Jason may refer to:
- Jason, a Grayson government clerk.
- Jason (treecat), a son of Nimitz and Samantha.
- Jason Ackenheil, an officer of the Royal Manticoran Navy.
- Jason Alvarez, another officer of the RMN.
- Jason Andrews, an officer of the Grayson Space Navy.
- Jason Arner, a Silisian pirate.
- Jason Giancola, a Havenite politician.
- Jason Harrington, a Manticoran author and a member of the Harrington Clan.
- Jason Haskins, another officer of the GSN.
- Jason Haupper, another officer of the RMN.
- Jason MacGruder, a Swallow resistance fighter.
- Jason Petit, an officer in the People's Navy in Exile.
- Jason Wright, another officer of the RMN.
- Jason, the colony ship that brought the first settlers to Manticore.
- GNS Jason Alvarez, the lead ship of the Jason Alvarez-class of Grayson heavy cruisers.
- Jason Bay, a bay on the planet Manticore.