Profile for Penobscot County
- Provides information about members of Congress, State Legislators, cities, towns, law enforcement, schools, media, courts, census bureau, economic, and population estimates. County seat located in Bangor.
- http://www.capitolimpact.com/gw/cntydetail.asp?state=me&stfips=23&stname=Maine&fips=23019

Penobscot County
- Elected county officials, codes and ordinances, policies and other data provided by the National Association of Counties.
- http://www.naco.org/Template.cfm?Section=Find_a_County&Template=/cffiles/counties/county.cfm&id=23019

Penobscot County Soil and Water Conservation District
- Assists landowners in Penobscot County through education and technical assistance to improve natural resources.
- http://www.penobscotswcd.org/

Penobscot County - USGenWeb Project
- Past and present county links and information. Provides genealogical resources and vital records.
- http://www.rootsweb.com/~mepenobs/mepenobs.htm