The highest credit score possible is 900. It is very difficult to obtain a score that high though. Anything over a 680 is considered great. 720 should get the lowest interest rates available.
The "credit score", or FICO score, ranges from a low of 300 to a high of 850. In the US, half of all Americans have scores lower than 723, and half are higher.
Your credit rating is called your FICO score and 850 is the maximum attainable. Anything 720-730 and above puts you in a superior range and scores above 700 are very good.
