Nizhyn district is located in the central part of Chernihiv region, on the historical lands of Sivershchyna. The rivers Oster and Sejm flow within the district, the river Supiy originates, and the northern border runs through the Desna valley. Lake Trubin is a natural monument of national importance.
The administrative center of Nizhyn district is the historic city of Nizhyn, which can be considered an open-air museum due to the fact that there are many architectural monuments: St. Nicholas Cathedral in the Ukrainian Baroque style, All Saints and St. Michael's Greek Churches, Annunciation Monastery, Church of St. John the Theologian, residential buildings of the Greek quarter. The Nizhyn Post Office Museum is housed in a historic 18th-century post office building. The Memorial ...