Pelantikan OSIS 2018/2019 24 September 2018
Sep 23 – Oct 23, 2018
SMPN 21 Purworejo (Owner)
Febri projcek
Reyno umar dhani
Erlines Frisilaindri
aing maunggg
Choirul Alvin
Ramasari Ica76
Atila Boy
Achmad Ifandy