Every state has a primary agency or office devoted to helping business owners at the state level. Check your state's web site for the details. Following are listings for some of the biggest states.
California Trade and Commerce Agency
980 9th Street, Suite 2450
Sacramento, California 95814
Phone: (916) 323-5400
Fax: (916) 323-5440
New York Department of Economic Development Business Assistance Hotline
633 3rd Street
New York, NY 10017
(800) 782-8369
Office of the Governor, Economic Development and Tourism