Illinois Trails Project: Peoria County
- Searchable birth, cemetery, court, death, obituaries, marriage, and related historical and genealogical records.
- http://genealogytrails.com/ill/peoria/

Peoria County Extension Unit
- University of Illinois extension that provides practical, research-based information and programs.
- http://www.urbanext.uiuc.edu/peoria/

Peoria County Bar Association
- PCBA was founded in 1879 and now numbers nearly six hundred members. It is the largest regional bar association in downstate Illinois.
- http://www.peoriabar.org/

Peoria County Government
- Showcases news and information on county programs, officials, events, services, and records.
- http://www.co.peoria.il.us/