On average, the lowest-income 20 percent of taxpayers face a state and local tax rate nearly 60 percent higher than the top 1 percent of households, according to a study by the Institue on Taxation and Economic Policy.
The nationwide average effective state and local tax rate paid by residents to their home states is 11.3 percent for the lowest-income 20 percent of individuals and families, 10.5 percent for the middle 20 percent, and 7.2 percent for the top 1 percent.
By my quick math, about 25% of the U.S. population lives in states and territories with neutral to progressive tax burdens.