In 2019, Slope County, ND had a population of 742 people with a median age of 47.7 and a median household income of $63,611. Between 2018 and 2019 the population of Slope County, ND grew from 704 to 742, a 5.4% increase and its median household income declined from $63,942 to $63,611, a −0.518% decrease.
The 5 largest ethnic groups in Slope County, ND are White (Non-Hispanic) (96.4%), Black or African American (Non-Hispanic) (1.75%), Two+ (Non-Hispanic) (1.21%), American Indian & Alaska Native (Non-Hispanic) (0.674%), and White (Hispanic) (0%). 0% of the households in Slope County, ND speak a non-English language at home as their primary language, and 99.7% of the residents in Slope County, ND are U.S. citizens.
In 2019, the median property value in Slope County, ND was $101,800, and the homeownership rate was 82.2%. Most people in Slope County, ND drove alone to work, and the average commute time was 17.7 minutes. The average car ownership in Slope County, ND was 2 cars per household.