Internal Security Act may refer to:
- Internal Security Act 1960, former Malaysian law
- Internal Security Act (Singapore)
- McCarran Internal Security Act, a United States federal law
- Suppression of Communism Act, 1950, a South African law, renamed the "Internal Security Act" in 1976
- Internal Security Act, 1982, a South African law
This disambiguation page lists articles associated with the title Internal Security Act.
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