The list includes only the characters whose age has already been revealed:
#20 – GERD
Gerd is a giant from Elbaf and the doctor of the New Giant Warrior Pirates. She was formerly an S-Class ranked mercenary for Buggy’s Delivery. She’s 75 years old.
#19 – BAKKIN & TSURU
Miss Bakkin is a former pirate and is the self-proclaimed lover of Edward Newgate and is the mother of Edward Weevil, one of the Shichibukai. She’s 76 years old.
“Great Staff Officer” Tsuru is a Marine Headquarters vice admiral. She’s 76 years old.
#18 – SILVERS RAYLEIGH – MONKEY D. GARP – CHINJAO
Silvers Rayleigh, also known as the “Dark King”, is the former first mate of the Roger Pirates, known as the “Right Hand of the Pirate King”. He’s 78 years old (his birthday is May 13th).
Monkey D. Garp is a Marine vice admiral. He is the father of Monkey D. Dragon, the paternal grandfather of Monkey D. Luffy and the adoptive grandfather of Portgas D. Ace. He’s 78 years old too (his birthday is May 2nd).
Chinjao is a former pirate, the leader of the Chinjao Family, and the retired 12th leader of the Happo Navy. He’s 78 years old.
#17 – SENGOKU
Sengoku the Buddha was the fleet admiral of the Marines pre-timeskip, succeeding Kong and preceding Akainu. He’s 79 years old.
#16 – MOTHER CARMEL
Mother Carmel was a child trafficker dealing in orphans who operated in the Underworld several decades ago. She took care of a young Charlotte Linlin, who would later go on to become the Yonko Big Mom. She was 80 years old.
#15 – HAJRUDIN
“Pirate Mercenary” Hajrudin is a giant warrior described as the “new generation” from Elbaf. He’s now the 6th division commander of the Straw Hat Grand Fleet. He’s 81 years old.
#14 – CLOVER
Professor Clover was the director of the Ohara Library, and a leading authority on archeology. He was a professor and scholar who studied poneglyphs with his fellow colleagues in the Tree of Knowledge. He was 85 years old.
#13 – BROOK
“Soul King” Brook is the ninth member of the Straw Hat crew, and the eighth to join Luffy’s crew, as well as being the oldest and the tallest member on board. He’s 90 years old.
#12 – STREUSEN
Streusen is the executive chef of the Big Mom Pirates, and is also the co-founder of the crew alongside Big Mom herself. He’s 92 years old.
#11 – HAREDAS
Haredas is an old man who lives in Weatheria. He was Nami’s tutor in weather-manipulation during the timeskip. He’s 97 years old.
#10 – SANJUAN WOLF
Sanjuan Wolf is one of the Ten Titanic Captains, and the captain of the Seventh Ship of the Blackbeard Pirates. He’s 99 years old.
#9 – JAGUAR D. SAUL
Jaguar D. Saul was a giant and a former Vice Admiral who first appeared as a castaway on the island of Ohara.
He was introduced in Nico Robin’s flashback during the Enies Lobby Arc, and by then he had already defected from the Marines. He was 105 years old.
#8 – KUREHA
Dr. Kureha is a highly skilled and very long-lived doctor on Drum Island. She is referred to as “witch” by some people. She’s 141 years old.
#7 – OIMO
One hundred years before the beginning of the main storyline, Oimo was a member of the Giant Warrior Pirates. He’s 153 years old.
#6 – KASHII
A century before the beginning of the series, Kashii was a member of the Giant Warrior Pirates.
Kashii, together with Oimo, was one of the two giants who guarded the front gate of Enies Lobby for over fifty years. He’s 156 years old.
#5 – OARS
Oars was an evil giant called the Continent-Puller. Legend has it that he amassed countries and islands under his control and his band of villains. He was 159 years old.
#4 – DORRY – BROGY – MORLEY
Dorry the Blue Ogre is one of the two former captains of the Giant Warrior Pirates from Elbaf. He’s 160 years old.
Brogy the Red Ogre is one of the two former captains of the Giant Warrior Pirates from Elbaf. He’s 160 years old.
Morley is an okama giant and the commander of the West Army in the Revolutionary Army. He’s 160 years old.
#3 – JORL
“Waterfall Beard” Jorl was a giant and former co-captain of the Giant Warrior Pirates, along with Jarl. He was 344 years old.
#2 – JARL
“Mountain Beard” Jarl is a giant and former co-captain of the Giant Warrior Pirates, alongside Jorl. He was 345 years old.
#1 – ZUNISHA
Zunisha is a Naitamie-Norida elephant that wanders the New World and carries the island of Zou on its back.
In the ancient past, Zunisha was sentenced to walk the seas for eternity and only act upon being ordered to do so for committing an unspecified crime. Since then, it has wandered the sea of the New World and lived for centuries carrying the Mink Tribe and the other lifeforms on Zou.
Zunisha is the oldest living creature introduced in the series, with its lifetime predating even the Void Century. Zunisha infact is over 1000 years old.