ISI has a strong network of affiliated colleges located across Kolkata, West Bengal. With over 1 affiliated colleges, it offers a wide range of undergraduate, postgraduate, and professional courses in fields like Arts, Science, Commerce, Engineering, Law, Management etc. These colleges follow the academic framework, syllabus, and examination pattern set by ISI while maintaining their own unique campus culture, extracurricular activities, and facilities. Admissions to affiliated colleges are conducted through competitive exams ensuring transparency and merit-based selection. Students at these affiliated colleges benefit from the reputation and recognition of ISI, access to quality faculty, modern infrastructure, and strong placement opportunities.