[5] The county's highest point is in the Baraboo Range, near Durward's Glen at 1,480 feet above sea level.

46.4% were of German, 10.2% Norwegian, 7.8% Irish, 6.4% English and 5.0% United States or American ancestry.

25.50% of all households were made up of individuals, and 11.00% had someone living alone who was 65 years of age or older.

[13] For most of its history, Columbia County voters have backed the Republican Party candidate in national elections.

Prior to 1992, the only times Republicans failed to win the county in the preceding 100 years of presidential elections were in the midst of a divided party vote in 1912, in 1924 when Wisconsinite Robert La Follette was on the ballot, and in the national Democratic Party landslides of 1932, 1936, & 1964.

Republican Donald Trump won narrow pluralities in the county in 2016 and 2020, although a majority of county residents supported Democrat Tammy Baldwin's re-election to the United States Senate in 2018.