- Andreas' History of the State of Nebraska: Otoe County
- Contributes details for the counties past including early history, the settlers, and how the area has progressed.
- Historic Bridges of Nebraska: Otoe County
- Listing of historic bridges found throughout the county. Includes locations, and brief histories of each.
- National Association of Counties: Otoe County, NE
- List of elected county officials, demographic information, census facts, and list of place names in the county.
- National Register of Historical Places: Otoe County, Nebraska
- Brief description of the historical places in the county. Information about the historic function, signifacance, architectural style, and builder.
- Otoe County
- Offers official information on county officials, services, offices, public meeting calendar, and links.
- Otoe County Genealogy Trails
- Provides genealogical and historical details including obituaries, biographies, early settlement, businesses, marriages, graves and news.
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