Indian Space Research Organisation (ISRO) is situated in 23 different locations, spread across India. The headquarters of ISRO is in Bengaluru. You can read about the Indian Space Research Organisation [ISRO Notes for UPSC] in the given link.

Further readings:

1. GSLV Mk III – A Comprehensive Overview of Medium Lift Launch Vehicle
2. Mars Orbiter Mission (MOM) – A Complete Overview of Mangalyaan Mission