That will depend upon the crime you were convicted of...
Locate the state, then the city or county where you think they are being held.
If you have a criminal record, specifically if you have been convicted of a felony in the previous three years, you will most likely be prohibited from visiting an inmate.
If you are on probation or parole it is unlikely your visits will be approved, however check with your jail or prison for guidelines on this issue.
To find out how to visit someone you know, begin your search for an inmate or arrestee here:
To find your jail or prison visitation policies, begin by finding the facility or prison system here: