| Grennaskolan Boarding School | |
| Type: | Municipally owned |
| Head Label: | Head Master |
| R Head Label: | Headmaster |
| R Head: | Jessika Humphreys |
| Founder: | Stockholm University |
| Website: | http://www.grennaskolan.se/ |
Grennaskolan Boarding School was a Swedish boarding school located in Gränna, Jönköping County. Grennaskolan Boarding School was founded in 1963 by Stockholm University and has today approximately 200 students, half of whom are boarding school students and half of whom are international students.
The boarding school was one of the three elite boarding schools in Sweden, the others being Sigtunaskolan Humanistiska Läroverket and Lundsbergs Boarding School. Grennaskolan Boarding School AB was a wholly owned subsidiary of Rådhuset AB, which is fully owned by Jönköping Municipality.
The school offered the IB Middle Years Programme from grades 7-9. The high school offered both Swedish and English programs. Students of the Swedish program focused either on humanities or science and mathematics, while the English-speaking programme was the International Baccalaureate.
Overall, half of the students were boarding students.
The school was found in 1963 and the first students graduated from the school in 1965 after 2.5 years of study.
The school celebrated their 50th anniversary in 2013.
Grennaskolan was permanently closed in 2019.