I’ll keep it short and sweet since you will want to go right to the pertinent info:
US and Canada 2013 Design Salary Guide: http://www.creativegroup.com/marketing-salary
Design Salary Guide: The real-time resource for design compensation: http://www.coroflot.com/designsalaryguide
From HOW Magazine: For an even better idea of what you should be earning, be sure to consider more than one design salary survey. You’ll find the HOW survey in the Nov 2012 issue, which looks at compensation by title and years of experience, as well as design salary trends over time. This is a download and costs $11 USD.