American Anthropological Association (AAA): This is the premier professional organization for anthropologists in the United States. The AAA has a number of sections representing different disciplines and interests in the field. You can learn more about the field and have access to publications that might be useful to your research. The AAA publishes the journal American Anthropologist.
Society for Applied Anthropology (SfAA): This Society is the preeminent international professional organization in the field. SfAA also has numerous sections representing various areas and interests in the field. It sponsors two important journals: Human Organization and Practicing Anthropology.