[2] Cumberland County is part of the Charleston–Mattoon, IL Micropolitan Statistical Area.

[5] As of the 2010 United States census, there were 11,048 people, 4,377 households, and 3,121 families living in the county.

Although predominantly Democratic in the years before World War I, in the aftermath of which Woodrow Wilson’s policies towards Germany were locally deplored, Cumberland County has since become powerfully Republican.

Even in Franklin D. Roosevelt's 1932 and 1936 landslides, he won only small victories, and since then only three Democrats have carried the county.

Bill Clinton, who won a plurality in 1992, is the last Democrat to reach forty percent of the county's vote, and in 2016, the rapid Upland South trend towards overwhelmingly Republican voting caused his wife Hillary to win less than twenty percent of the county's ballots.