Working Poor in America

Source: Oxfam America, 2014

From the summary:
Low-wage workers are everywhere in the US. It’s time for Congress to come together and ensure people earn a decent wage.

Millions of Americans do arduous work in jobs that pay too little and offer too few benefits. They serve food, clean offices, care for the young and elderly, stock shelves, and deliver pizza. They work these jobs year after year, while caring for their children and parents, trying to save for college, and paying their bills. And yet despite their best efforts, these low-wage workers fall further and further behind….
Related:
Download Working Poor in America Rankings of State Congressional District
Download Methodology for Minimum wage worker map