The median income of Fond du Lac County residents was $30,758 per year, adjusted for inflation. It had 41,346 households with a population of 102,315.
The county with the highest median resident income in the state was Waukesha County with $39,763 per year after adjusting for inflation – $9,005 more than Fond du Lac County. It had 157,548 households with a population of 398,879.
The county with the lowest median resident income in the state was Adams County with $22,506 per year after adjusting for inflation – $8,252 less than Fond du Lac County. It had 8,619 households with a population of 20,073.
Wisconsin counties by earnings per resident (2018)
| Rank | County | Earnings per resident |
|---|---|---|
| 1 | Waukesha County | $39,763 |
| 2 | St. Croix County | $39,534 |
| 3 | Ozaukee County | $38,738 |
| 4 | Washington County | $37,085 |
| 5 | Calumet County | $36,392 |
| 6 | Dane County | $36,194 |
| 7 | Columbia County | $34,688 |
| 8 | Iowa County | $33,484 |
| 9 | Green County | $32,487 |
| 10 | Outagamie County | $32,148 |
| 11 | Kewaunee County | $31,633 |
| 12 | Sheboygan County | $31,470 |
| 13 | Brown County | $31,468 |
| 14 | Door County | $31,209 |
| 15 | Monroe County | $31,089 |
| 16 | Marathon County | $30,939 |
| 17 | Jefferson County | $30,923 |
| 18 | Lafayette County | $30,911 |
| 19 | Dodge County | $30,771 |
| 20 | Fond du Lac County | $30,758 |
| 21 | Pierce County | $30,685 |
| 22 | Trempealeau County | $30,655 |
| 23 | Racine County | $30,607 |
| 24 | Buffalo County | $30,517 |
| 25 | Wood County | $30,448 |
| 26 | Sauk County | $30,409 |
| 27 | Polk County | $30,372 |
| 28 | Kenosha County | $30,335 |
| 29 | Oconto County | $30,307 |
| 30 | Waupaca County | $30,241 |
| 31 | Manitowoc County | $30,179 |
| 32 | Winnebago County | $30,037 |
| 33 | Lincoln County | $29,830 |
| 34 | Taylor County | $29,731 |
| 35 | Chippewa County | $29,517 |
| 36 | Rock County | $29,273 |
| 37 | Pepin County | $29,199 |
| 38 | Richland County | $28,903 |
| 39 | Green Lake County | $28,755 |
| 40 | Douglas County | $28,517 |
| 41 | Milwaukee County | $28,338 |
| 42 | La Crosse County | $28,167 |
| 43 | Walworth County | $28,149 |
| 44 | Shawano County | $27,774 |
| 45 | Portage County | $27,773 |
| 46 | Bayfield County | $27,770 |
| 47 | Oneida County | $27,465 |
| 48 | Clark County | $27,443 |
| 49 | Vernon County | $27,286 |
| 50 | Washburn County | $27,103 |
| 51 | Barron County | $27,046 |
| 52 | Eau Claire County | $26,980 |
| 53 | Jackson County | $26,907 |
| 54 | Marquette County | $26,871 |
| 55 | Crawford County | $26,419 |
| 56 | Langlade County | $26,310 |
| 57 | Burnett County | $26,256 |
| 58 | Price County | $26,205 |
| 59 | Florence County | $26,087 |
| 60 | Marinette County | $26,069 |
| 61 | Waushara County | $25,962 |
| 62 | Juneau County | $25,599 |
| 63 | Rusk County | $25,517 |
| 64 | Vilas County | $25,324 |
| 65 | Grant County | $25,302 |
| 66 | Forest County | $25,252 |
| 67 | Dunn County | $25,158 |
| 68 | Sawyer County | $25,118 |
| 69 | Iron County | $24,497 |
| 70 | Menominee County | $23,722 |
| 71 | Ashland County | $23,144 |
| 72 | Adams County | $22,506 |
* All values are inflation-adjusted
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