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This page contains information regarding Star Trek: Discovery, and thus may contain spoilers.
Multiple realities
(covers information from several alternate timelines)

For the actor, please see Michael Ensign.
"Chief, I was just coming to see you. Can you believe it? They made me an ensign."
"I hadn't realized things were going so bad."
"Scary, isn't it? If my classmates at the Academy could only see me now."

Ensign (abbreviated Ens.) was a commissioned rank, the equivalent of which was used by the service organizations of many civilizations, including Starfleet, the Orions, and the Bajoran Militia. The rank or term "ensign" itself was unfamiliar to the Kraylor. (VOY: "Nightingale")


As a traditional naval grade, ensign was the lowest junior officer rank, below lieutenant junior grade or lieutenant. (VOY: "Nightingale") In Starfleet, it was usually the first rank assigned to new officers upon graduation from Starfleet Academy. (VOY: "Caretaker", et al.)

Naomi Wildman believed that she would be able to rise up the ranks aboard USS Voyager, as it crossed the Delta Quadrant, charting her journey as, "I'll be bridge assistant for a while, then I'll be promoted to ensign. It'll be lieutenant after that, and by the time we reach the Alpha Quadrant, Captain Wildman." (VOY: "Infinite Regress")

When Lieutenant Commander Janice Rand noted Ensign Tuvok preparing a Vulcan tea especially for Captain Hikaru Sulu, she chided him, asking "Trying to make lieutenant in your first month? I wish I'd have thought of that when I was your age. Took me three years just to make ensign." Tuvok, however, assured her that he had no ulterior motives. (VOY: "Flashback")

According to Lieutenant Commander Data, for one to move up the ranks, and "one proved themselves more capable, typically after three years as an ensign, they would be considered for promotion into the lieutenant tier." (TNG: "Datalore")

In 3191, after Lieutenant Commander Gen Rhys tricked the lowest-ranking Breen officer on the bridge of Ruhn's dreadnaught into giving up their post, Ensign Adira Tal sympathetically commented that "everyone always picks on the ensign." (DIS: "Lagrange Point")

Duties and responsibilities[]

An ensign's primary duty was professional growth, both as a leader and as an occupational specialist. Ensigns were mentored by more senior officers as well as chief petty officers as part of their development as Starfleet leaders. (DS9: "The Ship", "Starship Down") On some of the larger starship classes, such as the Galaxy-class starships, it was not uncommon for veteran and seasoned enlisted personnel to have ensigns working for them as technicians, thus having the ensign "learning the ropes" of the more technical aspects of starship design, such as transporter components. (TNG: "Clues")

Following the graduation of Marta Batanides and Jean-Luc Picard from Starfleet Academy, and prior to their respective first assignments, Batanides suggested that "Maybe these bars are just starting to feel a little heavy, ensign," after noting Picard's "hidden streak of responsibility," which Picard otherwise shrugged off as being part of "just getting older". (TNG: "Tapestry")

When Benjamin Sisko was an ensign, he met Curzon Dax, who, as he later explained, "took a raw young ensign under his wing and taught me to appreciate life in ways I'd never thought about before. He taught me about art and science and diplomacy. Whatever sense of honor I might have today, he nurtured." (DS9: "Dax")

According to Lieutenant Jadzia Dax, Commander Benjamin Sisko "wouldn't allow any ensign take a runabout into the Gamma Quadrant the day after she arrives." (DS9: "Melora")

Following the promotion of Ezri Dax to lieutenant junior grade in 2375, Julian Bashir told her, "I'm glad they made you a lieutenant. It would have been hard taking advice from an ensign." (DS9: "Afterimage")

Though junior officers, ensigns were permitted to fulfill the position of bridge officer or acting captain, and even be a member of the senior staff. (ENT: "Cold Front", "The Xindi"; TNG: "Where No One Has Gone Before", "Hide And Q"; VOY: "Caretaker", "Warhead", "Author, Author")

Experience and protocol[]

"An ensign ought to salute before addressing a captain."
– Paul Mayweather addressing his brother Travis Mayweather upon entering the bridge of the ECS Horizon, 2153 ("Horizon")

During a scenario devised for the M-5 drills in 2268, Captain James T. Kirk chose the ship's chief geologist Rawlins for a member of his landing party. When the M-5 computer made a difference choice, geologist Carstairs instead, Kirk did not see it the same way, explaining that Carstairs was "an ensign, no experience. This is his first tour of duty" aboard the USS Enterprise. M-5, however, disagreed because it knew that "Geologist Carstairs served on Merchant Marine freighters in this area. Once visited planet on geology survey for mining company." (TOS: "The Ultimate Computer")

When Ensign William T. Riker served aboard the USS Pegasus in 2358, seven months after his graduation from the Academy, he noted his inexperience was what allowed him to blindly follow the commands of Captain Erik Pressman during a mutiny. Recalling twelve years later, "I wasn't a hero and neither were you. What you did was wrong and I was wrong to support you, but I was just too young and too stupid to realize it. You were the captain. I was the ensign. I was just following orders." (TNG: "The Pegasus")

Notable ensigns[]



The 22nd century Starfleet denoted ensigns with a single rank pin. During the 2250s and 2260s, Federation Starfleet uniforms showed no insignia for ensigns. (ENT: "Broken Bow"; TOS: "The Cage", "Court Martial")

By the 2270s, ensigns were granted the former insignia of lieutenant junior grade, the lieutenant jg rank itself having been discontinued. (Star Trek: The Motion Picture) By at least 2278, ensigns wore a single pin shaped like a stylized "v" letter. (Star Trek VI: The Undiscovered Country; VOY: "Flashback"; LD: "I, Excretus")

The late 23rd century pin insignia was used until at least the 2320s. (TNG: "Tapestry") By the end of the 24th century, Starfleet ensigns were once again indicated by one single rank pin. (TNG: "Encounter at Farpoint")

See also[]


Background information[]

This naval rank was equivalent to the rank of second lieutenant, which is found in the United States Army, Air Force, and Marine Corps.

Star Trek has often portrayed ensigns as background characters who stand watches at bridge stations, serve as nameless security guards, or who get killed or eaten by the alien creature of the week (see "redshirt"). The characters of Wesley Crusher and Pavel Chekov were the first ensigns to be seriously explored with their duties and responsibilities mainly confined to learning and professional growth as officers. The episode TNG: "Lower Decks" also dealt with ensigns and what their daily duties consisted of, while the series Star Trek: Lower Decks is portrayed entirely from the perspective of Starfleet ensigns.

Starfleet ensigns were rarely seen in command of others, exceptions being when Ensign Chekov lead a security detail in TOS: "And the Children Shall Lead" and when Wesley Crusher was assigned to lead a science team in TNG: "Pen Pals".

In one instance, blurring the rank structure aboard Enterprise NX-01, Major J. Hayes demanded that Ensign Sato contact the captain, stating, "I gave you a direct order, ensign." (ENT: "Hatchery")

Occasionally, older characters have been seen as ensigns, an example of which is Jana Haines, who appeared as an ensign but seems to be in her late 30s or early 40s, as well as ensigns Davies and Alans who held the rank of ensign while serving as science officers with obvious graduate level education. Several other medical and science ensigns from Star Trek: The Next Generation (and later series) have also appeared whose age and experience indicated that they were obviously not recent Starfleet Academy graduates. This gives rise to the possibility that Starfleet, much like the United States Navy, had commissioning programs for prior enlisted personnel or for civilian doctors and scientists who wished to join Starfleet.

In the alternate reality, Leonard McCoy came out of Starfleet Academy as a lieutenant commander. This is also a common practice by the current armed forces, i.e. to give this elevated rank to highly specialized professions (doctors, lawyers, etc.).

After his character's promotion on the show, Gene Roddenberry gave Wil Wheaton the second lieutenant bars he earned in the Army Air Corps (second lieutenant being equivalent to an ensign in the US Navy). Present at the ceremony was General Colin Powell, chairman of the Joint Chiefs of Staff, who later became Secretary of State. (Star Trek: The Next Generation Companion, 2nd ed., p. 128; Star Trek: The Next Generation 365, p. 159)


Mentioned in several non-canon novels and other publications is a junior rank known as "ensign junior grade". The character of Miles O'Brien was suggested to have held this rank, specifically in the novelization of Emissary. In the historic United States Navy, a rank known as "Passed Midshipman" existed in the early 20th century intended for recent Naval Academy graduates who had yet to qualify for a position at sea.

External link[]