Disney's Dinosaur features Baylene, the last of the brachiosaurs glimpsed in the movie's prologue. There's a reason for it: the movie is set on the Cretaceous, when the species was already extinct. Meanwhile, Aladar and his family of Plio, Yar, Suri, and Zini are the last survivors of Lemur Island, and the mammals believe themselves the last lemurs until the epilogue when Zini discovers a clan in the Nesting Grounds.
It is heavily implied throughout How to Train Your Dragon and the sequel that Toothless, the dragon in question, is the last remaining Night Fury in existence. The third film confirms this, with its main antagonist revealed to have been responsible for the deaths of all Night Furies (except for Toothless). In the epilogue, Toothless and the Light Fury have mated and produced three Night/Light hybrids, partially reviving the breed.
Manny the mammoth from the Ice Age series. It's merely implied in the film, where he's the only mammoth seen, but in the second film he worries greatly about being the last one. Until he meets Ellie, another mammoth who thinks she's a possum. He attempts to get her to realize her true species. At the end of the film, they discover there are more mammoths besides themselves, so neither are the last of their kind. They get a baby in the third movie, thus hinting at the chance that they may restart their species.
The Incredibles. It is implied that Mr. Incredible, Elastigirl and Frozone are the last supers of their generation (strongly implying the rest were picked off, one-by-one by Syndrome). The sequel reveals a new generation of supers waiting in the wings.
Koati: Nachi is the only Koati, and it's acknowledged that he doesn't know any other Koati. Later, sees a painting in an ancient ruin that suggests to him that he has a family of other Koati somewhere.
Kung Fu Panda plays this with Po, the only apparent panda in a village of rabbits, geese, and pigs. The second film shows that his kind was killed off by Lord Shen and his wolf army. Subverted in the Sequel Hook. Not only is Po's real dad alive, Kung Fu Panda 3 reveals that there's a village of about thirty to forty pandas with the children outnumbering the adults.
This is the focus of the Animated Short Film The Lonely Dodo which tells the story of the lonely Dodo Bird and his search to find a friend.
Imagine being the last of your kind...
At the end of the original animated film The Lorax, the Once-ler gives the very last truffula seed to the young person he's been telling his story to, along with the duty to grow a new forest and subvert this trope.
In Megamind, both the titular villain and his nemesis Metro Man are a case of this. Hilariously enough, they met on the way to Earth as babies, and as Megamind put it, "our glorious rivalry began".
In Missing Link, this applies to the Sasquatch Susan aka Mr. Link who reveals to Sir Lionel that he is the last of his kind, his loneliness is the motivation for asking for Sir Lionel's help to find his cousins the Yetis.
Attempts to avoid this trope formed the plot of Pixar's now-cancelled film Newt, which was cancelled for its similarity to Rio.
Sisu from Raya and the Last Dragon is the last living dragon in the world after the others were turned to stone five-hundred years ago. Raya and Tong are also the last living members of their respective tribes by the present day for the same reason. Fortunately, they're able to reverse the petrification and bring everyone back in the end.
In Rio, Blu and Jewel are the last Spix's Macaws. They manage to have three children at the end of the movie. The sequel averts this when more are found in the jungle, including Jewel's father.
A Discussed Trope at the end of Superman: Man of Tomorrow. Superman, J'onn and Lobo are ostensibly the last of their race, but Lobo says this trope is a con that bounty hunters like himself use to charge more money for catching them. He's personally seen more Martians in the universe and would bet that there are more Kryptonians as well. Lobo does insist that he's the last Czarnian however, having killed all the others.
The main character of WALLE is the last functioning member of his production line on Earth.
In the 2017 Woody Woodpecker movie, Woody is identified as the last known Pileated Red-Crowned Woodpecker.
The docu-drama The Age of Stupid portrays Earth in the year 2055 after runaway climate change ravages the planet. The film is shown from the viewpoint of an unnamed Archivist — the last surviving human on Earth — who laments, "why didn't we save ourselves when we had the chance?", and plays back real documentary footage from 2008, when the film was made.
David, the eponymous werewolf in An American Werewolf in London is the last werewolf, which became an important plot point as every person killed by a werewolf since the dawn of time is unable to rest and stays as a spirit on Earth, thus his death will put an end to the curse. Of course, the sequel disregards this completely.
This is a plot point in the movie Dogma: Bethany is the last scion of Jesus Christ and is needed to help save all of creation. When she finds this out, she doesn'ttake it well.
Draco in Dragonheart is the last dragon. In a less literal example, his nemesis-turned-friend Sir Bowen is the last Knight of the Old Code.
In to the sequel, Bowen discovers an egg left behind (presumably from Draco and the Scarred One) and the title of the Last Dragon has passed onto Dracos son, Drake. The film briefly averts Drake being the last when introducing Griffin, an evil dragon that is implied to have been one of Draco's contemporaries, and who is still living in the sequel on account of ensuing humanity.note (This is a retcon; possibly justified in that Griffin is a Chinese dragon [with a non-Chinese name]; it's entirely possible that a dragon living in the British Isles may not know about him.). However after killing Griffin, Drake does truly become the last dragon once again.
Vermithrax Pejorative in Dragon Slayer is said to be the last dragon in the world after her young offspring are killed.
In Ernest Goes to Camp, it's specifically mentioned that Chief Saint Cloud and his granddaughter are the last surviving members of their Native American tribe.
Fantastic Beasts: The Crimes of Grindelwald: Leta Lestrange is the last remaining member of the French branch of the Lestrange family. Since her brother Corvus really did die in infancy, with Leta's death her branch of the family becomes extinct. Similarly, Yusuf Kama says he's the last male from his family.
Hawk the Slayer. Gort, Crow and Baldin are said to be the last members of the giant, elf, and dwarf races, respectively. As you might imagine, the movie is not very original when it comes to character.
Smaug himself is the last of the great dragons in Middle-Earth.
Beorn, a shapeshifter ("Skinchanger") who was once one of a great race. He explains that many of his kind were slaughtered by orcs, and the rest were captured for sport. He's the only one to escape, and still wears a shackle on one hand, apparently in remembrance. He doesn't like dwarves, but chooses to help them anyway because he hates the orcs that are after them far more.
In The Hunter Professional mercenary Martin Davis is tasked with tracking and killing the Last Tasmanian Tiger by an organization called Red Leaf in order to retrieve biological samples. He eventually finds it but decides to shoot it in order to end its suffering. He then burns the body so Red Leaf can never get their hands on it.
In Jurassic World, this applies to the Indominus rex, after it is revealed that there were two until she ate her sibling, making her the last out of two Indominus that were created. She also counts as being a species Unto herself.
As of Jurassic World: Fallen Kingdom, Blue is explicitly stated to be the last surviving Velociraptor, since her siblings were killed in the events of the previous film and it's implied that all dinosaurs that lived on Isla Sorna including the raptors were brought to Isla Nublar or are gone as well, leaving her the Last of Her Kind. This applies to Rexy, the original T. rex as well. At over 30-years-old, she outlived all other members of her species and is the last confirmed surviving T. rex in the series.
In Peter Jackson's King Kong (2005), it is strongly implied that Kong is the last giant ape on Skull Island: the most telling evidence is a shot of him entering his cave and walking past multiple skeletons of giant gorillas. This loneliness, along with the hostility of Skull Island's environment, accounts for both his ferocity and his need for company, which Ann Darrow supplies.
Furthermore, as stated in the background materials, Skull Island's entire ecosystem is dying because the island is submerging due to geological activity. According to the companion book on Skull Island, the entire island sank not long after the crew's second visit to document the area.
The trailers for The Last Airbender movie has the narrator mention this trope by name: "He (Aang) is the Last Of His Kind, all that remains of a once powerful nation..."
The low-budget but still enjoyable movie The Last Man, basically. Well, almost.
Similarly to the Bleach example above, The Last Samurai had Katsumoto as the last leader of the samurai class, while Tom Cruise's character is an "adopted samurai" and the only survivor of Katsumoto's army's last stand. Also, many of the samurai (including Katsumoto) had sons and grandsons who were trained as swordsmen....
In Logan the Mutants are nearly extinct with no new mutants born in years, the surviving mutants we see in the movie are Logan, Professor Xavier and Caliban, it is very likely that they are the last mutants. After the death of both Xavier and Caliban, it is highly likely Logan is the last of his kind (the old generation of mutants), despite the discovery of Laura and the Young Mutants created by Transigen. His death at the end of the movie ensures that his generation is no more.
Thanos is the last Titan left in all the universe, as the rest of his species was killed off in resource wars brought about by an Overpopulation Crisis. He's determined to never let anyone else go through this again, even if his "mercy" is perceived as cruelty by others.
By the time Thor, Rocket and Groot reach his realm, Eitri is the last remaining dwarf after Thanos exterminated his entire people.
In Godzilla (2014), Godzilla is described as the last of a species that lived when the Earth's surface was still heavily radioactive, this is also the case for the two MUTOs (This is partially averted in Godzilla: King of the Monsters (2019) with this now applying to the lone MUTO that bows to Godzilla along with the other Titans at the end of the film).
In Kong: Skull Island Kong is the last of the giant apes that were the protectors of the Skull islands natural balance and native human population.
In Godzilla vs. Kong besides still applying to Godzilla and Kong it also applies to Jia, a girl who Kong saved and has a special bond with who is the last surviving member of Skull Islands Iwi tribe.
It also seems to be a general rule that unless stated otherwise, most of the larger Titans sleeping on the surface are the last of their respective species. We only see one Behemoth, one Scylla, one Methuselah, etc. Aside from the MUTOs, the only Titan species shown to have a breeding population all live on Skull Island or in the Hollow Earth.
In Noah, after the Ark has been built and the earth is flooded. Noah, his family and Tubal-Cain are all that is left of humanity which leaves them as the only 6 surviving humans on earth. Before Ila gives birth Noah believes the Creator intends for them to be the last humans... he changes his mind.
This also applies for the all the creatures that boarded the ark in pairs, they are the last of their respective species whilst on the ark (before they can reproduce in the post-flood world).
Outlander: The Moorwen is the last of her species. However it is revealed she had a baby but both the Moorwen and its offspring are slain.
The quote comes from Pirates of the Caribbean: At World's End where, while Jack isn't specifically the last of his kind, pirates are still a "dying breed" and by the third movie, thanks to the actions of Beckett, are bordering on extinction. Jack doesn't feel like fighting for survival, though, and thinks it might be cool to have the nickname "The Last Pirate". He changes his mind when they encounter the dead Kraken, which was the last of its kind, leading to the above quote.
Zac Hobson appears to be the last human in The Quiet Earth, after everyone else suddenly vanishes. Later, he finds two other people. However, at the end, he is certainly alone.
While not actually portrayed in a film, the production of Schindler's List has one of these moments. Steven Spielberg approached John Williams about composing the score, but Williams conceded that there were better composers for the job. Spielberg's reply? "Anyone who is better is dead."
Hits its zenith in The Force Awakens: Luke did try to reform the Jedi Order, but it all blew up in his face when his nephew Ben Solo fell to The Dark Side (along with a few other students) and slaughtered all the other apprentices training under him. In the thirty years that pass between Return of the Jedi and The Force Awakens, Luke has retreated to a corner of the galaxy in anguished solitude in order to ensure he is the last of the Jedi. After he passes away in The Last Jedi, the title is passed to his final apprentice, Rey.
By the end of The Last Jedi, Leia is the last remaining Original Trilogy lead protagonist after the deaths of Han Solo in The Force Awakens and Luke Skywalker in this film. Ironically, Carrie Fisher was the first of the OT leads to pass on, having died in December 2016, whereas Harrison Ford and Mark Hamill outlived her.
Terminator: Dark Fate features Carl, the final remaining individual in the T-800 line of Terminators, and as a result, the last Skynet-built Terminator ever - due to the events of Terminator 2: Judgment Day preventing Skynet from existing in the future. He's lasted so long because he was the one in his line that managed to finally successfully kill John Connor, but with no other purpose he moves on to live a normal life, where he evolved and grew to realize what he had done, growing a weary conscience as a result. To attempt to make up for this, he teams up with Sarah, Dani and Grace to defeat the newest Terminator model, known as the Rev-9. By the end of the film, the T-800s are extinct, as a result of Carl and Rev-9 dying together - the legacy of Skynet reaching a final close.
In the follow-up, Transformers: Dark of the Moon, it is revealed that Optimus isn't the last one; it was merely assumed he was. This revelation is made by the discovery of Sentinel Prime; Optimus' mentor and father figure, who was thought killed centuries ago, but in reality his ship, the Ark, was disabled and eventually crashed on our moon, whilst Sentinel slipped into stasis. He is reactivated for the events of the film, whereupon the more shocking revelation that he had allied himself with the Decepticons occurs, becoming the film's Big Bad via usurping command from Megatron. Optimus is left with little choice but to kill him at the end of the film, presumably leaving himself as the last Prime for certain.
In Transformers: The Last Knight, Viviane Wembly is revealed to be the last living descendant of Merlin (yes, that Merlin) and the only human left who can command the Staff of Merlin (Actually a Cybertronian artifact keyed to Merlin's DNA).
In the Tremors franchise, El Blanco is the last known Graboid alive, and Messerschmitt is the last known ass-blaster. Of course, others pop up in some episodes of the TV series, being promptly eliminated by Burt.
Quorra is the last ISO after the ISO Holocaust The Great Purge in TRON: Legacy. By the end of the film there are none left since she has escaped the digital world and become human
Wonder Woman (2017): The God of War, Ares, slaughtered the rest of the Greek Pantheon, leaving him and his half-sister Diana as the only living gods on Earth. After Diana kills Ares, she is all that remains.