Having only watched some the first 5 seasons of TNG I was wondering if there is any reference to how long Klingons live? During the series I haven't heard any reference to how old Worf is.

  • It should be noted that, if the Klingons follow most stereotypical warrior cultures, it would be dishonorable to die of old age, so the natural lifespan of a Klingon would not be something commonly tested; the most common cause of death would be a dagger or bat'leth to the heart
    – KeithS
    May 31, 2013 at 0:41
  • If Worf was 28 in season five of TNG, what year did Star Trek VI take place because Worf (if I'm not mistaken) played the Klingon equivalent of a public defender for Kirk and McCoy in the trial.
    – user19289
    Oct 29, 2013 at 21:17
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    @J.R.Chanin Colonel Worf was intended to be TNG Worf's grandfather (father to Worf's father Mogh). See his background information on Memory Alpha for more information
    – Izkata
    Oct 29, 2013 at 22:53
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    until they find a good day to die
    – NKCampbell
    Sep 23, 2020 at 22:14

4 Answers 4


It seems that no average life span was given until DS9 2x19, Blood Oath. From the Memory Alpha page on Klingon Physiology:

Klingons tended to live for over 150 years, but even into advanced old age, they tended to still be strong enough for combat. (DS9: "Blood Oath")

However, their maturation also happens at different rates than humans. In DS9 6x03, Sons and Daughters, Worf's son returns, appearing older than he should:

Many fans felt that Alexander was far older in this episode than he should have been given his age as established in The Next Generation. Bradley Thompson countered this argument by pointing out that it has never been established how fast Klingon children grow.

Alexander was born in 2366 and that episode takes place in 2374, making him about 8 years old and already a member of the Klingon Defence Force.

As for Worf in particular, he was born in 2340, making him about 24 years old during TNG Season 1 (2364), and about 28 years old as of TNG Season 5 (2368).


No quotes for Klingon lifespan were ever directly mentioned in the show. Most of the time we are left to infer how old Klingons could be.

Quoted directly from Memory Alpha:

Klingons were capable of living well over a century in age. Individuals such as Kang, Koloth, Kor and Arne Darvin lived well over one hundred years. (DS9: "Blood Oath", "Trials and Tribble-ations", "Once More Unto the Breach")

No exact lifespan has been given for Klingons, just approximates. In 2370, Odo observed that Kor "must be a hundred years old" and his "best friend," Koloth, was "probably a hundred and fifty years old." This observation was made over 100 years after their encounter with James Kirk.

  • Klingons have physiological advantages over Humans in terms of physical strength, stamina and resilience. Even though Humans and Klingons share a genetic progenitor in the distant past, the Klingon homeworld was more challenging giving the physical advantage to Klingons.

  • A longer lifespan would be an evolutionary asset and likely an aspect of the evolutionary forces which acted on their their genome from the challenges in the Klingon environment.

  • In addition to any normal environmental advantages, it is also possible the Klingons may have modified their genome during their period of experimentation with genetic engineering which ended during the Augment Wars. Though the Augment virus was reversed, it was not mentioned if other earlier modifications were affected.

  • It's a common trope of both sci-fi and fantasy, that other races are stronger, longer-lived, more knowledgeable etc than humans but somehow the plot revolves around humans anyway, and these other races ultimately defer to them
    – Gaius
    Oct 28, 2018 at 10:45

The Klingon aging process is probably similar to Neanderthals. From paleontological evidence, it has been shown that a three year old Neanderthal child was as large, and as advanced physically, as a six year old Homo Sapien. It was not that they grew bigger as a species, but that they just reached adulthood much quicker.

Klingons likely mature in the same fashion. Given that they are a warrior race with a combative nature, it makes sense that they would need to reach adulthood relatively quickly.

  • 1
    I fail to see how this answers the question asked in any meaningful way
    – Valorum
    Dec 29, 2017 at 20:09
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    The use of the word "probably" is a bit problematic for our purposes of citing sources to back up claims. It's not a bad theory, but it's just that. A theory. Taking the Tour is a good way to learn more about how this site works and it will give you a badge. I hope you take the Tour and stick around. Don't be discouraged. Oct 28, 2018 at 3:34

Today, I happened to watch Star Trek 7 - Generations. In this film, Worf is part of the Enterprise D crew 78 years after the death of Captain Kirk on the Enterprise B.

I then happened to watch Star Trek 6 - The Undiscovered Country. In this film, Worf is the defense council for the trial of Kirk and McCoy, and he is roughly the same age in both films. This would suggest Klingons have a significantly longer life span then humans.

  • 6
    According to the comments on the question, citing Memory Alpha, the Worf in Star Trek VI isn't the same Worf from TNG and Generations. They're grandfather and grandson.
    – F1Krazy
    Sep 23, 2020 at 21:31

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