Hertford Astronomy Group (HeAG), established from an evening class in 2009 who regularly meet at the Fairway Tavern, Penshanger Golf Complex (AL7 2ED )
Letchworth And District Astronomical Society (LDAS), established in 1985 and formerly known as the Stevenage & District Astronomical Society. The group meets monthly at Letchworth Free Church Hall, Letchworth. They have an observatory in Letchworth housing a 14-inch SCT catadioptric telescope
South West Hertfordshire Astronomical Society (SWHAS), founded in 1968 with the aims of promoting the science of astronomy and encouraging popular interest in the subject. The group meet monthly in the Cadogan House Hallat the Royal Masonic School, Rickmansworth.