The registers hold details of individual Minis and Mini Coopers, which serves as a detailed source of technical and historical data.
These registers are administered by a Registrar, who keeps details of all the cars relevant to the register, deals with members enquiries and supplies regular updates to the MCR magazine.
Those registers that have a page detailing their particular model are highlighted.
| Register | Models Covered |
| Mk1 Cooper Register | Austin and Morris Cooper (Mk1) |
| Mk1 Cooper S Register | Austin and Morris Cooper S (Mk1) |
| Mk2 Cooper Register | Austin and Morris Cooper (Mk2) |
| Mk2 Cooper S Register | Austin and Morris Cooper S (Mk2) |
| Mk3 Cooper S Register | Mini Cooper S (Mk3) |
| Innocenti Mini Cooper Register | Innocenti Mini Cooper Mk1,2,3,1300,100 Export and Authi Mini Cooper |
| 1275 GT Register | 1275 GT models |
| RSP Cooper Register | RSP Cooper |
| Rover Cooper Register | Rover Mini Cooper |
| First Generation MINI Register | R50, R52 and R53 MINI models |
| Later Generation MINI Register | Later MINI models |
| Appendix K Register | For Appendix K race cars |
| Coachbuilt Cooper and S Register | Cars built by the likes of Radford and Wood & Pickett |
| Ex-Police Register | Mini Coopers used by police forces |
| Ex-Works and Competition Car Register | Ex Works Minis and Minis modified in the spirit of the Works. This includes Competition cars |
| Mini Super Register | Mini Supers |
| Non-Cooper Register | All other Non-Cooper Minis |
