Is there any difference between a Judge and a Commissioner?

Judges belong to the Judicial Branch of Government, while Commissioners are part of the Executive Branch. Judges exercise judicial authority; Commissioners, quasi-judicial. An issue is usually passed upon by Commissioners, which, in some jurisdictions can then be appealed to a Judge. A Judge can also refer a case to Commissioners. Judges are learned men of the law; Commissioners are usually administrators of a particular agency (like the SEC) and are deemed "experts" in that field, hence, they are allowed to decide on administrative cases regading their particular fields.

I believe the Commissioner can be a couple different things. A police commissioner is in charge of city police (on the political end.)

A "Commissioners Court" is usually a county body that is overseen by a judge and several commissioners beneath him/her. They handle things like budgets and stuff.

Judges are quite different. The must have a juris doctor degree and be licensed to practice law. I don't believe that's the case for commissioners. Judges are higher ranking than commissioners.

It depends on what you mean. If you are talking in a county government then yes.

yes there is a diff.