I found a spider in my bathroom, and traped it a small glass, is it poisonous?

I found a spider in my bathroom, it was a little over a half inch long. It was yellow in colar with no markings on it. I traped it a small glass and released it outside, but the next day my son found it again in the same bathroom were I had found it in the first place. I havn’t found any web for it at all. Is this spider poisonous or harmless? And could it be the same one or just another one? I live in Ohio, and the other guestion I have is, Is there any dangeraus posionous spider in this area? Thanks Kathy from Mansfeild.