BC Stats: Regional District Socio-Economic Profiles

Includes maps, population, land area, and detailed demographics for British Columbia's regional districts.
http://www.bcstats.gov.bc.ca/data/sep/rd/rd_main.htm

Regional District Maps

Includes maps for regional districts showing primary communities and census divisions.
http://www.bcstats.gov.bc.ca/data/pop/maps/RDMap.htm

Primer on Regional Districts in British Columbia

Government site explaining the history and motivation behind the creation of regional districts, and the administrative scope of their powers.
http://www.mcaws.gov.bc.ca/lgd/pol_research/rdprimer.html

British Columbia Regional District Statistics

Area, population, and budgetary statistics for all twenty-eight regional districts.
http://www.bcstats.gov.bc.ca/Regions/regDist.htm