Naturalization Act may refer to:
Great Britain
- Naturalization Act 1714
- Jewish Naturalisation Act 1753
- Naturalization Act 1870
United States
- Naturalization Act of 1790
- Naturalization Act of 1795
- Naturalization Act of 1798, part of the Alien and Sedition Acts
- Naturalization Acts of 1804 and 1855, concerning birthright citizenship in the United States
- Naturalization Act of 1870
- Naturalization Act of 1906
See also
- Naturalization Law of 1802