Sedition Act may refer to:
- Alien and Sedition Acts, including the Sedition Act of 1798, laws passed by the United States Congress
- Sedition Act 1661, an English statute that largely relates to treason
- Sedition Act of 1918, also passed by the United States Congress
- Sedition Act 1948, a law in Malaysia
- Sedition Act (Singapore), a law in Singapore