The Political Graveyard: Butler County, Nebraska
- Provides general information about the county, and lists of politicians who were born there, lived there, or died there.
- http://politicalgraveyard.com/geo/NE/BL.html

Nebraska National Register Sites in Butler County
- Lists official National Register historic sites in Butler County, with descriptions and photographs.
- http://www.nebraskahistory.org/histpres/nebraska/butler.htm

Historic Bridges of Nebraska: Butler County
- Description, photo, and history of the Clear Creek Bridge or Platte River Bridge, near Bellwood, Nebraska.
- http://www.fhwa.dot.gov/nediv/bridges/butler.htm