Sector 21 is an neighbourhood in Ghansoli, Navi Mumbai, Thane District, Maharashtra, India. Ghansoli (0.0 Km), Kopar Khairane (3.14 Km), Rabale (3.29 Km), Airoli (5.25 Km), Vashi (6.79 Km) are the nearby areas to Sector 21. Devripada, Mumbai, Thane, Navi Mumbai are the nearby cities to Sector 21.