The median income of Irwin County residents was an inflation-adjusted $20,642 per year. Irwin County had 3,323 households in 2017, with a population of 9,278.
The county with the highest median resident income in the state was Forsyth County. Forsyth County's median income was $41,295 per year after adjusting for inflation – $20,653 more than Irwin County. It had 70,468 households in 2017 and a population of 211,300.
Clay County had the lowest annual resident income among counties in Georgia, with a median income of only $16,588 per year. That was $4,054 less than the median income in Irwin County at the time. Clay County had 1,154 households in 2017 and a population of 3,024.
The table below shows the top 100 counties ranked by median annual resident earnings in 2017.
| Rank | County | Earnings per resident ($$$) |
|---|---|---|
| 1 | Forsyth County | 41,295 |
| 2 | Fayette County | 40,369 |
| 3 | Lee County | 34,907 |
| 4 | Columbia County | 34,808 |
| 5 | Cobb County | 34,774 |
| 6 | Oconee County | 34,724 |
| 7 | Cherokee County | 33,998 |
| 8 | Fulton County | 33,168 |
| 9 | Bryan County | 32,989 |
| 10 | Coweta County | 32,273 |
| 11 | Paulding County | 31,753 |
| 12 | Henry County | 31,218 |
| 13 | Harris County | 31,075 |
| 14 | Effingham County | 31,002 |
| 15 | Gwinnett County | 30,594 |
| 16 | DeKalb County | 30,152 |
| 17 | Houston County | 29,968 |
| 18 | Dawson County | 29,370 |
| 19 | Jones County | 28,832 |
| 20 | Rockdale County | 28,364 |
| 21 | Douglas County | 28,276 |
| 22 | Pickens County | 28,232 |
| 23 | Walton County | 27,802 |
| 24 | Jackson County | 27,529 |
| 25 | Pike County | 27,451 |
| 26 | Liberty County | 27,066 |
| 27 | Baker County | 26,860 |
| 28 | Camden County | 26,796 |
| 29 | Chatham County | 26,788 |
| 30 | Catoosa County | 26,600 |
| 31 | Morgan County | 26,492 |
| 32 | Barrow County | 26,446 |
| 33 | Bartow County | 26,274 |
| 34 | Hall County | 26,060 |
| 35 | Long County | 26,042 |
| 36 | Glynn County | 25,675 |
| 37 | Newton County | 25,524 |
| 38 | Madison County | 25,375 |
| 39 | Schley County | 25,253 |
| 40 | Peach County | 25,245 |
| 41 | McIntosh County | 25,238 |
| 42 | Monroe County | 24,618 |
| 43 | Putnam County | 24,417 |
| 44 | Crawford County | 24,334 |
| 45 | Chattahoochee County | 23,924 |
| 46 | Clayton County | 23,909 |
| 47 | Echols County | 23,849 |
| 48 | Haralson County | 23,849 |
| 49 | Gordon County | 23,844 |
| 50 | Whitfield County | 23,721 |
| 51 | Turner County | 23,609 |
| 52 | Webster County | 23,370 |
| 53 | Muscogee County | 23,248 |
| 54 | Decatur County | 23,185 |
| 55 | Evans County | 23,090 |
| 56 | Miller County | 23,083 |
| 57 | White County | 23,008 |
| 58 | Heard County | 22,931 |
| 59 | Troup County | 22,787 |
| 60 | Habersham County | 22,785 |
| 61 | Carroll County | 22,777 |
| 62 | Greene County | 22,750 |
| 63 | Brooks County | 22,725 |
| 64 | Union County | 22,709 |
| 65 | Glascock County | 22,697 |
| 66 | Tift County | 22,696 |
| 67 | Berrien County | 22,610 |
| 68 | Oglethorpe County | 22,589 |
| 69 | Lincoln County | 22,565 |
| 70 | Floyd County | 22,485 |
| 71 | Thomas County | 22,473 |
| 72 | Bibb County | 22,449 |
| 73 | Bleckley County | 22,435 |
| 74 | Fannin County | 22,423 |
| 75 | Jeff Davis County | 22,396 |
| 76 | Seminole County | 22,375 |
| 77 | Murray County | 22,199 |
| 78 | Polk County | 22,196 |
| 79 | Rabun County | 22,195 |
| 80 | Pierce County | 22,184 |
| 81 | Walker County | 22,144 |
| 82 | Chattooga County | 22,053 |
| 83 | Dodge County | 22,032 |
| 84 | Hart County | 22,022 |
| 85 | Burke County | 22,002 |
| 86 | McDuffie County | 21,921 |
| 87 | Spalding County | 21,887 |
| 88 | Grady County | 21,806 |
| 89 | Gilmer County | 21,752 |
| 90 | Bacon County | 21,665 |
| 91 | Coffee County | 21,613 |
| 92 | Worth County | 21,579 |
| 93 | Toombs County | 21,539 |
| 94 | Lowndes County | 21,516 |
| 95 | Ware County | 21,511 |
| 96 | Dade County | 21,506 |
| 97 | Laurens County | 21,486 |
| 98 | Richmond County | 21,369 |
| 99 | Wilcox County | 21,348 |
| 100 | Wilkinson County | 21,289 |
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