Clan MacMillan: Glengarry and Ottawa Valley
- Local Canadian branch of the Clan MacMillian Society of North America. Focus is on individual family pedigrees, Scottish heritage and associated research resources.
- http://www3.sympatico.ca/comflex/mcmillan/

Clan MacMillan, Pacific Branch
- Home site of the clan in Southern California. Provides clan history, celtic local events schedule, membership details, sectional Scottish maps and t-shirts.
- http://www.macmillanclan.org/

MacMillan: North Central States, USA
- Clan MacMillan (NCS) encompasses Minnesota, Wisconsin, Iowa, Illinois and the Dakotas; aim is to generate awareness of shared Scottish heritage amongst local family members.
- http://www.mcmillen-design.com/clan/

Clan MacMillan
- Compiled by Clan MacMillan International Centre at Finlaystone, the chief's historic home in Scotland. Includes the pedigree of Chief George G MacMillan and associated variants such as Macmillan and McMillan.
- http://www.clanmacmillan.org/