| County | FIPS Code | County Seat | Established in | License Plate Prefix | Population | Area (sq mi) | Area (km2) |
|---|---|---|---|---|---|---|---|
| Adams County | 1 | Hastings | 1867 | 14 | 31,610 | 563 | 1,458 |
| Antelope County | 3 | Neligh | 1871 | 26 | 6,456 | 857 | 2,220 |
| Arthur County | 5 | Arthur | 1913 | 91 | 458 | 715 | 1,852 |
| Banner County | 7 | Harrisburg | 1888 | 85 | 759 | 746 | 1,932 |
| Blaine County | 9 | Brewster | 1885 | 86 | 482 | 711 | 1,841 |
| Boone County | 11 | Albion | 1871 | 23 | 5,388 | 687 | 1,779 |
| Box Butte County | 13 | Alliance | 1887 | 65 | 11,305 | 1,075 | 2,784 |
| Boyd County | 15 | Butte | 1891 | 63 | 2,032 | 540 | 1,399 |
| Brown County | 17 | Ainsworth | 1883 | 75 | 2,926 | 1,221 | 3,162 |
| Buffalo County | 19 | Kearney | 1855 | 9 | 47,893 | 968 | 2,507 |
| Burt County | 21 | Tekamah | 1854 | 31 | 6,574 | 493 | 1,277 |
| Butler County | 23 | David City | 1856 | 25 | 8,312 | 584 | 1,513 |
| Cass County | 25 | Plattsmouth | 1854 | 20 | 25,357 | 559 | 1,448 |
| Cedar County | 27 | Hartington | 1857 | 13 | 8,711 | 740 | 1,917 |
| Chase County | 29 | Imperial | 1873 | 72 | 4,000 | 894 | 2,315 |
| Cherry County | 31 | Valentine | 1883 | 66 | 5,788 | 5,961 | 15,439 |
| Cheyenne County | 33 | Sidney | 1867 | 39 | 10,091 | 1,196 | 3,098 |
| Clay County | 35 | Clay Center | 1855 | 30 | 6,392 | 573 | 1,484 |
| Colfax County | 37 | Schuyler | 1869 | 43 | 10,425 | 413 | 1,070 |
| Cuming County | 39 | West Point | 1855 | 24 | 8,996 | 572 | 1,481 |
| Custer County | 41 | Broken Bow | 1877 | 4 | 10,792 | 2,576 | 6,672 |
| Dakota County | 43 | Dakota City | 1855 | 70 | 20,947 | 264 | 684 |
| Dawes County | 45 | Chadron | 1885 | 69 | 9,088 | 1,396 | 3,616 |
| Dawson County | 47 | Lexington | 1860 | 18 | 24,207 | 1,013 | 2,624 |
| Deuel County | 49 | Chappell | 1888 | 78 | 1,937 | 440 | 1,140 |
| Dixon County | 51 | Ponca | 1856 | 35 | 5,851 | 476 | 1,233 |
| Dodge County | 53 | Fremont | 1854 | 5 | 36,515 | 534 | 1,383 |
| Douglas County | 55 | Omaha | 1854 | 1 | 537,256 | 331 | 857 |
| Dundy County | 57 | Benkelman | 1873 | 76 | 1,981 | 920 | 2,383 |
| Fillmore County | 59 | Geneva | 1856 | 34 | 5,698 | 576 | 1,492 |
| Franklin County | 61 | Franklin | 1867 | 50 | 3,085 | 576 | 1,492 |
| Frontier County | 63 | Stockville | 1872 | 60 | 2,709 | 975 | 2,525 |
| Furnas County | 65 | Beaver City | 1873 | 38 | 4,865 | 718 | 1,860 |
| Gage County | 67 | Beatrice | 1855 | 3 | 21,864 | 855 | 2,214 |
| Garden County | 69 | Oshkosh | 1910 | 77 | 1,902 | 1,705 | 4,416 |
| Garfield County | 71 | Burwell | 1884 | 83 | 2,035 | 570 | 1,476 |
| Gosper County | 73 | Elwood | 1873 | 73 | 1,972 | 458 | 1,186 |
| Grant County | 75 | Hyannis | 1887 | 92 | 633 | 776 | 2,010 |
| Greeley County | 77 | Greeley | 1871 | 62 | 2,494 | 570 | 1,476 |
| Hall County | 79 | Grand Island | 1858 | 8 | 60,720 | 546 | 1,414 |
| Hamilton County | 81 | Aurora | 1867 | 28 | 9,112 | 544 | 1,409 |
| Harlan County | 83 | Alma | 1871 | 51 | 3,513 | 553 | 1,432 |
| Hayes County | 85 | Hayes Center | 1877 | 79 | 976 | 713 | 1,847 |
| Hitchcock County | 87 | Trenton | 1873 | 67 | 2,872 | 710 | 1,839 |
| Holt County | 89 | O'Neill | 1860 | 36 | 10,449 | 2,413 | 6,250 |
| Hooker County | 91 | Mullen | 1889 | 93 | 738 | 721 | 1,867 |
| Howard County | 93 | Saint Paul | 1871 | 49 | 6,355 | 570 | 1,476 |
| Jefferson County | 95 | Fairbury | 1856 | 33 | 7,560 | 573 | 1,484 |
| Johnson County | 97 | Tecumseh | 1857 | 57 | 5,144 | 376 | 974 |
| Kearney County | 99 | Minden | 1860 | 52 | 6,548 | 516 | 1,336 |
| Keith County | 101 | Ogallala | 1873 | 68 | 8,130 | 1,061 | 2,748 |
| Keya Paha County | 103 | Springview | 1884 | 82 | 790 | 773 | 2,002 |
| Kimball County | 105 | Kimball | 1888 | 71 | 3,702 | 952 | 2,466 |
| Knox County | 107 | Center | 1857 | 12 | 8,565 | 1,108 | 2,870 |
| Lancaster County | 109 | Lincoln | 1855 | 2 | 297,036 | 839 | 2,173 |
| Lincoln County | 111 | North Platte | 1860 | 15 | 36,051 | 2,564 | 6,641 |
| Logan County | 113 | Stapleton | 1885 | 87 | 763 | 571 | 1,479 |
| Loup County | 115 | Taylor | 1883 | 88 | 576 | 570 | 1,476 |
| Madison County | 119 | Madison | 1856 | 7 | 35,278 | 573 | 1,484 |
| McPherson County | 117 | Tryon | 1887 | 90 | 526 | 859 | 2,225 |
| Merrick County | 121 | Central City | 1858 | 46 | 7,802 | 485 | 1,256 |
| Morrill County | 123 | Bridgeport | 1908 | 64 | 4,908 | 1,424 | 3,688 |
| Nance County | 125 | Fullerton | 1879 | 58 | 3,623 | 441 | 1,142 |
| Nemaha County | 127 | Auburn | 1854 | 44 | 7,157 | 409 | 1,059 |
| Nuckolls County | 129 | Nelson | 1860 | 42 | 4,413 | 575 | 1,489 |
| Otoe County | 131 | Nebraska City | 1854 | 11 | 15,752 | 616 | 1,595 |
| Pawnee County | 133 | Pawnee City | 1855 | 54 | 2,709 | 432 | 1,119 |
| Perkins County | 135 | Grant | 1887 | 74 | 2,921 | 883 | 2,287 |
| Phelps County | 137 | Holdrege | 1873 | 37 | 9,213 | 540 | 1,399 |
| Pierce County | 139 | Pierce | 1856 | 40 | 7,510 | 574 | 1,487 |
| Platte County | 141 | Columbus | 1856 | 10 | 32,505 | 678 | 1,756 |
| Polk County | 143 | Osceola | 1856 | 41 | 5,275 | 439 | 1,137 |
| Red Willow County | 145 | McCook | 1873 | 48 | 11,006 | 717 | 1,857 |
| Richardson County | 147 | Falls City | 1854 | 19 | 8,125 | 554 | 1,435 |
| Rock County | 149 | Bassett | 1885 | 81 | 1,411 | 1,008 | 2,611 |
| Saline County | 151 | Wilber | 1867 | 22 | 14,416 | 575 | 1,489 |
| Sarpy County | 153 | Papillion | 1857 | 59 | 169,331 | 241 | 624 |
| Saunders County | 155 | Wahoo | 1856 | 6 | 20,929 | 754 | 1,953 |
| Scotts Bluff County | 157 | Gering | 1888 | 21 | 36,848 | 739 | 1,914 |
| Seward County | 159 | Seward | 1855 | 16 | 17,089 | 575 | 1,489 |
| Sheridan County | 161 | Rushville | 1885 | 61 | 5,251 | 2,441 | 6,322 |
| Sherman County | 163 | Loup City | 1871 | 56 | 3,106 | 566 | 1,466 |
| Sioux County | 165 | Harrison | 1877 | 80 | 1,475 | 1,313 | 3,401 |
| Stanton County | 167 | Stanton | 1855 | 53 | 6,133 | 430 | 1,114 |
| Thayer County | 169 | Hebron | 1871 | 32 | 5,189 | 575 | 1,489 |
| Thomas County | 171 | Thedford | 1887 | 89 | 699 | 713 | 1,847 |
| Thurston County | 173 | Pender | 1889 | 55 | 6,895 | 394 | 1,020 |
| Valley County | 175 | Ord | 1871 | 47 | 4,193 | 568 | 1,471 |
| Washington County | 177 | Blair | 1854 | 29 | 20,223 | 390 | 1,010 |
| Wayne County | 179 | Wayne | 1867 | 27 | 9,411 | 444 | 1,150 |
| Webster County | 181 | Red Cloud | 1867 | 45 | 3,688 | 575 | 1,489 |
| Wheeler County | 183 | Bartlett | 1877 | 84 | 759 | 575 | 1,489 |
| York County | 185 | York | 1855 | 17 | 13,883 | 576 | 1,492 |
