CASS COUNTY HISTORY AND LOOKUP

County History Books

A Brief History of Cass County by Mae R. Schoetzow, (1935) – 94 Pages
Source: Hathitrust
Book ID: CH.2024.09.16.1134.CD.HT

Portrait and Biographical Album of Otoe and Cass Counties, Nebraska by Geoffrey Chapman Publishers (1889) – 1260 Pages
Source: Internet Archive
Book ID: CH.2025.09.03.1912.AR

Cass County, Nebraska: A Genealogical Overview

Situated in eastern Nebraska along the west bank of the Missouri River, Cass County is one of the state’s original and most historic counties. Its story is deeply connected to the river, serving as a gateway for westward expansion, a key point for early railroad development, and a center of fertile agriculture. Its county seat, Plattsmouth, located at the strategic confluence of the Platte and Missouri Rivers, was an important steamboat landing and outfitting post for pioneers. For genealogists, Cass County offers a rich collection of records dating back to the very beginning of the Nebraska Territory.

I. County Formation and Evolution

As one of the eight original counties, Cass County’s formation marks the beginning of civil administration in the Nebraska Territory.

  • 1854: County Formed: Cass County was established on November 23, 1854, by an act of the first Territorial Legislature of Nebraska.
  • Parent County: It was created from unorganized territory at the time the Nebraska Territory was opened for settlement. Research for individuals in the area before 1854 would involve federal records, such as military, Indian agency, and missionary archives.
  • Subsequent Formations: The county’s original boundaries were altered in the early territorial period. A portion of its southern territory was used to help create Otoe County in 1855, and a section of its western territory was contributed to the formation of Lancaster County in 1859.
  • Name Origin: The county was named for General Lewis Cass, a prominent American politician, diplomat, and U.S. Senator from Michigan who served as Secretary of War and Secretary of State.
  • County Seat History: Plattsmouth was designated as the county seat upon the county’s formation in 1854 and has remained the seat of government ever since. The impressive Cass County Courthouse, a prominent example of the Richardsonian Romanesque style, was constructed in 1891 and is listed on the National Register of Historic Places.

II. Settlement and Early History

  • Early Inhabitants: The area was the historical homeland of the Otoe, Missouria, and Pawnee Native American tribes, who utilized the rich resources of the river valleys. The Lewis and Clark Expedition camped near the future site of Plattsmouth in July 1804.
  • Pioneer Settlement and Economy: Following the Kansas-Nebraska Act of 1854, settlers, primarily from Ohio, Iowa, New York, and Pennsylvania, quickly moved into the area. The early economy revolved around the Missouri River. Plattsmouth thrived on steamboat traffic, freighting, and supplying provisions to pioneers heading west on overland trails like the Nebraska City Cutoff. Agriculture, focused on corn, wheat, and livestock, quickly became the backbone of the county’s economy.
  • Key Historical Events:
    • The Railroad Era: The arrival of the Burlington & Missouri River Railroad (later the Chicago, Burlington and Quincy) in the late 1860s transformed the county. Plattsmouth became home to the railroad’s extensive locomotive repair shops, which were the region’s largest employer for nearly a century.
    • River Transportation: Before the railroads, the Missouri River was the primary highway for travel and commerce, defining the location of the county’s earliest towns and settlements.
    • Strategic Location: Its position at the mouth of the Platte River made it a natural hub for trade and transportation, influencing migration and settlement patterns throughout the region.

III. Genealogical Records and Resources

This section provides practical information for locating ancestral records, most of which are housed at the county courthouse in Plattsmouth.

  • County Courthouse: The Cass County Courthouse, located at 346 Main Street, Plattsmouth, NE 68048, is the central repository for most historical records.
    • Clerk of the County Court: This is the primary office for genealogical research. It holds marriage records (1855-present), probate records (wills, estate files, administrations), and guardianship papers.
    • Clerk of the District Court: Maintains records of major civil and criminal court cases, including divorce decrees and naturalization records.
    • Register of Deeds: Holds all land transaction records, including deeds, mortgages, and town plats, from the county’s founding.
  • Vital Records:
    • Birth and Death Records: Statewide civil registration in Nebraska began in late 1904. Official records from that date forward are held by the Nebraska Department of Health and Human Services. Very few, if any, official birth or death records exist at the county level before 1904.
    • Marriage Records: Marriage records from 1855 to the present are an excellent resource and are held by the Clerk of the County Court.
  • Libraries and Societies:
    • Cass County Historical Society Museum: Located in Plattsmouth, this is an essential resource, housing artifacts, photographs, family histories, and subject files related to the county’s past.
    • Plattsmouth Public Library: Has a local history and genealogy collection available for public research.
    • History Nebraska (The Nebraska State Historical Society): Located in Lincoln, this is the premier state-level archive. It holds extensive collections of Nebraska newspapers on microfilm, state government records, manuscripts, and a comprehensive genealogical library.
  • Bordering Jurisdictions:
    • Sarpy County (north)
    • Saunders County (northwest)
    • Lancaster County (west)
    • Otoe County (south)
    • Mills County, Iowa (east, across the Missouri River)
    • Fremont County, Iowa (southeast, across the Missouri River)

Please share any resources you have and will do lookups or links to resources you are aware of. Thanks