Median household income in the U.S. in 2019 was $68,703 according to the U.S. Census, so Minnesota had a somewhat higher than average household income and Wisconsin a lower one.
The median household income in two-thirds of the St. Croix River Valley counties (Chisago, Washington, Pierce and St. Croix) was higher than their respective state averages.
Polk County was slightly lower and Burnett County much lower than the Wisconsin state average median income.
From the Great Recession until about 2013 median household income in Wisconsin and its St. Croix Valley counties was essentially flat, but all have shown strong increases since that time.
Median income in Pierce and St. Croix Counties consistently exceed the state average.
Median income in Polk County is consistently close to, but slightly below, the state average.
While Burnett County has consistently shown a lower median household income than the state, the difference has been narrowing in recent years; the gap from 2010 to 2016 averaged $12,309 but averaged only $9,075 for the 2017 – 2019 period.
Median household income in Minnesota and its St. Croix River Valley counties grew modestly from 2009 until 2015, but has grown more quickly over the 2015 to 2019 period.
Chisago County by a fair amount and Washington County by a great deal have consistently reported higher median household income than the Minnesota average.
The gap between median household income between both Chisago County and Washington County vis a vis the Minnesota average has grown over time.