| County Name | State | Average Adjusted Gross Income | Rank* | |||||
| Zavala County | Texas | $18,761 | 1 | |||||
| Hayes County | Nebraska | $19,537 | 2 | |||||
| Ziebach County | South Dakota | $19,639 | 3 | |||||
| Issaquena County | Mississippi | $20,000 | 4 | |||||
| Starr County | Texas | $20,210 | 5 | |||||
| Todd County | South Dakota | $20,634 | 6 | |||||
| Corson County | South Dakota | $20,693 | 7 | |||||
| East Carroll Parish | Louisiana | $21,129 | 8 | |||||
| Shannon County | South Dakota | $21,397 | 9 | |||||
| Maverick County | Texas | $21,523 | 10 | |||||
| Loup County | Nebraska | $21,630 | 11 | |||||
| Guadalupe County | New Mexico | $21,758 | 12 | |||||
| Culberson County | Texas | $21,778 | 13 | |||||
| Buffalo County | South Dakota | $21,838 | 14 | |||||
| Keya Paha County | Nebraska | $21,852 | 15 | |||||
| Dewey County | South Dakota | $22,018 | 16 | |||||
| Holmes County | Mississippi | $22,224 | 17 | |||||
| Presidio County | Texas | $22,379 | 18 | |||||
| Wheatland County | Montana | $22,400 | 19 | |||||
| Shannon County | Missouri | $22,554 | 20 | |||||
| Searcy County | Arkansas | $22,557 | 21 | |||||
| Jefferson County | Mississippi | $22,762 | 22 | |||||
| Tallahatchie County | Mississippi | $22,820 | 23 | |||||
| Noxubee County | Mississippi | $22,876 | 24 | |||||
| Perry County | Alabama | $22,897 | 25 | |||||
| Luna County | New Mexico | $22,921 | 26 | |||||
| McIntosh County | North Dakota | $23,005 | 27 | |||||
| McCreary County | Kentucky | $23,010 | 28 | |||||
| Ozark County | Missouri | $23,073 | 29 | |||||
| Catron County | New Mexico | $23,111 | 30 | |||||
| Metcalfe County | Kentucky | $23,201 | 31 | |||||
| Sharkey County | Mississippi | $23,242 | 32 | |||||
| Quitman County | Mississippi | $23,270 | 33 | |||||
| Wade Hampton Census Area | Alaska | $23,315 | 34 | |||||
| Harding County | New Mexico | $23,383 | 35 | |||||
| Reeves County | Texas | $23,479 | 36 | |||||
| Hudspeth County | Texas | $23,498 | 37 | |||||
| Owsley County | Kentucky | $23,533 | 38 | |||||
| Meagher County | Montana | $23,602 | 39 | |||||
| Willacy County | Texas | $23,712 | 40 | |||||
| Hancock County | Tennessee | $23,802 | 41 | |||||
| Madison Parish | Louisiana | $23,863 | 42 | |||||
| Mellette County | South Dakota | $23,881 | 43 | |||||
| Blaine County | Nebraska | $23,960 | 44 | |||||
| Humphreys County | Mississippi | $24,002 | 45 | |||||
| Douglas County | Missouri | $24,020 | 46 | |||||
| Adams County | Idaho | $24,141 | 47 | |||||
| Mora County | New Mexico | $24,159 | 48 | |||||
| Bullock County | Alabama | $24,164 | 49 | |||||
| Oregon County | Missouri | $24,249 | 50 | |||||