Nebraska Highway 20 crosses Northern Nebraska in the following Counties Antelope County Nebraska prefix 26 Population: 6,293 (2022) Area: 858 mi² County Seat: Neligh Towns: Brunswick Clearwater, Elgin, Neligh, Oakdale, Orchard, Royal, Box Butte County Nebraska prefix 21 Area: 1,078 mi² County seat: Alliance Towns: Alliance, Berea Hemingford, Boyd County Nebraska prefix 63 Population: 1,741 (2022) Area: 545 mi² County seat: Butte Towns: Anoka, Bristow, Butte, Gross, Lynch, Monowi, Naper,  Spencer Brown County Nebraska prefix 61 Population: 2,872 (2022) Area: 1,225 mi² County seat: Ainsworth Towns: Long Pine, Ainsworth, Johnstown Cedar County Nebraska prefix 13 Population: 8,371 (2022) Area: 746 mi² County seat: Hartington Towns: Aten, Belden, Coleridge, Fordyce, Hartington, Laurel,  Magnet, Obert, Randolph, Saint Helena,  Wynot Cherry County Nebraska prefix 66 Population: 5,464 (2022) Area: 6,010 mi² County seat: Valentine Towns: Valentine, Crookston, Wood Lake, Kilgore, Nenzel, Merriman, Brownlee, Cody, Sparks Dakota County Nebraska prefix 70 Population: 21,042 (2022) Area: 267 mi² County seat: Dakota City Towns: Dakota City, South Sioux City, Homer, Jackson, Hubbard, Willis Dawes County Nebraska prefix 69 Population: 8,241 (2022) Area: 1,401 mi² County seat: Chadron Towns: Crawford, Chadron, Whitney Dixon County Nebraska prefix 35 Population: 5,464 (2022) County seat: Ponca Towns: Dixon, Ponca, Concord, Newcastle, Allen, Martinsburg, Maskell, Waterbury Holt County Nebraska prefix 36 Population: 10,043 (2022) Area: 2,418 mi² County seat: O’Neill Towns: O’Neill, Atkinson, Stuart, Chambers, Ewing, Page, Inman, Emmet Keya Paha County Nebraska prefix 82 Population: 787 (2022) Area: 774 mi² County seat: Springview Towns: Springview, Burton Knox County Nebraska prefix 12 Population: 8,336 (2022) Area: 1,140 mi² County seat: Center Towns: Bazile Mills, Bloomfield, Center, Creighton, Crofton, Lindy Niobrara, Santee, Verdel,  Verdigre, Wausa, Winnetoon Pierce County Nebraska prefix 40 Population: 7,332 (2022) Area: 575 mi² County seat: Pierce Towns: Pierce, Plainview, Osmond, Hadar, McLean, Foster Rock County Nebraska prefix 75 Population: 1,245 (2022) Area: 1,012 mi² County seat: Bassett Towns: Bassett, Newport Sheridan County Nebraska prefix 61 Population: 4,996 (2022) Area: 2,470 mi² County seat: Rushville Towns: Rushville, Gordon, Hay Springs, Whiteclay, Ellsworth, Clinton Sioux County Nebraska prefix 80 Population: 1,127 (2022) Area: 2,067 mi² County seat: Harrison Towns: Harrison Check the Road Condition on the Nebraska Highway Cameras
