Founded in 1918, Jit Sin High School (Malay: Sekolah Menengah Jenis Kebangsaan Jit Sin; simplified Chinese: 日新国民型华文中学; traditional Chinese: 日新國民型華文中學) is a co-educational Chinese vernacular secondary school in Bukit Mertajam, Penang.

The school is known nationwide as a top elite school for its excellent academic results in public examinations such as Pentaksiran Tingkatan Tiga (PT3), Penilaian Menengah Rendah (PMR) which was abolished in 2014,[2] Sijil Pelajaran Malaysia (SPM)[3] and Sijil Tinggi Persekolahan Malaysia (STPM)[4] consistently every year.

As Jit Sin is a Chinese secondary school (SMJK), Chinese language (Bahasa Cina[permanent dead link‍]) is a compulsory subject to be taken during Sijil Pelajaran Malaysia (SPM) for all students with Chinese primary school background (SJKC).

Jit Sin High School (JSHS) used to share the same compound with Jit Sin Independent High School at Aston Road.

In 1992, Jit Sin High School moved to a purpose-built campus in Taman Sri Rambai.