Javelin may refer to:
- the Javelin, an old-fashioned training aircraft used by the Royal Manticoran Navy.
- the Javelin missile, a Solarian League Navy heavy cruiser/battlecruiser ship missile type.
- HMS Javelin, a Manticoran destroyer lost in the Battle of Monica.
- HMS Javelin, a Manticoran destroyer assigned to Destroyer Squadron 265, Home Fleet.
- PSN Javelin, a frigate of the Prism Space Navy.