Where do I file suit on a former employer for discrimination?

I am a 49 year old female that was employed by a small county in Ohio. I worked as a fiduciary employee for the Shelby County Sheriffs office in Sidney, Ohio for 11 years and 3 mos. I was terminated on Jan 2 2009 when a Republican Sheriff took over the office, . Along with me being terminated was a 45 year old man that held also a fiduciary position as Jail Lt. He was dismissed 15 minutes after I was, we filed unemployment claims around the same time. We were discharged for the same reason (being replaced) My question is when I filed my unemployment the county denied my benefits not only once but twice, but did not deny the male Lt. that was discharged with me for the same reason do I have a discrimination case, I most certainly felt discriminated against.