O'Hara
- Cardinal O'Hara High School (Springfield, Pennsylvania)
- Justice O'Hara (disambiguation)
- Lake O'Hara
- Lambert McKenna
- O'Hara (band)
- O'Hara (surname)
- O'Hara Glacier
- O'Hara Township, Allegheny County, Pennsylvania
- O'Hara, U.S. Treasury
- O'Hare (disambiguation)
- Ohara (disambiguation)
- The People Against O'Hara
- William Hamilton Maxwell