Petropavlovka () is a rural locality (a selo). It is part of the Blagoveshchensky Village Council of Kupinsky District, Novosibirsk Oblast, Russia. Population:
Petropavlovka lies in the Baraba Steppe close to lake Bolshoy Bagan to the east. The nearest towns are Blagoveshchenka, located to the WNW and Grushevka to the east beyond the lake.