Famous people named Arnold:
- Arnold Schwarzenegger - Austrian-born American actor and Governor of California
- Arnold Palmer - American golfer
- Benedict Arnold - American Revolutionary War general
- Edwin Arnold - English poet and journalist
- "Hap" Arnold - American pilot and Air Force commander
- Ruth Metzler-Arnold - Former member of the Swiss Federal Council
- Tom Arnold - American actor and comedian
- Vladimir Arnold - Russian mathematician
- Thomas Arnold - English school master
- Matthew Arnold - English poet, son of Thomas Arnold
- Mary Augusta Arnold - English author, grand-daughter of Thomas Arnold
- Arnold, California
- Arnold, Maryland
- Arnold, Minnesota
- Arnold, Missouri
- Arnold, Nebraska
- Arnold, Pennsylvania
- Hey Arnold - Nickelodeon-produced children's cartoon
- Arnold - character in the Scholastic book and cartoon series The Magic School Bus
- ARNOLD - the Academic Resource Network On-Line Database.