Seattle is 25% more expensive than Washington.
When comparing Seattle, WA and Washington, DC, the overall cost of living indices are 196 and 171 respectively (national median = 100). Rent is $98/month cheaper in Washington, saving renters about $1,176/year.
Median household income is $15,697/year higher in Seattle. Home values also differ significantly — the median in Seattle is $912,100 compared to $724,600 in Washington.
Washington has no state income tax, giving Seattle residents a significant tax advantage over District of Columbia's 10.75% rate.
Seattle vs Washington — common questions