the northwest ordinance of 1787
northwestern territory
The Northwest Ordinance was an act that created the Northwestern territory which includes the now states of Ohio, Illinois and Wisconsin. It also covered the states of Michigan and Indiana.
Northwestern States Mission was created in 1897.
Thomas Jefferson wrote the Land Ordinance of 1785 which divided the Northwest Territories into 10 states. Ohio was the first of these states, soon followed by Indiana and Illinois.
East of Alaska or the Northwestern part of Canada
In the United States, Washington is the northwestern most state.
The northwestern us states are Alaska, washington, idaho, Oregon, Montana. These are the five and only northwestern us states this is what every American child should learn in sixth grade [or 4th or 5th grade, at least.]
delaware
The State of Alaska, which is part of the United States, has a border with the northwestern region of Canada.
Washington
There are two correct forms, neither of which is exactly given in the question: "Oregon is a [not "the"] northwestern state" or "Oregon is one of the northwestern states."