In Mumbai, there are a few well-known Jain derasars where Bhagwan Rushabhdev (Adinath) is the moolnayak.

The one specifically documented as “Shri Rushabhdev Bhagwan Jain Derasar” in Mumbai is:

• Shri Rushabhdev Bhagwan Jain Derasar, Malad (West)

- Located in Aakash Apartment, Mamlatdar Wadi Road No. 4, Malad West, Mumbai – 400064 - Moolnayak: Bhagwan Rushabhdev (Adinath)

You can read a short description of this derasar here

Another very famous Rushabhdev/Adishwar temple in Mumbai (though usually known by the locality name) is:

• Babu Amichand Panalal Adishwar Jain Temple, Malabar Hill

- Moolnayak: Bhagwan Adishwar (Rushabhdev)

If you tell me your area in Mumbai (e.g., Malad, Chembur, Borivali), I can help narrow down the nearest Rushabhdev moolnayak derasar for you.