| Rajavinit Mathayom School | |
| Native Name: | โรงเรียนราชวินิต มัธยม |
| City: | Dusit, Bangkok |
| Country: | Thailand |
| Authority: | Office of the Basic Education Commission |
| Founder: | King Bhumibol Adulyadej |
| Type: | Public, Co-education, Day school |
| Grades: | 7–12 |
| Campus Type: | Urban |
| Motto: | Good Education, Be Disciplined, Pursuing Activities |
| Nickname: | RNM |
| School Colours: | White and Blue-black |
| Established: | April 4, 1978 |
| Enrolment: | 2,373 |
| Enrollment As Of: | 2012 |
| Website: | http://www.rnm.ac.th |
Rajavinit Mathayom School (RNM) (th|โรงเรียนราชวินิต มัธยม, is a state school located in Bangkok, Thailand.
The school was built on land given by King Bhuipol, about 2.5acres at the corner of Rama V Road and Pitsanuloke Road. The land used to be the location of the Royal Stables of King Vajiravudh. The school serves students who finish their primary education at Rajavinit School and the children of those who work in the Royal Household Bureau.
The school's name means "a place for training children of secondary level to be good citizens of His Majesty".
On April 4, 1978 the Ministry of Education announced the establishment of the school.
The Five Sporting Houses are: