The area dealt with under the present wildlife management covers Sanjay Gandhi National Park (103 sq.km) and the newly constituted Tungareshwar Wildlife Sanctuary (96 sq.km).
The Sanjay Gandhi National Park division falls between longitude 720 53” E to 720 58” E and latitude 190 8.8”to 190 21” N. Sanjay Gandhi National Park division is situated partly in Thane District and (59.24 Sq.Km.) and in Mumbai Suburban District (44.44 Sq.Km.) of Maharashtra State.
There are three territorial ranges in this division - Yeur range, Tulsi range and Krishnagiri Upvan range that have been divided into 9 rounds and 25 beats. The Krishnagiri Upvan range is the smallest of all the ranges.