The median income of Randolph County residents was $28,650 per year, adjusted for inflation. It had 11,883 households with a population of 32,295.
The county with the highest median resident income in the state was DuPage County with $41,943 per year after adjusting for inflation – $13,293 more than Randolph County. It had 342,791 households with a population of 929,060.
The county with the lowest median resident income in the state was McDonough County with $21,047 per year after adjusting for inflation – $7,603 less than Randolph County. It had 11,408 households with a population of 30,479.
Top 100 counties by earnings per resident (2019)
| Rank | County | Earnings per resident |
|---|---|---|
| 1 | DuPage County | $41,943 |
| 2 | Monroe County | $41,254 |
| 3 | Kendall County | $40,170 |
| 4 | Grundy County | $40,057 |
| 4 | Menard County | $40,057 |
| 6 | McHenry County | $39,390 |
| 7 | Lake County | $37,491 |
| 8 | Will County | $37,319 |
| 9 | Piatt County | $36,317 |
| 10 | Washington County | $35,549 |
| 11 | Woodford County | $35,400 |
| 12 | Sangamon County | $34,933 |
| 13 | Clinton County | $34,187 |
| 14 | Tazewell County | $33,800 |
| 15 | Kane County | $33,731 |
| 16 | McLean County | $33,417 |
| 17 | Cook County | $32,955 |
| 18 | Putnam County | $32,691 |
| 19 | Moultrie County | $31,856 |
| 20 | Ogle County | $31,666 |
| 21 | Madison County | $31,555 |
| 22 | Clark County | $31,515 |
| 23 | Jersey County | $31,247 |
| 24 | Mercer County | $31,234 |
| 25 | Henry County | $31,155 |
| 26 | Jo Daviess County | $30,920 |
| 27 | Rock Island County | $30,830 |
| 28 | Lee County | $30,779 |
| 29 | Brown County | $30,690 |
| 30 | Peoria County | $30,634 |
| 31 | Adams County | $30,499 |
| 32 | Logan County | $30,474 |
| 33 | Douglas County | $30,459 |
| 34 | Marshall County | $30,372 |
| 35 | Effingham County | $30,369 |
| 36 | St. Clair County | $30,310 |
| 37 | Boone County | $30,257 |
| 38 | Scott County | $30,248 |
| 39 | Ford County | $30,083 |
| 40 | Christian County | $30,053 |
| 41 | Shelby County | $29,644 |
| 42 | Cass County | $29,595 |
| 43 | Stark County | $29,537 |
| 44 | LaSalle County | $29,484 |
| 45 | Cumberland County | $29,450 |
| 46 | Edwards County | $29,449 |
| 47 | Schuyler County | $29,440 |
| 48 | Macoupin County | $29,329 |
| 49 | De Witt County | $29,287 |
| 50 | Livingston County | $29,147 |
| 51 | Bureau County | $29,091 |
| 52 | Carroll County | $29,036 |
| 53 | Hancock County | $29,026 |
| 54 | Randolph County | $28,650 |
| 55 | Champaign County | $28,603 |
| 56 | Wayne County | $28,537 |
| 57 | Johnson County | $28,494 |
| 58 | Hamilton County | $28,482 |
| 59 | Winnebago County | $28,400 |
| 60 | DeKalb County | $28,262 |
| 61 | Macon County | $28,225 |
| 62 | Edgar County | $27,974 |
| 63 | Whiteside County | $27,944 |
| 64 | Calhoun County | $27,843 |
| 65 | Perry County | $27,754 |
| 66 | Union County | $27,669 |
| 67 | Kankakee County | $27,619 |
| 68 | Vermilion County | $27,550 |
| 69 | Williamson County | $27,489 |
| 70 | Henderson County | $27,336 |
| 71 | Montgomery County | $27,335 |
| 72 | Richland County | $27,334 |
| 73 | Stephenson County | $27,178 |
| 74 | Bond County | $27,042 |
| 75 | Pike County | $27,016 |
| 76 | Morgan County | $26,917 |
| 77 | Iroquois County | $26,890 |
| 78 | Jasper County | $26,881 |
| 79 | Fulton County | $26,843 |
| 80 | Clay County | $26,802 |
| 81 | Warren County | $26,774 |
| 82 | Mason County | $26,764 |
| 83 | Jefferson County | $26,679 |
| 84 | Crawford County | $26,611 |
| 85 | Wabash County | $26,544 |
| 86 | Gallatin County | $26,342 |
| 87 | Marion County | $26,237 |
| 88 | Lawrence County | $25,994 |
| 89 | Greene County | $25,938 |
| 90 | White County | $25,687 |
| 91 | Knox County | $25,366 |
| 92 | Coles County | $25,029 |
| 93 | Fayette County | $24,407 |
| 94 | Franklin County | $24,243 |
| 95 | Saline County | $24,185 |
| 96 | Massac County | $23,617 |
| 97 | Hardin County | $23,420 |
| 98 | Alexander County | $21,845 |
| 99 | Pulaski County | $21,208 |
| 100 | Pope County | $21,153 |
* All values are inflation-adjusted
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