Lake Erie is northwest of Pennsylvania.
The answer is Gulf of Mexico :)
Lake Michigan
Illinois was a part of the Northwest Territory until 1809. It was on February 3, 1809 that it was established as the Illinois Territory by the10th United States Congress.
The North sea
Lake Michigan.
Point Barrow, Alaska is Northwest of Chicago, IL.
northwest providence channel
niggabay
Illinois is bordered by Wisconsin to the north and Iowa to the northwest. Michigan is northeast of Illinois.
the Mississippi river
That would be Lake Michigan.