| County | Rank | Change (2020) ↓ | 2025 Pop. | 2020 Pop. |
|---|---|---|---|---|
| Benton County | 1 | 14.23% | 327,395 | 286,618 |
| Madison County | 2 | 11.21% | 18,399 | 16,545 |
| Washington County | 3 | 9.93% | 271,283 | 246,774 |
| Faulkner County | 4 | 8.81% | 134,723 | 123,820 |
| Saline County | 5 | 8.13% | 133,892 | 123,826 |
| Marion County | 6 | 6.47% | 17,964 | 16,873 |
| Izard County | 7 | 6.23% | 14,449 | 13,602 |
| Crawford County | 8 | 5.73% | 63,591 | 60,142 |
| Sharp County | 9 | 5.3% | 18,232 | 17,314 |
| Grant County | 10 | 4.85% | 18,891 | 18,018 |
| Baxter County | 11 | 4.72% | 43,655 | 41,686 |
| Lonoke County | 12 | 4.56% | 77,434 | 74,055 |
| Cleburne County | 13 | 4.55% | 25,829 | 24,704 |
| Boone County | 14 | 4.41% | 39,030 | 37,381 |
| White County | 15 | 4.25% | 80,124 | 76,860 |
| Franklin County | 16 | 4.23% | 17,864 | 17,139 |
| Craighead County | 17 | 4.15% | 116,253 | 111,619 |
| Fulton County | 18 | 4.14% | 12,553 | 12,054 |
| Perry County | 19 | 4.09% | 10,406 | 9,997 |
| Stone County | 20 | 4% | 12,843 | 12,349 |
| Pope County | 21 | 3.57% | 65,673 | 63,410 |
| Montgomery County | 22 | 3.41% | 8,774 | 8,485 |
| Greene County | 23 | 3.38% | 47,413 | 45,864 |
| Johnson County | 24 | 2.81% | 26,447 | 25,724 |
| Logan County | 25 | 2.77% | 21,684 | 21,100 |
| Carroll County | 26 | 2.72% | 29,008 | 28,240 |
| Van Buren County | 27 | 2.66% | 16,220 | 15,799 |
| Polk County | 28 | 2.41% | 19,640 | 19,177 |
| Randolph County | 29 | 2.27% | 19,017 | 18,595 |
| Conway County | 30 | 2.21% | 21,189 | 20,730 |
| Lawrence County | 31 | 2.15% | 16,566 | 16,218 |
| Jackson County | 32 | 1.69% | 17,044 | 16,761 |
| Pike County | 33 | 1.42% | 10,306 | 10,162 |
| Independence County | 34 | 1.35% | 38,452 | 37,940 |
| Scott County | 35 | 1.29% | 9,961 | 9,834 |
| Hot Spring County | 36 | 1.21% | 33,476 | 33,075 |
| Sebastian County | 37 | 0.99% | 129,076 | 127,808 |
| Pulaski County | 38 | 0.5% | 401,253 | 399,274 |
| Lincoln County | 39 | -0.12% | 12,874 | 12,890 |
| Clark County | 40 | -0.54% | 21,270 | 21,385 |
| Garland County | 41 | -0.87% | 99,388 | 100,258 |
| Yell County | 42 | -1.3% | 19,950 | 20,212 |
| Miller County | 43 | -1.31% | 42,029 | 42,588 |
| Crittenden County | 44 | -1.58% | 47,315 | 48,076 |
| Drew County | 45 | -1.74% | 17,011 | 17,313 |
| Sevier County | 46 | -2.27% | 15,420 | 15,778 |
| Little River County | 47 | -2.41% | 11,685 | 11,974 |
| Newton County | 48 | -2.57% | 7,011 | 7,196 |
| Poinsett County | 49 | -2.91% | 22,285 | 22,954 |
| Searcy County | 50 | -2.98% | 7,606 | 7,840 |
| Howard County | 51 | -3.15% | 12,355 | 12,757 |
| Clay County | 52 | -3.22% | 14,061 | 14,529 |
| Nevada County | 53 | -3.4% | 8,002 | 8,284 |
| Prairie County | 54 | -3.58% | 7,954 | 8,249 |
| Columbia County | 55 | -3.81% | 21,878 | 22,744 |
| Calhoun County | 56 | -3.95% | 4,549 | 4,736 |
| Lafayette County | 57 | -4.23% | 6,027 | 6,293 |
| Cross County | 58 | -4.26% | 16,080 | 16,795 |
| Dallas County | 59 | -4.36% | 6,163 | 6,444 |
| Ashley County | 60 | -4.57% | 18,090 | 18,957 |
| Hempstead County | 61 | -4.61% | 19,067 | 19,989 |
| Cleveland County | 62 | -4.66% | 7,200 | 7,552 |
| Bradley County | 63 | -4.95% | 9,976 | 10,495 |
| Ouachita County | 64 | -5.41% | 21,391 | 22,615 |
| Monroe County | 65 | -5.55% | 6,400 | 6,776 |
| Mississippi County | 66 | -5.61% | 38,263 | 40,538 |
| Union County | 67 | -6.08% | 36,565 | 38,931 |
| St. Francis County | 68 | -6.61% | 21,499 | 23,021 |
| Jefferson County | 69 | -6.64% | 62,393 | 66,830 |
| Arkansas County | 70 | -6.91% | 15,925 | 17,107 |
| Woodruff County | 71 | -7.17% | 5,778 | 6,224 |
| Lee County | 72 | -7.71% | 7,869 | 8,526 |
| Chicot County | 73 | -11.91% | 8,946 | 10,156 |
| Desha County | 74 | -12.39% | 9,921 | 11,324 |
| Phillips County | 75 | -13.73% | 14,183 | 16,440 |
Arkansas's counties show varied growth patterns from 2020 to 2025. Benton County leads with 14.23% annualized growth, followed by Madison County (11.21%) and Washington County (9.93%). The largest counties are Pulaski County (401,253), Benton County (327,395), and Washington County (271,283). Of the 75 counties in Arkansas, 38 are growing while 37 have experienced population decline. Overall, counties averaged -0.08% annualized growth, with total population growing by 3.19% annually.