600, sometimes even 500
As far as I know the minimum credit score for a personal loan is 600, but don’t expect good terms.
You can try PersonalLoans.com or lendingclub.com. PersonalLoans state that they don’t actually have a minimum credit score, and people with 500 FICO or even lower can get approved for a personal loan, depending on their income, type of loan and the state the live in.