The median income of Ada County residents was $32,937 per year, adjusted for inflation. It had 173,353 households with a population of 456,849.
The county with the highest median resident income in the state was Teton County with $33,984 per year after adjusting for inflation – $1,047 more than Ada County. It had 3,707 households with a population of 11,426.
The county with the lowest median resident income in the state was Madison County with $12,911 per year after adjusting for inflation – $20,026 less than Ada County. It had 11,016 households with a population of 39,100.
Idaho counties by earnings per resident (2019)
| Rank | County | Earnings per resident |
|---|---|---|
| 1 | Teton County | $33,984 |
| 2 | Ada County | $32,937 |
| 3 | Blaine County | $31,209 |
| 4 | Nez Perce County | $29,099 |
| 5 | Kootenai County | $28,786 |
| 6 | Boise County | $27,921 |
| 7 | Jefferson County | $27,630 |
| 8 | Bonneville County | $27,063 |
| 9 | Payette County | $27,032 |
| 10 | Adams County | $26,878 |
| 11 | Elmore County | $26,809 |
| 12 | Power County | $26,383 |
| 13 | Valley County | $26,342 |
| 14 | Bear Lake County | $26,286 |
| 15 | Twin Falls County | $26,170 |
| 16 | Caribou County | $25,919 |
| 17 | Butte County | $25,764 |
| 18 | Cassia County | $25,371 |
| 19 | Bonner County | $25,310 |
| 20 | Clearwater County | $25,302 |
| 21 | Lincoln County | $25,216 |
| 22 | Canyon County | $25,210 |
| 23 | Minidoka County | $25,095 |
| 24 | Camas County | $25,087 |
| 25 | Gooding County | $25,003 |
| 26 | Boundary County | $24,746 |
| 27 | Bannock County | $24,667 |
| 28 | Jerome County | $24,582 |
| 29 | Bingham County | $24,405 |
| 30 | Fremont County | $24,360 |
| 31 | Oneida County | $24,288 |
| 32 | Lewis County | $23,597 |
| 33 | Owyhee County | $23,583 |
| 34 | Clark County | $23,424 |
| 35 | Benewah County | $23,285 |
| 36 | Gem County | $22,739 |
| 37 | Latah County | $22,682 |
| 38 | Franklin County | $22,649 |
| 39 | Lemhi County | $22,472 |
| 40 | Idaho County | $21,757 |
| 41 | Shoshone County | $21,338 |
| 42 | Washington County | $21,188 |
| 43 | Custer County | $19,388 |
| 44 | Madison County | $12,911 |
* All values are inflation-adjusted
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