Hey there

Indian Space Research Organization has its headquarters at Bengaluru, Karnataka.

It has several establishments all over the Indian Subcontinent, namely:

1. Vikram Sarabhai Space Centre (VSSC), Thiruvananthapuram
2. Satish Dhawan Space Centre (SDSC) SHAR
3. U R Rao Satellite Centre (URSC), Bangalore
4. ISRO Propulsion Complex (IPRC), Mahendragiri
5. Liquid Propulsion Systems Centre (LPSC), Thiruvananthapuram, Bangalore
6. Space Applications Centre (SAC), Ahemadabad
7. National Remote Sensing Centre (NRSC), Hyderabad.
8. ISRO Telemetry Tracking and Command Network (ISTRAC), Bangalore
9. Master Control Facility (MCF), Hassan & Bhopal

10. ISRO Inertial Systems Unit (IISU), Thiruvananthapuram
11. Laboratory for Electro-Optics Systems (LEOS), Bangalore
12. Development and Educational Communication Unit (DECU), Ahmedabad
13. Regional Remote Sensing Centres (RRSCs)
14. Indian Institute of Space Science & Technology (IIST), Thiruvananthapuram
15. Indian Institute of Remote Sensing (IIRS), Dehradun
16. Physical Research Laboratory (PRL), Ahmedabad
17. National Atmospheric Research Laboratory (NARL), Gadanki
18. North Eastern-Space Applications Centre (NE-SAC), Shillong
19. Semi-Conductor Laboratory (SCL), Chandigarh
20. Antrix Corporation Limited, Bangalore

Hey,

The headquarter of Indian space research organisation is located at bengaluru

Hope it helped you!