[3] Mineral County has voted for the Republican Party candidate in all national elections since 2000.

[citation needed] As of the 2010 census, there were 4,223 people, 1,911 households, and 1,229 families in the county.

The racial makeup of the county was 94.9% white, 1.5% American Indian, 0.7% Asian, 0.3% black or African American, 0.2% from other races, and 2.4% from two or more races.

In terms of ancestry, 30.9% were German, 16.9% were Irish, 15.4% were English, and 3.0% were American.

Males had a median income of $35,536 versus $20,370 for females.