Hi

Before I moved to the US, I owned property in india. I have now been a resident of US for last 9 years. I am now selling the property. Question is:

Where do I pay Capital Gains tax?
If I had to pay that in India, can I claim credit in the US against the tax paid?

You will pay the capital gains tax in India if required.
Yes you can claim a credit against that tax paid on Form 1116.

You will report the sale on schedule D (Form 1040). You will have long term capital gain. Also complete Form 1116.
Another filing requirement may be Form TD F 90-22.1. Your U.S. Tax Return: U.S. Citizen or Resident with Foreign Income