There are a couple of certifications out there for Comp Analysts. The most widely known is the Certified Compensation Professional (CCP) offered by WorldatWork. It is an expensive program (about $1,300 a course and a total of 9 courses). You may take as long as you need to complete the CCP. If you want to move up in the profession, the CCP is a MUST HAVE.
ERI offers two certifications: Compensation Analyst Credential (CAC) and Job & Compensation Analyst (JCA) credentials. Both are very basic and a great learning tool for people just starting out in compensation. The courses are $24.95 each and the CAC is 12 courses and the JCA is 50 courses. You have one year to complete all of the courses in order for it to count for that certification.
In addition to certifications, I have found a few certificates out there that may be of interest to some. I haven't ever taken any of these and do not know anything about them other than what their respective websites claim so I will just list them below:
(1) NC State's Compensation Training and Certification Program (Cost=$399)
(2) Cornell University's HR: Benefits and Compensation Certificate (Cost=$2,640)
Again, it is important to remember that CCP's are regarded as the experts in their field. CAC, JCA, certificates and etc are all great learning tools but the CCP is top dog.