Atlas of Minnesota: Norwegian Ancestry Maps
Color-coded map of the state of Minnesota, by county, showing percent of residents with Norwegian ancestors. Also maps of some cities.
Norwegian-American Genealogical Association
Affiliated with the Minnesota Genealogical Society.
Sons of Norway
Fraternal benefit society, largest Norwegian organization outside Norway. Based in Minneapolis. Promoting Norwegian heritage, engaging in humanitarian outreach. Nowadays you don't even have to be Norwegian or a "son" to join.