The sign for "Washington" uses a "W" from the shoulder.
Washington: Hold a "W" hand near your right shoulder and bring the hand straight forward.
(Model: Byron Cantrell)
Washington "State"
If you need to specify that you are talking about "Washington state" (and not DC) you can add the "STATE" sign:
(Model: Byron Cantrell)
Washington DC:
Add a "D C" to the end of the sign "Washington."
(Model: Byron Cantrell)
Also see: BOSS
Notes: