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