What is the average hourly rate for a freelance marketing researcher?

This is a tough question to answer, because it varies significantly. On average, expect to pay somewhere in the range of $15 to $50 an hour. Freelancers are also known to bill on a project-basis, which is often an affordable alternative. Check out Guru at www.guru.com or iFreeLance (www.ifreelance.com). These are great sites with highly qualified freelance-members.