Professional Associations
Population Association of America: http://www.populationassociation.org
The International Union for the Scientific Study of Populations: http://www.iussp.org
Southern Demographic Association: http://sda-demography.org
Data Related Associations
Association of Public Data Users: http://apdu.org
Public Data University: http://apdu.org/events/public-data-university/
The Council of Professional Associations on Federal Statistics: http://www.copafs.org