Sector 21 is an sublocality in Nerul, Navi Mumbai, Thane District, Maharashtra, India. Nerul (0.0 Km), Juinagar West (2.39 Km), Juinagar (2.79 Km), Seawoods (3.21 Km), Sanpada (4.18 Km) are the nearby areas to Sector 21. Pargaon Dungi, Navi Mumbai are the nearby cities to Sector 21.