The John Hampden Society
- A society devoted to Great Hampden's most famous citizen, with information on his impact on the locality and photographs of Hampden House.
- http://www.johnhampden.org/

The Rising Sun
- [Little Hampden] Country inn in the Chiltern Hills dating from 1750. History, menu, accommodation tariff, maps and photographs of premises and countryside provided.
- http://www.rising-sun.demon.co.uk/

Haywards Ltd
- [Little Hampden] Offers facilities management and corporate real estate services. Information on services, case studies and news.
- http://www.haywardsltd.co.uk/

Hampden Group
- Specialist reinsurance and Lloyds group of companies. Describes its group structure, activities and expertise. Also details wedding reception facilities at Hampden House.
- http://www.hampden.co.uk/

Experience World Ltd.
- Providers of gifts and driving, flying, extreme sports, or pampering experiences to public and corporate clients.
- http://www.experience-world.co.uk/

Validium Group Ltd.
- Describes its employee assistance programmes available to employers. Also provides news and resources sections.
- http://www.validium.com