| SMK Raja Muda Musa | |
| Motto: | SABAR, YAKIN, USAHA, TEKUN, JAYA |
| Motto Translation: | PATIENT, CONFIDENT, EFFORT, DILIGENT, SUCCESS |
| Address: | Jalan Bukit Badong, 45600 |
| City: | Bestari Jaya |
| State: | Selangor |
| Country: | Malaysia |
| Other Name: | SMKRMM |
| Former Name: | SMK Batang Berjuntai |
| Type: | Public coeducational secondary |
| Established: | 1965 |
| District: | Kuala Selangor |
| Grades: | Form 1 - Form 5 (Secondary 1 - Secondary 5) |
| Session: | Morning & Afternoon |
| Principal: | En Mohd. Shuieb bin Ismail |
| Gender Label: | to override the default label --> |
| Lower Age: | 13 and |
| Upper Age: | 18 --> |
| Students: | 1446 (June 2017) |
| Campus: | Rural |
| Medium Of Language: | Bahasa Malaysia, English, Mandarin, Tamil |
| Yearbook: | SEMESRA |
| Colors: | Red, Yellow and Green |
Sekolah Menengah Kebangsaan Raja Muda Musa (English: Raja Muda Musa National Secondary School) or SMKRMM, is a public secondary school located in Bestari Jaya, Kuala Selangor District, Selangor.http://www.sekolahmy.com/N_SELANGOR/BEA3077.html It was established in 1965.[1] It has almost 1450 students and 120 teachers by June 2017.[2]
The school welcomed its first Multi-purpose hall in early 2017, the hall can approximately accommodate up to 1000 peoples at the same time.[3] The hall is one of the largest hall among the schools in Kuala Selangor district.