Adams Formed: 1867 Parent: Clay	Antelope Formed: 1871 Parent: Pierce	Arthur Formed: 1887- Unorganized Territory	Banner Formed: 1888 Parent: Cheyenne	Blaine Formed: 1885 Parent: Custer
Boone Formed: 1871 Parent: Platte	Box Butte Formed: 1887 Parent: Unorganized Territory	Boyd Formed: 1891 Parent: Holt	Brown Formed: 1883 Parent: Unorganized Territory	Buffalo Formed: 1855 Parent: Original County
Burt Formed: 1854 Parent: Original County	Butler Formed: 1856 Parent: Unorganized Territory	Cass Formed: 1854 Parent: Original County	Cedar Formed: 1857 Parent: Original County	Chase Formed: 1873 Parent: Unorganized Territory
Cherry Formed: 1883 Parent: Unorganized Territory	Cheyenne Formed: 1871 Parent: Lincoln	Clay Formed: 1871 Parent: new Clay County Old Clay county formed in 1855 later became part of Gage and Lancaster	Colfax Formed: 1869 Parent: Dodge	Cuming Formed: 1855 Parent: Burt
Custer Formed: 1877 Parent: Unorganized Territory	Dakota Formed: 1855 Parent: Original County	Dawes Formed: 1855 Parent: Sioux	Dawson Formed: 1860 Parent: Buffalo	Deuel Formed: 1888 Parent: Cheyenne
Dixon Formed: 1856 Parent: Original County	Dodge Formed: 1854 Parent: Original County	Douglas Formed: 1854 Parent: Original County	Dundy Formed: 1873 Parent: Unorganized Territory	Franklin Formed: 1867 Parent: Kearney (org 1871)
Fillmore Formed: 1856 Parent: Unorganized Territory	Frontier Formed: 1872 Parent: Unorganized Territory	Furnas Formed: 1873 Parent: Unorganized Territory	Gage Formed: 1855 Parent: Original County	Garden Formed: 1909 Parent: Deuel
Garfield Formed: 1884 Parent: Wheeler	Gosper Formed: 1873 Parent: Unorganized Territory	Grant Formed: 1887 Parent: Unorganized Territory	Greeley Formed: 1871 Parent: Boone	Hall Formed: 1858 Parent: Original County
Hamilton Formed: 1867 Parent: York	Harlan Formed: 1871 Parent: Unorganized Territory	Hayes Formed: 1877 Parent: Unorganized Territory	Hitchcock Formed: 1873 Parent: Unorganized Territory	Holt Formed: 1860 Parent: (once named West) Knox
Hooker Formed: 1889 Parent: Unorganized Territory	Howard Formed: 1871 Parent: Hall	Jefferson Formed: 1856 Parent: Gage	Johnson Formed: 1855 Parent: Original County	Kearney Formed: 1860 Parent: Original County
Keith Formed: 1873 Parent: Unorganized Territory, Lincoln	Keya Paha Formed: 1884 Parent: Holt, then Brown & Rock	Kimball Formed: 1888 Parent: Cheyenne	Knox Formed: 1873 Parent: L'Eau Qui Court, Emmet (orig. names)	Lancaster Formed: 1856 Parent: Original County
Lincoln Formed: 1860 Parent: Unorganized Territory (once named Shorter)	Logan Formed: 1885 Parent: Custer	Loup Formed: 1855 Parent: Unorganized Territory Renamed Loup in 1883	Madison Formed: 1856 Parent: Platte	McPherson Formed: 1887 Parent: Lincoln, Keith
Merrick Formed: 1858 Parent: Original County	Morrill Formed: 1908 Parent: Cheyenne	Nance Formed: 1879 Parent: Merrick	Nemaha Formed: 1854 Parent: Original County	Nuckolls Formed: 1860 Parent: Clay
Otoe Formed: 1854 Parent: Original County	Pawnee Formed: 1855 Parent: Original County	Perkins Formed: 1887 Parent: Keith	Phelps Formed: 1873 Parent: Unorganized Territory	Pierce Formed: 1856 Parent: Madison
Platte Formed: 1856 Parent: Original County	Polk Formed: 1856 Parent: Original County Part of York County in Territorial Days	Red Willow Formed: 1873 Parent: Frontier	Richardson Formed: 1854 Parent: Original County	Rock Formed: 1857 Parent: Brown
Saline Formed: 1855 Parent: Gage, Lancaster	Sarpy Formed: 1857 Parent: Original County	Saunders Formed: 1856 Parent: (formerly Calhoun) Sarpy, Douglas	Scotts Bluff Formed: 1881 Parent: Cheyenne	Seward Formed: 1855 Parent: (once named Greene) Lancaster
Sheridan Formed: 1885 Parent: Sioux	Sherman Formed: 1871 Parent: Buffalo	Sioux Formed: 1877 Parent: Unorganized Territory	Stanton Formed: 1855 Parent: (formerly Izard) Dodge	Thayer Formed: 1871 Parent: Jefferson
Thomas Formed: 1887 Parent: Blaine	Thurston Formed: 1865 Parent: (Blackbird Co. Parent: Indian Reservation) Burt	Valley Formed: 1871 Parent: Unorganized Territory	Washington Formed: 1854 Parent: Original County	Wayne Formed: 1871 Parent: Thurston