By now it is well documented, here and perhaps everywhere, that North Dakota experienced a significant economic transition over the last ten years. How permanent and sustainable a change is the current question. At the risk of editorializing too much I will just point out, that is almost always the question, and we seldom have an answer until well after the fact. This issue aside, I looked at the median income data by county in North Dakota. The data are the 5-year estimates from the Census Bureau. If you want all counties in the state that is the data series you need to employ, and since I want to look at counties across the state that is what I chose. I took each county median income measure and divided it by the median income for the state as a whole to see how the individual counties changed over time. The first year was 2009.
North Dakota County Median Income
