The Department of Prisons (Sinhala: බන්ධනාගාර දෙපාර්තමේන්තුව Bandhanagara Departhamenthuwa) is a department of the Government of Sri Lanka responsible for the incarceration and rehabilitation of convicted criminal offenders and terror suspects, coming under the purview of the Ministry of Justice and National Integration.

The Commissioner-General of Prisons reports to the Subject Minister, who is in turn responsible to the Parliament of Sri Lanka.

In 1922 the penal colony of the Andaman Islands were closed down and 62 life convicts sent back to Ceylon.

The Department of Prisons is tasked with ensuring that custodial sentences (imprisonment) and non-custodial sentences and orders (home detention, supervision, community work and release on conditions) imposed by Sri Lankan Courts are administered in a safe, secure, humane and effective way.

The Department is also responsible for the transportation of prisoners within the country with the assistance of the Sri Lanka Police.