| Sulejów Abbey | |
| Native Name: | Opactwo Cystersów w Sulejowie |
| Native Name Lang: | pl |
| Order: | Cistercians |
| Established: | 1176 |
| Founder: | Casimir II the Just |
| Style: | Romanesque |
| Location: | Sulejów |
| Map Type: | Poland |
| Coord: | 51.35°N 71°W |
Sulejów Abbey (Polish: Opactwo Cystersów w Sulejowie) is a former Cistercian abbey in Sulejów, Poland, founded in 1176 by Duke Casimir II the Just.
The most notable parts of the abbey are:
The monastery was dissolved in 1810. After many years of industrial and business use the surviving buildings are now used by the present parish.
The abbey is one of Poland's official national Historic Monuments (Pomnik historii), as designated October 22, 2012. Its listing is maintained by the National Heritage Board of Poland.