Jonas could refer to:
- People:
- Jonas (Professor), a professor on a Federation archeological team in 2366
- Jonas (Doctor), a doctor aboard the USS Enterprise-D in 2368
- Jonas (Ensign), an ensign on Deep Space 9 in 2369
- Jonas Abidah, an alias used by Bael Nomine in the 2370s
- Jonas Elley, a political candidate in the 2270s
- Michael Jonas, a member of the Maquis in the early 2370s
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