Serampore Union Institution is a Bengali medium boys' school in India, accredited as "A-Grade Excellent Educational Institution" by West Bengali Council of Higher Secondary Education for its brilliant and enviable academic performance. The school was inaugurated by Ishwar Chandra Vidyasagar. The school is affiliated to the West Bengal Board of Secondary Education and the West Bengal Council of Higher Secondary Education. It was established in 1884. In 2009, the school celebrated its 125th anniversary.

Spread over an area of almost ten bighas[clarification needed] and close to the river, the Hooghly, in the heart of Serampore (erstwhile Fredricknagore), a Historical and famous city in West Bengal. Serampore Union Institution has been in the centre of many historical events of before and after India's independence, with her spirited children actively participating in the freedom movement and process of reformation, social as well as political, besides achieving brilliant academic excellence spanning a period of hundred and twenty five years since 1884.