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Internal Security Department

About Internal Security Department

Explore the Internal Security Department's mission, role, and history in safeguarding Singapore's sovereignty and stability.

Last updated 25 September 2025
Aerial view of a circular road with a fountain in the middle, surrounded by tall buildings.
Stability does not come naturally to Singapore. We are peculiarly vulnerable. If our balance of security and stability is shattered, it is doubtful if we on our own can ever put Singapore together again.
— Former Prime Minister Lee Kuan Yew (1987)

Our mission

Explore the Internal Security Department's mission in safeguarding Singapore's sovereignty and stability.

Our history

Learn about Internal Security Department's history.