Americanism may refer to:
- American nationalism
- Any characteristic feature of American English
- Americanism (ideology), an early 20th-century ideology frequently posited in opposition to communism or anarchism
- Pro-Americanism, love, support, or admiration of the United States by non-Americans
- Americanism (heresy), a group of related beliefs supporting individualism and the separation of church and state that are regarded as heretical by the Catholic Church
- "Americanism", a song by MxPx from their album Teenage Politics