The Complete dead list of the characters including Hashira, Demons, other slayers and more for Demon Slayer (Kimatsu no Yaiba) with the names in Japanese added.

Warning: This article includes the significant spoilers!!
Do not read the following if you don’t want to know the end yet.
Note: The list is as of one before the last episode. The last episode was in present day, so the characters are obviously all dead (except for 2 persons and a cat).
Demon Slayer Corps (鬼殺隊 きさつたい)

Ubuyashiki Family
Kagaya Ubuyashiki (産屋敷 耀哉 うぶやしき かがや) Dead
He suicided by blowing up his whole mansion when Muzan Kibutsuji came to kill him.
Amane Ubuyashiki (産屋敷 あまね) Dead
She was with her husband, Kagaya when he blew himself up.
Hinaki and Nichika Ubuyashiki (産屋敷 ひなき、にちか) Dead
They were with their father, Kagaya when he blew himself up.
Kiriya Ubuyashiki (産屋敷 輝利哉 うぶやしき きりや) Alive
He is still alive today. In the last episode, he was on the news as the longest living person in Japan. Muzan Kibutsuji was related to the Ubuyashiki family. When Muzan became a demon, the family was cursed from then. Therefore, men in the family couldn’t live longer. However, since Muzan was defeated, and it seems the family was released from the curse.
Kuina and Kanata Ubuyashiki (産屋敷 くいな, かなた) Alive
They are Kiyira’s younger sisters.
Hashira

Gyomei Himejima (悲鳴嶼 行冥 ひめじま ぎょうめい) Dead
The Stone Hashira (岩柱 いわばしら): He died in the final battle against Muzan Kibutsuji.
Kyojuro Rengoku (煉獄 杏寿郎 れんごく きょうじゅろう) Dead
The Flame Hashira (炎柱 えんばしら): He was killed by the Upper Moon 3 Demon, Akaza right after the battle of Mugen Train.
Tengen Uzui (宇随 天元 うずい てんげん) Alive
The Sound Hashira (音柱 おとばしら): He lost his left arm in the battle against the Upper Moon 6, Gyutaro in the Yukaku Yoshiwara. He retired from the Demon Slayer Corps after the battle.
→10 Flamboyant Quotes Of Tengen Uzui In Japanese 【Demon Slayer】
Shinobu Kocho (胡蝶 しのぶ) Dead
The Insect Hashira (蟲柱 むしばしら): She was absorbed into the Upper Demon 2, Doma in the battle of Mugen Castle.
→10 Impressive Quotes Of Shinobu Kocho In Japanese And English From Demon Slayer
Sanemi Shinazugawa (不死川 実弥 しなずがわ さねみ) Alive
The Wind Hashira (風柱 かぜばしら): He lost 2 fingers of his right hand in the Battle against the Upper Moon 1 Kokushibo in the Mugen Castle but survived.
Muichiro Tokito (時透 無一郎 ときとう むいちろう) Dead
The Mist Hashira (霞柱 かすみばしら): He was killed by the Upper Demon 1 Kokushibo in the battle of Mugen Castle.
Obanai Iguro (伊黒 小芭内 いぐろ おばない) Dead
The Snake Hashira (蛇柱 へびばしら): He died in the final battle against Muzan.
Giyu Tomioka (富岡 義勇 とみおか ぎゆう) Alive
The Water Hashira (水柱 みずはしら): He lost his left arm in the battle against the Upper Moon 3 Akaza in the Mugen Castle.
→9 Inspirational Quotes of Giyu Tomioka in Japanese and English from Demon Slayer
Mitsuri Kanroji (甘露寺 蜜璃 かんろじ みつり) Dead
The Love Hashira (恋柱 こいばしら): She died in the Final battle against Muzan Kibutsuji.
Relater articles:
Remaining Quotes Of Hashira In Japanese From Demon Slayer
23 Inspirational Quotes in Japanese From Demon Slayer
Other Slayers

Tanjiro Kamado (竈門 炭治郎 かまど たんじろう) Alive
He survived but lost the sight of his right eye and all feeling in his left arm in the final battle against Muzan Kibutsuji.
You can read his quotes here → 13 Best Quotes Of Tanjiro Kamado In Japanese From Demon Slayer
Nezuko Kamado (竈門 禰豆子 かまど ねずこ) Alive
She was demonized for long but was back to human by the medicine Tamayo made.
Zenitsu Agatsuma (我妻 善逸 あがつま ぜんいつ) Alive
Inosuke Hashibira (嘴平 伊之助 はしびら いのすけ) Alive
Genya Shinazugawa (不死川 玄弥 しなずがわ げんや) Dead
He was killed by the Upper Demon 1 Kokushibo in the battle of Mugen Castle.
Kanae Kocho (胡蝶 カナエ こちょう かなえ) Dead
She was the older sister of Shinobu Kocho and the former Insect Hashira. She was killed by Doma.
Kanawo Tsuyuri (栗花落 カナヲ つゆり かなを) Alive
A disciple of Shinobu. She almost lost her sight in the final battle but survived.
Aoi Kanzaki (神崎 アオイ かんざき あおい) Alive
Murata (村田 むらた) Alive
He became a demon slayer at the same time as Giyu Tomioka.
People in the Swordsmith Village

Tecchin Tecchikawahara (鉄地河原 鉄珍 てっちかわはら てっちん) ???
The headman of the village and swordsmith for Shinobu and Mitsuri. He was not in the group photo in the last episode. So we don’t know if he was alive.
Hotaru Haganezuka (鋼鐵塚 蛍 はがねづか ほたる) Alive
The swordsmith for Tanjiro.
Kozo Kanamori (鉄穴森 鋼蔵 かなもり こうぞう) Alive
The swordsmith for Muichiro.
Koteru (小鉄 こてつ) Alive
A boy who helped Tanjiro with training.
Kongoji, Tetsuo, Kanaike, Kotaro and Tetsuhiro (金剛寺 こんごうじ, 鉄尾 てつお, 鉄池 かないけ, 鋼太郎 こうたろう, 鉄広 てつひろ) Dead
They were caught by the Upper Moon 5, Gyokko and stuffed into a vase as his artwork “mortal agony of swordsmiths”.
Others

Sakonji Urokodaki (鱗滝 左近次 うろこだき さこんじ) Alive
The Master of Water Breathing and the former Water Hashira.
Jigoro Kuwajima (桑島 慈悟郎 くわじま じごろう) Dead
The Master of Thunder Breathing and the former Thunder Hashira. He killed himself by cutting his stomach because one of his disciples, Kaigaku had become a demon.
Tanjiro’s family Dead
His father was dead probably from disease. His mother, brothers and sister except for Nezuko were all killed by Muzan Kibutsuji
Suma, Makiwo, Maizuru (須磨, まきを, 舞鶴 すま, まきを, まいづる) Alive
The wives of Tengen Uzui
Senjuro Rengoku (煉獄 千寿郎 れんごく せんじゅろう) Alive
The younger brother of Kyojuro Rengoku
Shinjuro Rengoku (煉獄 槇寿郎 れんごく しんじゅろう) Alive
The father of Kyojuro Rengoku
Naho Takada, Kiyo Terauchi and Sumi Nakahara (高田 なほ, 寺内 きよ, 中原 すみ) Alive
Workers in the Cho Yashiki, the mansion of Shinobu Kocho
Sabito and Makomo (錆兎, 真菰 さびと, まこも) Dead
They were killed by Teoni at the Demon Slayer Corps’ Final Selection.
Satoko (里子 さとこ) Dead
She was killed by the swamp demon.
Demons

Muzan Kibutsuji (鬼舞辻 無惨 きぶつじ むざん) Dead
He was defeated by the Demon Slayer Corps in mortal battle.
You can read his quotes here →14 Cruel Quotes Of Muzan Kibutsuji In Japanese From Demon Slayer
Kokushibo (黒死牟 こくしぼう) Dead
The Upper Moon 1: He was defeated by Gyomei Himejima, Sanemi Shinazugawa, Muichiro Tokito and Genya Shinazugawa in the Mugen Castle.
Doma (童磨 どうま) Dead
The Upper Moon 2.: Shinobu Kocho poisoned him by sacrificing herself in the Mugen Castle. Then Kanawo Tsuyuri and Inosuke Hashibura cut his head off.
Akaza (猗窩座 あかざ) Dead
The Upper Moon 3: Tanjiro Kamado and Giyu Tomioka cut his head off in the Mugen Castle, but his head was about to be reproduced. However, He remembered the time he used to be a human and killed himself.
Hantengu (半天狗 はんてんぐ) Dead
The former Upper Moon 4: After the dead battle in the Swordsmith Village, Tanjiro cut his head off.
Gyokko (玉壺 ぎょっこ) Dead
The Upper Moon 5: He was defeated by Muichiro Tokito in the Swordsmith Village.
Gyutaro and Daki (妓夫太郎, 堕姫 ぎゅうたろう, だき) Dead
The former Upper Moon 6: You have to cut their head off at the same time to defeat them. Tengen Uzui and Tanjiro Kamado cut Gyutaro’s head off and Zenitsu and Inosuke did Daki’s in the Yukaku Yoshiwara.
Kaigaku (獪岳 かいがく) Dead
The Upper Moon 6: He used to be a disciple of Jigoro Kuwajima with Zenitsu Agatsuma. However, He chose to be a demon to be stronger. He was defeated by Zenitsu in the Mugen Castle.
Nakime (鳴女 なきめ) Dead
The Upper Moon 4: One of her Blood Demon Art was “search” so that Yushiro took over the control of her sight in the battle of Mugen Castle. Muzan Kibutsuji noticed it and blew her head up.
Rui (累 るい) and her family Dead
Rui was the Lower Moon 5 Demon. In the battle of Natagumo mountain, he and his father were defeated by Giyu Tomioka, his mother by Tanjiro Kamado, his brother by Zenitsu Agatsuma and his sister by Shinobu Kocho.
Enmu (魘夢 えんむ) Dead
The Lower Moon 1: He integrated with the Mugen Train, but Tanjiro and Inosuke found his neck and cut it off. You can read demons’ quotes here →28 Cruel but Sad Quotes of 12 Moon Demons in Japanese from Demon Slayer
Other Demons

Tamayo (珠世 たまよ) Dead
She sacrificed herself to poison Muzan. Her body was absorbed into Muzan.
Yushiro and Chachamaru (愈史郎 ゆしろう, 茶々丸 ちゃちゃまる) Alive
They are still alive today because they are demons and immortal. Chachamaru was Tamayo’s cat and she demonized him so that Yushiro would have a friend to get along with.
Teoni (手鬼 ておに) Dead
A demon trapped in the Fujikasane mountain by Demon Slayer Corps for their final selection. Tanjiro cut his head off.
Swamp Demon (沼の鬼 ぬま の おに) Dead
A demon who used to eat only young girls. Tanjiro was ordered to defeat him and cut his head off.
Susamaru and Yahaba (朱紗丸 すさまる, 矢琶羽 やはば) Dead
Mizan sent them to find and kill Tanjiro in Asakusa. Yahaba was defeated by Tanjiro. Susamaru was forced to speak Muzan’s name (It was forbitten) by Tamayo’s Blood Demon Art. As the result, she was killed by Muzan.
Kyogai (響凱 きょうがい) Dead
He used to be one of the 12 Moon Demons, but his title was taken away since he couldn’t eat many humans. He was defeated by Tanjiro in his house.