Gamarnya is a village in Bykhaw Raion, in Mogilev Region, Belarus. Gamarnya lies at 148 m above sea level. The nearest city is Rahachow, 42 km to the south. Among the landmarks around are Synagogue in Bychaŭ (17.5 km), Church of the Holy Trinity in Bychaŭ (17.2 km) and Bychaŭ Castle (17.7 km).