Mecidiye is a neighborhood in İznik District, in Bursa Province, Türkiye. Mecidiye lies at 600 m above sea level, in the Samanli mountains. It has 80 inhabitants. The nearest city is Karamürsel, 14.5 km to the northwest. Beaches nearby: Kumyalı (14 km), Altınkemer (14 km). Among the landmarks around are Nicaea (16.5 km), Nicomedia (28 km) and Helenopolis (23 km).