This interactive map shows the level of childhood poverty in each county in America. Childhood poverty is the percentage of children who live in households who make less then the poverty level. https://aspe.hhs.gov/poverty-guidelines
Data Source: S1701 POVERTY STATUS IN THE PAST 12 MONTHS, 2011-2015 American Community Survey 5-Year Estimates. https://factfinder.census.gov/
This map shows by census tract the percentage of K-12 students who are living in poverty.
Data Source:
POVERTY STATUS IN THE PAST 12 MONTHS BY SCHOOL ENROLLMENT BY LEVEL OF SCHOOL FOR THE POPULATION 3 YEARS AND OVER
Universe: Population 3 years and over for whom poverty status is determined more information
2011-2015 American Community Survey 5-Year Estimates
"The Valley of Poverty,” illustrated with some of the most powerful and intimate photographs of Dominis’ career, served (and still serves today) as an indictment of a wealthy nation’s indifference, and a plea — if not a demand — that the rest of the country not turn its back on the suffering of so many of its citizens."
To be fair, this map doesn't look at the number of poor but the number of Americans who live in "poverty" areas. This could suggest the north is more segregated, where poor people are kept away from wealthy folks.
McDowell County, West Virginia sure looks like some beautiful country to live in, even if it's very poor.