In 2019, Clark County, ID had a population of 913 people with a median age of 33.2 and a median household income of $46,154. Between 2018 and 2019 the population of Clark County, ID declined from 1,077 to 913, a −15.2% decrease and its median household income grew from $35,341 to $46,154, a 30.6% increase.
The 5 largest ethnic groups in Clark County, ID are White (Non-Hispanic) (46.1%), White (Hispanic) (44.2%), American Indian & Alaska Native (Non-Hispanic) (4.6%), Other (Hispanic) (4.27%), and Black or African American (Non-Hispanic) (0.767%). 0% of the households in Clark County, ID speak a non-English language at home as their primary language, and 70.1% of the residents in Clark County, ID are U.S. citizens.
In 2019, the median property value in Clark County, ID was $98,100, and the homeownership rate was 62.4%. Most people in Clark County, ID drove alone to work, and the average commute time was 23.6 minutes. The average car ownership in Clark County, ID was 3 cars per household.