Nizhniye Sergi is a town located in the Sverdlovsk Oblast of Russia. It serves as the administrative center of the Nizhneserginsky District and is situated on a rolling plain surrounded by the Ural Mountains.
The town is positioned along the Serga River, approximately 120 kilometers (75 mi) from Yekaterinburg, which is the administrative center of the oblast. According to census data, the population was recorded at 10,336 in 2010, following a decline from 14,938 in the 1989 Soviet census.