Washington is the 18th largest and the 13th most populous state. Approximately 60 percent of Washington's residents live in the Seattle metropolitan area. The state ranks 13th overall in population, and the third most populous (after California and Texas) west of the Mississippi River.
Internal migration 2000-2014: +238,546
Total population in December 2015: 7,170,351
Washington requires a Washington Transportation Commission #.
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