Originally Posted by ebus_dk

Washinton DC (district of Columbia) isn't in a state. it is it's own district. a long time ago when the states were fighting over who would have the capitol they decided to make a seperate place for Washington so that no state could claim it. It is boardered by Maryland and Virginia.

It's a federal district, and therefor have its own POSTAL code.

I would add it to Statelist if I was you, Just to make it easier for the customers