Zrnovci is situated in the east part of North Macedonia, 8 km south of Kočani, placed in the Kočani valley, more precisely in the foot of the mountain Plačkovica, with an area of 2848 ha.

The height of Zrnovci above sea level is 345 m and as a part of the valley of Kocani it is shielded against strong north winds coming from the mountain Osogovo, and against air breakthrough from the south, it is protected by the mountain Plačkovica.

The parameters that illustrate the climate in this region are the following: According to the 2002 census, the village had a total of 2,221 inhabitants.

The profile of the education level is the following: The inhabitants are mainly agricultural producers who cultivate their fields; part of them keep domestic animals or have trade store or restaurants.

The craft and the few small industrial objects give out an impression of town activities.