Hertsdirect: History of Hertfordshire
- Hertfordshire County Council tells the story of the county from Mesolithic to modern.
- http://www.hertsdirect.org/libsleisure/heritage1/Hertshist/

Herts Heritage
- Hertfordshire Museums provide information and education on heritage in the county. Includes transport history, natural history, malting and brewing, new towns and garden cities, young people and film-making.
- http://www.hertsheritage.org/

Hertfordshire Archaeological Trust
- Educational charity providing professional services. Describes training, information, advice and practical facilities, services, clients, news and a gallery of past projects and finds.
- http://www.hertfordshire-archaeological-trust.co.uk/