The median income of Grundy County residents was an inflation-adjusted $15,981 per year. Grundy County had 4,894 households in 2017, with a population of 13,359.
The county with the highest median resident income in the state was Williamson County. Williamson County's median income was $42,496 per year after adjusting for inflation – $26,515 more than Grundy County. It had 73,160 households in 2017 and a population of 212,161.
Fentress County had the lowest annual resident income among counties in Tennessee, with a median income of only $15,980 per year. That was $1 less than the median income in Grundy County at the time. Fentress County had 7,385 households in 2017 and a population of 17,940.
The table below shows the state's counties ranked by median annual resident earnings in 2017.
| Rank | County | Earnings per resident ($$$) |
|---|---|---|
| 1 | Williamson County | 42,496 |
| 2 | Wilson County | 33,002 |
| 3 | Rutherford County | 30,492 |
| 4 | Sumner County | 30,223 |
| 5 | Davidson County | 30,041 |
| 6 | Robertson County | 29,198 |
| 7 | Montgomery County | 28,264 |
| 8 | Cheatham County | 28,255 |
| 9 | Moore County | 28,088 |
| 10 | Fayette County | 28,002 |
| 11 | Tipton County | 27,810 |
| 12 | Knox County | 26,972 |
| 13 | Maury County | 26,774 |
| 14 | Loudon County | 26,508 |
| 15 | Shelby County | 26,314 |
| 16 | Hamilton County | 26,269 |
| 17 | Marshall County | 25,843 |
| 18 | Blount County | 25,185 |
| 19 | Dickson County | 25,139 |
| 20 | Cannon County | 25,002 |
| 21 | Smith County | 24,904 |
| 22 | Lincoln County | 24,527 |
| 23 | Madison County | 24,466 |
| 24 | Dyer County | 24,388 |
| 25 | Bradley County | 24,384 |
| 26 | Anderson County | 24,066 |
| 27 | Coffee County | 24,035 |
| 28 | Bedford County | 24,018 |
| 29 | Polk County | 23,539 |
| 30 | Henderson County | 23,431 |
| 31 | Roane County | 23,389 |
| 32 | Washington County | 23,043 |
| 33 | Giles County | 23,012 |
| 34 | Trousdale County | 23,009 |
| 35 | DeKalb County | 22,926 |
| 36 | Stewart County | 22,623 |
| 37 | Sullivan County | 22,594 |
| 38 | Franklin County | 22,427 |
| 39 | Crockett County | 22,369 |
| 40 | Lawrence County | 22,351 |
| 41 | Chester County | 22,200 |
| 42 | Cumberland County | 22,122 |
| 43 | Grainger County | 22,117 |
| 44 | Sevier County | 22,110 |
| 45 | Hamblen County | 22,059 |
| 46 | Marion County | 21,976 |
| 47 | Gibson County | 21,905 |
| 48 | Union County | 21,887 |
| 49 | Humphreys County | 21,879 |
| 50 | Sequatchie County | 21,804 |
| 51 | Warren County | 21,781 |
| 52 | Obion County | 21,763 |
| 53 | Henry County | 21,718 |
| 54 | Jefferson County | 21,667 |
| 55 | Meigs County | 21,658 |
| 56 | Haywood County | 21,658 |
| 57 | Rhea County | 21,290 |
| 58 | Putnam County | 21,232 |
| 59 | Houston County | 21,178 |
| 60 | Decatur County | 21,069 |
| 61 | Hawkins County | 20,990 |
| 62 | Macon County | 20,958 |
| 63 | Overton County | 20,938 |
| 64 | McMinn County | 20,867 |
| 65 | Bledsoe County | 20,816 |
| 66 | Pickett County | 20,801 |
| 67 | Hickman County | 20,780 |
| 68 | Van Buren County | 20,746 |
| 69 | Greene County | 20,732 |
| 70 | Monroe County | 20,689 |
| 71 | Hardin County | 20,645 |
| 72 | Lewis County | 20,592 |
| 73 | Morgan County | 20,386 |
| 74 | Lauderdale County | 20,372 |
| 75 | Weakley County | 20,094 |
| 76 | Carroll County | 20,044 |
| 77 | White County | 19,854 |
| 78 | Campbell County | 19,612 |
| 79 | Unicoi County | 19,529 |
| 80 | McNairy County | 19,243 |
| 81 | Claiborne County | 19,243 |
| 82 | Carter County | 19,205 |
| 83 | Cocke County | 19,181 |
| 84 | Benton County | 19,131 |
| 85 | Hardeman County | 18,918 |
| 86 | Wayne County | 18,794 |
| 87 | Perry County | 18,726 |
| 88 | Scott County | 18,682 |
| 89 | Clay County | 18,331 |
| 90 | Jackson County | 18,122 |
| 91 | Hancock County | 17,102 |
| 92 | Lake County | 16,770 |
| 93 | Johnson County | 16,572 |
| 94 | Grundy County | 15,981 |
| 95 | Fentress County | 15,980 |
Alerts Sign-up