Tallest People in the World: Records and the Science
From Robert Wadlow’s verified 272 cm to today’s living record holders — the true stories behind extreme height, and what actually causes it.
Educational content, not medical advice. Gigantism and growth disorders are medical conditions — only a healthcare professional can diagnose or treat them. If you have concerns about abnormal growth, consult a doctor.
The tallest person ever reliably measured was Robert Wadlow, an American who reached 272 cm (8 ft 11 in) before his death in 1940. The tallest living man is Sultan Kösen of Turkey, at 251 cm (8 ft 2.8 in).
Extreme height fascinates us — but behind every record is a real person, and usually a medical story. Unlike ordinary tallness, which is mostly inherited, heights above roughly 230 cm almost always result from a hormonal condition called gigantism.
Below: the verified records, the living title holders, and an honest explanation of why extreme height happens — told with the respect these stories deserve.
Robert Wadlow: the tallest person ever
Robert Pershing Wadlow was born in Alton, Illinois, in 1918 — a normal-sized baby who simply never stopped growing. By age 8 he was already 188 cm, taller than his father. At 18 he measured 254 cm, and he kept growing until the day he died.
His final recorded height, taken 18 days before his death, was 272 cm (8 ft 11.1 in) — a Guinness World Records entry that has stood unchallenged for over 80 years. Wadlow was known as the "Gentle Giant": by all accounts kind, soft-spoken, and remarkably good-natured about the crowds that followed him.
But his height came at a terrible cost. His legs and feet required custom braces, and he had little feeling in them. In July 1940, a faulty brace rubbed a blister on his ankle that became infected. He died in his sleep on July 15, aged just 22. His coffin weighed nearly half a ton and required twelve pallbearers.
The tallest people alive today
No one living has come close to Wadlow — but the current record holders have remarkable stories of their own:
- • Sultan Kösen (Turkey, born 1982) — 251 cm (8 ft 2.8 in), the tallest living man. His growth was driven by a tumor on his pituitary gland; after gamma-knife surgery in 2010, his growth finally stopped. He could not finish school because of his size, but later found work and married in 2013.
- • Rumeysa Gelgi (Turkey, born 1997) — 215.16 cm (7 ft 0.7 in), the tallest living woman. Her height comes from Weaver syndrome, a rare genetic condition. She is an advocate for disability awareness and mostly uses a wheelchair.
| Person | Height | Status |
|---|---|---|
| Robert Wadlow (USA) | 272 cm (8′11″) | All-time record, verified |
| John Rogan (USA) | 267 cm (8′9″) | Verified |
| John Carroll (USA) | 263.5 cm (8′7.7″) | Verified |
| Sultan Kösen (Turkey) | 251 cm (8′2.8″) | Tallest living man |
| Rumeysa Gelgi (Turkey) | 215.2 cm (7′0.7″) | Tallest living woman |
Heights per Guinness World Records and documented medical measurements. Many historical claims above 272 cm were never independently verified.
Why extreme height happens: the science
Being very tall — say, 195 or 200 cm — is almost entirely genetic and perfectly healthy. Extreme height beyond about 230 cm is different: it nearly always signals gigantism, a rare hormonal disorder.
The usual cause is a benign tumor (adenoma) on the pituitary gland, the pea-sized gland at the base of the brain that controls growth hormone. When it overproduces the hormone during childhood — before the growth plates in the bones fuse — the whole skeleton keeps growing far past its genetic target.
If the same hormone excess begins after the growth plates have closed (in adulthood), height cannot increase anymore. Instead the hands, feet, and jaw enlarge — a related condition called acromegaly.
Modern medicine can treat gigantism: surgery to remove the tumor, medication to block growth hormone, or targeted radiation. Sultan Kösen’s growth was halted this way. A century ago, Robert Wadlow had no such option.
See how you measure up
Curious where you stand next to Wadlow — or next to an average person from any country? Our free comparison tool lets you line yourself up against anyone, side by side:
Frequently asked questions
Who is the tallest person alive?
Sultan Kösen of Turkey, at 251 cm (8 ft 2.8 in), recognized by Guinness World Records as the tallest living man. The tallest living woman is Rumeysa Gelgi, also of Turkey, at 215.16 cm.
How tall was Robert Wadlow?
272 cm (8 ft 11.1 in) — measured 18 days before his death in 1940. It remains the tallest reliably documented height in human history.
What causes extreme height?
Almost always gigantism: a benign pituitary tumor overproducing growth hormone during childhood, before the bone growth plates fuse. Ordinary tallness, by contrast, is overwhelmingly genetic and healthy.
Could someone grow taller than Robert Wadlow?
Theoretically possible, but no verified case has come close in 80+ years. Modern treatment usually halts pathological growth early, and Guinness requires rigorous independent measurement — which is why unverified historical claims don’t count.