| Ranhill SAJ Sendirian Berhad | |
| Former Name: | SAJ Ranhill Sdn Bhd |
| Type: | Private Limited Company |
| Foundation: | 1994 |
| Location: | Jalan Garuda, Larkin, 80350 Johor Bahru, Johor, Malaysia |
| Key People: | Hamdan Mohamad, President |
| Parent: | Ranhill Utilities Berhad |
| Industry: | Water utility company |
Ranhill SAJ Sdn Bhd is a utility company responsible for water supply services in Johor. Ranhill SAJ is a subsidiary of the Ranhill Utilities Berhad.
Formerly known as Jabatan Bekalan Air Johor (JBAJ) a water supply department owned by the Johor state government. SAJ was established on 1994 under the Malaysian Companies Act 1965.