Katahdin Federal Credit Union
- Street : 1000 Central St
- City : Millinocket
- Phone : (207) 723-9718
- Website : https://katahdinfcu.org
Katahdin Forest Management, LLC
- Street : 4 Hill St.
- City : Millinocket
- Phone : (207) 723-2119
- Website : http://katahdinforestcabins.com/
Katahdin Gateway Insurance, LLC
- Street : 1000 Central St.
- City : Millinocket
- Phone : (207) 723-9941
Katahdin Higher Education Center
- Street : 1 Dirigo Dr.
- City : East Millinocket
- Phone : (207) 746-5741
- Website : http://www.emcc.edu/discover-emcc/emcc/other-centers/katahdin-region-higher-education-center/
Katahdin Kritters Pet Resort
- Street : 20 Dirigo Dr
- City : East Millinocket
- Phone : (207) 746-8040
- Website : http://katahdinkritters.com/
Katahdin Motors Inc.
- Street : 991 Central Street
- City : Millinocket
- Phone : (207) 723-5154
- Website : https://www.katahdinmotors.com
KFI (Katahdin Friends, Inc)
- Street : 1024 Central St. Suite A
- City : Millinocket
- Phone : (207) 723-9466
- Website : https://kfimaine.org/
Knights of Columbus
- Street : 27 Highland Ave.
- City : Millinocket
- Phone : (207) 447-1177
- Website : https://www.facebook.com/pages/Knights-of-Columbus-Hall/161416107292680
