielnik), two envoys elected,
Nur (for the Land of Nur), two envoys elected,
Parzęczew (for Łęczyca Voivodeship), two envoys elected,
Raciąż (for Płock Voivodeship), four envoys elected,
Radziejów (for Brześć Kujawski Voivodeship and Inowrocław Voivodeship), four envoys elected,
Rawa Mazowiecka (for the Land of Rawa), two envoys elected,
Różan (for the Land of Różan), two envoys elected,
Sochaczew (for the Land of Sochaczew), two envoys elected,
Szadek (for Sieradz Voivodeship), two envoys elected,
Środa Wielkopolska (for Kalisz Voivodeship and Poznań Voivodeship), twelve envoys elected,
Warsaw (for the Land of Warsaw), two envoys elected,
Wieluń (for the Land of Wieluń and the County of Ostrzeszów), two envoys elected,
Wizna (for the Land of Wizna), two envoys elected,
Wyszogród (for the Land of Wyszogród), two envoys elected,
Zakroczym (for the Land of Zakroczym), two envoys elected.

Człuchów (for the County of Człuchów), two envoys elected,
Kowalewo Pomorskie ( for Chełmno Voivodeship), two envoys elected,
Malbork (for Malbork Voivodeship), two envoys elected,
Mirachowo (for the County of Mirachowo), two envoys elected,
Puck (for the County of Puck), two envoys elected,
Starogard Gdański (for the Counties of Gdańsk, Tczew, Nowe, and in 1642–1655 for the Lębork – Bytów Land), two envoys elected; in 1642–1655, four envoys elected,
Świecie (for the County of Świecie), two envoys elected,
Tuchola (for the County of Tuchola), two envoys elected.

According to the 1598 bill of the Sejm, regional sejmiks for Livonia took place in Kieś, in some cases also in Ryga. After Swedish conquest of most of Livonia in the 1620s, the sejmiks were moved to Dyneburg. The nobility of the County of Piltyń, formally equal to the nobility of the Commonwealth, did not elect any envoys to the Sejm.

See also