Washington is 148% more expensive than Columbus.
When comparing Washington, DC and Columbus, GA, the overall cost of living indices are 171 and 69 respectively (national median = 100). Rent is $828/month cheaper in Columbus, saving renters about $9,936/year.
Median household income is $49,665/year higher in Washington. Home values also differ significantly — the median in Washington is $724,600 compared to $182,300 in Columbus.
Georgia has a lower income tax rate, making Columbus slightly more tax-friendly.
Washington vs Columbus — common questions
Other cost of living comparisons for Washington and Columbus