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.

• Atlasul localităților județului Cluj (Cluj County Localities Atlas), Suncart Publishing House, Cluj-Napoca, ISBN 973-86430-0-7