According to the 2020 U.S. Census, populations have declined across the Upper Peninsula over the past 10 years, with the exception of Houghton County, which saw a gain of 2%.

The 2020 population totals include:

— Dickinson County, 25,947, a decline of 0.8%

— Iron County, 11,631, a decline of 1.6%

— Menominee County, 23,502, a decline of 2.2%

— Marquette County, 66,017, a decline of 1.6%

— Delta County, 36,903, a decline of 0.4%

— Houghton County, 37,361, a gain of 2%

In Wisconsin, both Florence and Marinette counties showed modest gains in population:

— Florence County, 4,558, a gain of 3.1%

— Marinette County, 41,872, a gain of 0.3%