Norwegian-Americans by state The 10 states with the most Norwegians: 1. Minnesota ­ 851,000 2. Wisconsin ­ 456,000 3. California ­ 436,000 4. Washington state ­ 368,000 5. North Dakota ­ 193,000 6. Illinois ­ 179,000 7. Iowa ­ 167,000 8. Oregon ­ 147,000 9. Texas ­ 119,000 10. South Dakota ­ 115,000 The 10 states with the top percentages of Norwegians: 1. North Dakota ­ 33% of the state's white population is of Norwegian ancestry 2. Minnesota ­ 20% 3. South Dakota ­ 17% 4. Montana ­ 12% 5. Wisconsin ­ 10% 6. Washington state ­ 8% 7. Iowa ­ 6% 8. Alaska ­ 6% 9. Oregon ­ 5% 10. Wyoming ­ 5% [edit]