British and Irish Ombudsman Association - Free service that exists to deal with complaints from ordinary citizens, about public or private sector services. Specifically for British and Irish citizens.
United States Ombudsman Association (USOA) - Working to promote fairness, accountability, and equity in government through the public sector ombudsman. Serves members across the U.S. and North and Central America.
University and College Ombuds Association - Organisation of persons who perform the ombuds function in universities and colleges and individuals affiliated with institutes of higher learning who are interested in ombuds practice.