The pan handle of the state of Idaho borders WA state to the east.
The US state of Maryland borders Washington DC on the east.
Washington borders Idaho to the east and and Oregon also borders Idaho to the east.
Idaho
The state that border Washington (not Washington, DC) and Oregon to the east is the great state of Idaho.
the Pacific ocean borders Washington State.
Washington DC is on the East Coast but not on the Atlantic Ocean, the state of Washington is on the West Coast and is on the Pacific Ocean.
Maryland. Montgomery County borders DC on the North and Northeast. PG County borders DC on the east and southeast.
Oregon and Idaho are the two states that border Washington state.
Idaho borders Oregon from the east.
Kansas borders the east of Colorado.
Idaho borders Washington and Oregon to the East.
Washington State borders two US States: to the south is Oregon, Idaho is to the east. The country of CANADA , specifically, the Provence of British Columbia is to the north and The Pacific Ocean is to the west.