Look up younger brother in Wiktionary, the free dictionary.
A younger brother is a male individual who has at least one older sibling.
Younger brother or variants may also refer to:
- Younger Brother, British music group
- Younger Brother, a term used by a native community of northern Colombia known as the Koguis
- Younger Brethren, a group within the British organisation Trinity House
- Younger Brother (film), a 1953 Spanish drama film