List of assemblies called Sejm
- Confederated sejm
- Contract Sejm
- Convocation Sejm (1764)
- Convocation sejm
- Coronation sejm
- Council of Four Lands
- Diet of Galicia and Lodomeria
- Election Sejm of 1632
- Election sejm
- Great Sejm
- Grodno Sejm
- Pacification sejm
- Partition Sejm
- Repnin Sejm
- Republic of Central Lithuania
- Saeima
- Seimas
- Sejm
- Sejm of the Kingdom of Poland
- Sejm of the Polish–Lithuanian Commonwealth
- Seym River
- Silent Sejm
- Silesian Parliament