How do I find my biological father?

go talk to the people at the place he donated it, and also, ask god to help you find him since he knows where everyone is

are you saying it was a clinic? then no chance at all those files are private.

She can tell you what agency she used, you can go there and ask if you can get information about him.

Well, the donation place probably isn't going to hook you up, but they may allow you to show that you would be interested if he also reached out to them expressing interest. It's a long shot, but you may be the market for long shots. A less appealing option would be to run your dna against the criminal database. Hopefully it's unlikely he is an offender, but it's not an impossibility.