You usually get your state refund a little bit after you have received your federal return.

You can check it though this website of the IRS

https://www.efile.com/where-is-my-state-tax-refund-check-state-income-taxes-status/

This option is if you e-filed your state,  If you did not you can always call the IRS to get faster results.  Here is some information on how to contact them:

http://www.irs.gov/uac/Contact-Your-Local-IRS-Office-1