The median income of Latah County residents was an inflation-adjusted $21,420 per year. Latah County had 15,448 households in 2017, with a population of 38,697.
The county with the highest median resident income in the state was Teton County. Teton County's median income was $32,088 per year after adjusting for inflation – $10,668 more than Latah County. It had 3,764 households in 2017 and a population of 10,776.
Madison County had the lowest annual resident income among counties in Idaho, with a median income of only $11,288 per year. That was $10,132 less than the median income in Latah County at the time. Madison County had 10,633 households in 2017 and a population of 38,241.
The table below shows the state's counties ranked by median annual resident earnings in 2017.