- Audi
 - Official site for Audi, with pictures and specs for new models, a new and used vehicle and car accessory search, and financial services.  Audi Driver Magazine
- Contains details of road tests of the latest models, technical features, model histories, feature cars, price guides, motorsport reports, news, and classified adverts. Audi Ireland
- Audi-Forums.com
- Public discussion forum covering all Audi cars.
- AudiForums.com
- Discussion forum and club for Audi owners and enthusiasts.
- AudiWorld
- Audi enthusiast web site, with a comprehensive collection of information and news for all models, including forums, FAQs, registry, and more.
- Audizine
- Independent Audi webzine featuring recent news, forums, gallery of owners' rides, and technical information for Audi drivers.
- Fourtitude
- A place on the Web for Audi, Lamborghini, and Seat fans to gather and discuss the latest news on their cars.
- Jens' Audi Page
- About current and old Audi models, their history, development, and racing success.
- Nordic Audi
- Info, pictures, links, and news regarding Audi.
- Rennlist
- Forums, mailing lists, and discussion areas for Porsche, Audi, and BMW enthusiasts.
- Waterfest
- Annual car show and motorsport event dedicated to water-cooled VW and Audi cars. Takes place in Englishtown, NJ.
- Wikipedia: Audi
- User-generated article discusses the history of the Audi car.
- Yahoo! Autos: Audi
- Features information on current models and used car listings.
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