Plat maps are available for research or purchase in several locations.
Official Sources for Lancaster County
For current sectional maps online: InterLinc [maps providedby Lancaster County Engineers] https://www.lincoln.ne.gov/city/plan/plat/tship.htm
For subdivision township maps: Lancaster County Register of Deeds (402) 441-7463 -- 555 South 10th St.
For overview and quarter section maps: Lincoln City Planning Dept. (402) 441-7491 555 South 10th St.
Offical Sources for Other Counties:
Contact the county seat, usually Register of Deeds or Assessor's Office:
Other Public Sources of Plat Maps:
University Libraries: For numerous current and historical plat maps and books, search the catalog using a keyword search: plat and Nebraska and [county name]
Lincoln City Libraries: For 19 items, most non-Lincoln maps are pre 1940, search the catalog using a title-keyword search.
Nebraska State Historical Society Library: To search county atlas/plat book holdings go to
https://history.nebraska.gov/collections/nebraska-county-atlases-and-plat-books
Comercial Sources for Map Purchase:
Western Cartographers (South Sioux City) 2408Dakota Avenue
South Sioux City, NE 68776-3038 (402) 494-8300
Farm and Home Publishers https://www.farmandhomepublishers.com/