Alexander's or Alexanders may refer to:
- Alexanders, a flowering plant
- Alexander's, a former department store company
- Alexanders (Boise, Idaho), a men's clothing store
- "Alexander's Ragtime Band", a 1911 song by Irving Berlin
- Alexander's Ragtime Band (film), a 1938 film based around the song
- Brantford Alexanders, a hockey team