With a 620 score, you have several potential loan avenues to explore. Your best option will depend on your financial situation, what you need the funds for, and your comfort with risk.
This is what most people think of when they hear "personal loan." It's a loan based solely on your creditworthiness and promise to repay—no collateral required. These are available from online lenders, banks, and credit unions. For a 620 score, online lenders are often the most accessible option, as many specialize in the fair credit market. Approval is not guaranteed, and your debt-to-income ratio (DTI) will be a major factor.
Secured Personal Loans
If you're having trouble qualifying for an unsecured loan, a secured loan might be an option. This type of loan requires you to pledge an asset as collateral, such as a savings account or a vehicle. Because the lender can seize the collateral if you default, the loan is less risky for them. This often results in a higher chance of approval, a larger loan amount, and a lower APR than you'd get for an unsecured loan with the same credit score. The obvious downside is that you risk losing your asset if you can't make the payments.
Credit Union Loans
Credit unions are non-profit, member-owned financial institutions. They are often more flexible with their lending criteria than big banks. If you're a member of a credit union, it's always worth checking their personal loan options. They may look at your entire relationship with them, not just your credit score, and sometimes offer more favorable rates. Some credit unions offer "Payday Alternative Loans" (PALs), which are small-dollar loans with more consumer-friendly terms than traditional payday loans.
Co-signer Loans
Applying with a co-signer who has good or excellent credit can dramatically increase your chances of approval and help you secure a lower interest rate. A co-signer is legally responsible for the debt if you fail to pay. This is a big commitment, so you should only ask someone who trusts you completely, and you must be certain you can make the payments to protect their credit as well as your own.