[citation needed] As of the 2010 census, there were 1,734 people, 774 households, and 514 families living in the county.

The population density was 0.7 inhabitants per square mile (0.27 inhabitants/km2), the 10th lowest in the United States.

In terms of ancestry, 44.5% were German, 23.1% were Norwegian, 12.7% were American, 12.0% were Irish, and 8.8% were English.

In the 2004 Presidential Election McCone County gave 69.6% of its votes to President George W. Bush and 28.1% to Senator John Kerry.

In the 2012 presidential election Governor Mitt Romney received 75.0% of the county's votes, while President Barack Obama only received 22.5% of the votes.