[4] The terrain of Aurora County consists of low rolling hills, partially devoted to agriculture.

[5] The highest point is the upper west boundary line, and the terrain slopes east-northeastward; the lowest point is the county's northeast corner at 1,325 ft (404 m) ASL.

[7] As of the 2020 census, there were 2,747 people, 1,096 households, and 746 families residing in the county.

In terms of ancestry, 54.3% were German, 13.7% were Dutch, 11.8% were Norwegian, 8.7% were Irish, 7.2% were English, and 4.9% were American.

However, with the “Reagan Revolution” of the 1980s it has gradually turned into a strongly Republican county.

The last Democrat to win a majority in Aurora County was Michael Dukakis in the 1988 election.