Source: U.S. Bureau of the Census
Release: County Poverty Status
This data comes from Table S1701 of the American Community Survey.
The date of the data is the end of the 5-year period. For example, a value dated 2015 represents data from 2010 to 2015.
U.S. Bureau of the Census, Percent of Population Below the Poverty Level in King County, WA [S1701ACS053033], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/S1701ACS053033, October 20, 2017.