The Political Graveyard: Johnson County, Nebraska
- Database provides brief biographies of politicians who lived or died in the county and political history.
- http://politicalgraveyard.com/geo/NE/JO.html

Johnson County - NEGenWeb
- Features a genealogy database, queries, and information about the area's historical society. Join the county's email list.
- http://www.rootsweb.com/~nejohnso/

Johnson County, Nebraska
- Official county government site, offering information about elected officials and services provided by county departments.
- http://www.co.johnson.ne.us/