Q. What's the difference between jail and prison? If you are not released on bond, you will sit in jail during the pendency of your case. If you are to serve less than one year, then you go to a county jail, which is located within the particular county (i.e. Oakland County, Washtenaw County). If you are sentenced to more than a year, you go to prison, which is run by the Michigan Department of Corrections. You could serve time in a prison, which is outside the county which you committed the offense. In sum, it is far better to go to jail than to go to prison.