The Portland Foundation
- Impacting the county through grantmaking and providing leadership on key community issues. Includes its history, annual reports, events, a list of endowment funds and information about donations.
- http://www.portlandfoundation.org/

Jay County, Indiana Residential and Business Directory
- Scans of all the pages from this 1927 county.
- http://distantcousin.com/Directories/IN/JayCty/1927/

County Genealogy
- Part of the INGenWeb project. Merged searchable database, queries, other information for researchers.
- http://www.rootsweb.com/~injay/

The Political Graveyard
- Information on the political history, cemeteries and memorial sites in the county.
- http://politicalgraveyard.com/geo/IN/JY.html

The Jay County REMC
- Rural electric cooperative serving the area. Rates, rules, corporate information, online payment service.
- http://jayremc.com/