Lieutenant, junior grade is a commissioned rank in Starfleet. They are commonly addressed as "Lieutenant."
- This makes it difficult to distinguish which lieutenants are of which grade.
Lieutenant junior grade insignia
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| era | general wear | command division | operations division | sciences division | ||||||||||||||||||||||||||||||||||||||||||
| command | tactical/military | flight-engineering (admin, pilot, engineer) |
security | special services | sci-ops (ops, sci & tac ops) |
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| Earth Starfleet ranks (Built to Lieutenant) |
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| Federation Starfleet ranks (2160s) (Built to Lieutenant) |
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| Federation Starfleet ranks (2230s) (Built to Lieutenant) |
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| Federation Starfleet ranks (2240s) (insignia for all officer grades) |
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| Federation Starfleet ranks (2250s) (insignia for all officer grades) |
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| Federation Starfleet ranks (2260s) |  |
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| Federation Starfleet ranks (2270s) (Built to Lieutenant) |
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| Federation Starfleet ranks (2270s-2350s) |  |
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| Federation Starfleet ranks (2350s-2366) |  |
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| Federation Starfleet ranks (2366-2373) | |
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| Federation Starfleet ranks (2373-2386) |  |
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| Federation Starfleet ranks (2386-2410) |  |
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| Federation Starfleet ranks (2800s) (Built to Lieutenant) |
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Alternate lieutenant junior grade insignia
| Starfleet alternate lieutenant junior grade insignia | ||||||||||||||||||||||||||||||||||||||||||||||
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| era | command division | operations division | sciences division | |||||||||||||||||||||||||||||||||||||||||||
| Federation Starfleet ranks (2250s) alt (Built to Lieutenant) |
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| Federation Starfleet ranks (2386-2410) alt |  |
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Positions and Lists
Command Division
- Chakotay, captain's aide
- Jack Crusher
- James T. Kirk
- Veronica Stadi, pilot
- Worf, son of Mogh
Operations Division
- Ronni Beth, engineer
- Joseph Carey, chief of impulse propulsion systems
- Domenica Corsi, deputy chief of security
- Kieran Duffy, engineer
- Geordi La Forge
- Nog, engineer, conn officer
- Rrairr, security officer
- T'Lirin, security officer
- Nyota Uhura, junior communications officer
- Singh, assistant chief engineer on the Enterprise-D
Chronology
Dates listed are first appearance or mention at that rank except as noted.
2256
- James T. Kirk promoted from Ensign
2257
- James T. Kirk promoted to Lieutenant
2316
2349
2353
2362
- Joseph Carey promoted from Ensign
2364
- Joseph Carey goes off active duty for treatment
- Geordi La Forge
- Worf promoted from Ensign, later promoted to Lieutenant
2365
2366
2367
- Joseph Carey returns to active duty
2369
- Joseph Carey promoted to Lietenant
- Veronica Stadi promoted from Ensign
2371
- Veronica Stadi promoted to Lieutenant
2373
2375
- Nog promoted from Ensign, later promoted to Lieutenant
2376
- Ronni Beth promoted from Ensign
2379
- Rrairr
- T'Lirin
Connections
- Lieutenant junior grade article at Memory Alpha, the wiki for canon Star Trek.
- Lieutenant Junior Grade article at Star Trek Expanded Universe, the fanon Star Trek wiki.
| Enlisted ranks | Commissioned ranks | Flag ranks | ||||||||||||||
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| Earth SF | CREW | PO2
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CPO
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ENS | LT | CMDR | CAPT
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CDORE | RADM / 2ADM | VADM / 3ADM | 4ADM | FADM / 5ADM
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| Starfleet & SFMC | ENS JG
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LT JG | LT | LT CMDR | CDR | CDORE
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| PVT | CPL | SGT
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SUBLT
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1ST LT | CAPT | MAJOR | LT COL | COL | BRIG | GEN | ||||||