The Institute of Company Secretaries of India (ICSI) is a premier national professional body constituted under an Act of Parliament, namely the Company Secretaries Act, 1980 to regulate and develop the profession of Company Secretaries. The ICSI functions under the administrative jurisdiction of Ministry of Corporate Affairs, Government of India.

The Institute of Company Secretaries of India awards the certificate of bestowing the designation of Company Secretary (CS) to a candidate qualifying for the membership of the Institute. Membership of The Institute of Company Secretaries of India (ICSI) has been recognized for appointment to various superior posts and services under the Central Government.

The affairs of the Institute of Company Secretaries of India (ICSI) are managed by a Council consisting of fifteen elected members and five nominees of the Central Government.

The Institute has on its rolls more than 66,000 members including over 10,000 members holding certificate of practice. The number of students is about 200,000.