| County | Rank | Change (2020) ↓ | 2026 Pop. | 2020 Pop. |
|---|---|---|---|---|
| Benton County | 1 | 18.69% | 340,202 | 286,621 |
| Washington County | 2 | 11.35% | 274,792 | 246,779 |
| Madison County | 3 | 9.06% | 18,061 | 16,560 |
| Faulkner County | 4 | 9.04% | 135,015 | 123,820 |
| Saline County | 5 | 8.73% | 134,624 | 123,820 |
| Sharp County | 6 | 6.74% | 18,482 | 17,315 |
| Craighead County | 7 | 6.67% | 119,066 | 111,623 |
| Izard County | 8 | 6.36% | 14,469 | 13,604 |
| Conway County | 9 | 6.25% | 22,030 | 20,734 |
| Fulton County | 10 | 6.17% | 12,794 | 12,051 |
| Marion County | 11 | 5.58% | 17,809 | 16,867 |
| Stone County | 12 | 5.3% | 13,001 | 12,347 |
| Cleburne County | 13 | 5.14% | 25,986 | 24,716 |
| Crawford County | 14 | 4.98% | 63,154 | 60,160 |
| Grant County | 15 | 4.63% | 18,854 | 18,019 |
| Lonoke County | 16 | 4.38% | 77,319 | 74,072 |
| White County | 17 | 4.38% | 80,227 | 76,863 |
| Baxter County | 18 | 4.23% | 43,459 | 41,696 |
| Carroll County | 19 | 4.2% | 29,428 | 28,241 |
| Boone County | 20 | 3.97% | 38,876 | 37,393 |
| Franklin County | 21 | 3.94% | 17,816 | 17,141 |
| Randolph County | 22 | 3.76% | 19,294 | 18,595 |
| Perry County | 23 | 3.74% | 10,377 | 10,003 |
| Greene County | 24 | 3.32% | 47,384 | 45,861 |
| Sebastian County | 25 | 3.04% | 131,699 | 127,813 |
| Pope County | 26 | 2.77% | 65,161 | 63,407 |
| Logan County | 27 | 2.57% | 21,651 | 21,109 |
| Van Buren County | 28 | 2.25% | 16,152 | 15,797 |
| Johnson County | 29 | 1.82% | 26,194 | 25,727 |
| Lawrence County | 30 | 1.54% | 16,465 | 16,216 |
| Independence County | 31 | 1.14% | 38,377 | 37,945 |
| Hot Spring County | 32 | 1.04% | 33,421 | 33,076 |
| Pulaski County | 33 | 0.73% | 402,219 | 399,286 |
| Sevier County | 34 | 0.73% | 15,897 | 15,782 |
| Polk County | 35 | 0.71% | 19,322 | 19,186 |
| Searcy County | 36 | 0.36% | 7,872 | 7,844 |
| Yell County | 37 | 0.29% | 20,276 | 20,217 |
| Calhoun County | 38 | 0.13% | 4,742 | 4,736 |
| Scott County | 39 | 0.1% | 9,839 | 9,829 |
| Garland County | 40 | -0.08% | 100,188 | 100,266 |
| Lincoln County | 41 | -0.67% | 12,804 | 12,890 |
| Jackson County | 42 | -1.42% | 16,521 | 16,759 |
| Montgomery County | 43 | -1.93% | 8,320 | 8,484 |
| Clark County | 44 | -2.24% | 20,924 | 21,403 |
| Drew County | 45 | -2.78% | 16,833 | 17,315 |
| Cleveland County | 46 | -2.98% | 7,329 | 7,554 |
| Miller County | 47 | -3.09% | 41,270 | 42,586 |
| Poinsett County | 48 | -3.49% | 22,154 | 22,955 |
| Newton County | 49 | -3.84% | 6,920 | 7,196 |
| Pike County | 50 | -3.97% | 9,753 | 10,156 |
| Clay County | 51 | -3.99% | 13,954 | 14,534 |
| Jefferson County | 52 | -4.33% | 63,938 | 66,835 |
| Columbia County | 53 | -4.65% | 21,686 | 22,743 |
| Howard County | 54 | -4.68% | 12,161 | 12,758 |
| Ouachita County | 55 | -5.09% | 21,466 | 22,617 |
| Little River County | 56 | -5.22% | 11,346 | 11,971 |
| Crittenden County | 57 | -5.27% | 45,557 | 48,090 |
| Prairie County | 58 | -5.65% | 7,781 | 8,247 |
| Nevada County | 59 | -6.36% | 7,760 | 8,287 |
| Hempstead County | 60 | -6.57% | 18,673 | 19,986 |
| Lafayette County | 61 | -6.58% | 5,881 | 6,295 |
| Cross County | 62 | -6.7% | 15,676 | 16,801 |
| Union County | 63 | -7.02% | 36,206 | 38,940 |
| St. Francis County | 64 | -7.32% | 21,334 | 23,019 |
| Lee County | 65 | -7.74% | 7,870 | 8,530 |
| Ashley County | 66 | -7.78% | 17,488 | 18,963 |
| Bradley County | 67 | -8.63% | 9,587 | 10,492 |
| Mississippi County | 68 | -8.71% | 37,015 | 40,545 |
| Monroe County | 69 | -8.95% | 6,165 | 6,771 |
| Arkansas County | 70 | -9.03% | 15,560 | 17,104 |
| Dallas County | 71 | -9.11% | 5,854 | 6,441 |
| Woodruff County | 72 | -10.85% | 5,546 | 6,221 |
| Desha County | 73 | -11.61% | 10,007 | 11,321 |
| Chicot County | 74 | -13.36% | 8,802 | 10,159 |
| Phillips County | 75 | -14.84% | 14,001 | 16,441 |
Arkansas's counties show varied growth patterns from 2020 to 2026. Benton County leads with 2.9% annualized growth, followed by Washington County (1.81%) and Madison County (1.46%). The largest counties are Pulaski County (402,219), Benton County (340,202), and Washington County (274,792). Of the 75 counties in Arkansas, 39 are growing while 36 have experienced population decline. Overall, counties averaged -0.13% annualized growth, with total population growing by 0.61% annually.
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