Members of the participating societies are automatically Associate Members of CLASP.
- Barby Hill Archaeological Project
- Blisworth Heritage Society
- Brington History Society
- Bugbrooke History Group
- Daventry Local History Group
- Flore Heritage Society
- FOAM – Friends of Alderton Monuments
- Friends of Daventry Museum
- Harpole Heritage Group
- History of Tiffield Society
- Northamptonshire Artefacts Recovery Club (NARC)
- Norton Northampton Portable Antiquities Search Team (NNPAST)
- Towcester and District Local History Society
- Weedon Bec History Society
- Whitehall Farm Roman Villa and Landscape Project
