[3] The terrain of Sanborn County consists of rolling hills, largely devoted to agriculture.

The James River flows southward through the east-central part of the county, and the SW part of the country is drained by Dry Run Creek.

[4] The terrain slopes to the south and to the southeast; its highest point is in its SW corner, at 1,358 ft (414 m) ASL.

[6] As of the 2020 census, there were 2,330 people, 936 households, and 630 families residing in the county.

In 64% of the national elections since 1960, the county selected the Republican Party candidate (as of 2020).