- Collin County, Texas Genealogy - Volunteers do lookups as a courtesy for individuals seeking information on their ancestors. Provides message boards and links to other resources.
- Collin County Republican Men's Club - Supporting the Republican Party and Republican candidates in Collin County, Texas
- Democratic Party of Collin County - Official site. Includes information on events and fundraisers.
- The Collin County Genealogical Society - Official site of the society, which is based in Plano, Texas.
- The Political Graveyard: Collin County, Tex. - Information about politicians who were born or died in Collin County.
- Princeton@ (2)
- Richardson@ (19)
- Sachse@ (4)
- Wylie@ (8)