| Type: | commune |
| County: | Cluj |
| Population Total: | auto |
| Subdivisions: | Crăești, Deleni, Livada, Petreștii de Jos, Petreștii de Mijloc, Petreștii de Sus, Plaiuri |
| Petreștii de Jos | |
| Coordinates: | 46.5808°N 23.6553°W |
Petreștii de Jos (Hungarian: Magyarpeterd; German: Ungarisch-Petersdorf) is a commune in Cluj County, Transylvania, Romania. It is composed of seven villages: Crăești (Pusztaszentkirály), Deleni (Indal), Livada (Tordaegres), Petreștii de Jos, Petreștii de Mijloc (Középpeterd), Petreștii de Sus (Felsőpeterd) and Plaiuri (Tordahagymás).
According to the census from 2011 there was a total population of 1,512 people living in this commune. Of this population, 93.25% were ethnic Romanians and 2.58% ethnic Romani.[1]