Henry Allen is a retired police officer and the father of Barry Allen and Jay Allen. He is also the husband of Nora Allen and a supporter of The Flash.
- In the comics, Henry Allen was a doctor married to Nora Allen and father of Barry Allen. He was framed for his wife's murder by Professor Zoom and died in jail before Barry could prove his innocence.
- John Wesley Shipp who portrays Barry Allen also portrays Henry Allen in the 2014 adaptation of The Flash.