|Height:||7 ft 7 in (231.1cm)|
|Birth:||10 August 1970|
Zhytomyr Oblast, Ukrainian SSR, USSR
|Death:||24 August 2014|
Podolyantsi, Chudniv Raion, Zhytomyr Oblast, Ukraine
Leonid Stepanovych Stadnyk (Ukrainian: Леонід Степанович Стадник; 5 August 1970 – 24 August 2014) was a Ukrainian man who claimed to have stood at 2.57 m (8 ft 5 in) though the photographic evidence suggests he was no more than 7 ft 7 in (2.31m).
Stadnyk's excessive growth began after brain surgery at the age of 14, after which he developed a pituitary gland tumor that caused the gland to secrete large amounts of growth hormone. This resulted in what doctors describe as acromegalic gigantism. Twenty years after the surgery, the doctors discovered the tumor had mysteriously disappeared and he was currently healthy. He reportedly wore US size 25 shoes. Although he held the title for a month, Stadnyk, having no interest in being in any record book, refused to be measured, ending his GWR recognition. Others have questioned the legitimacy of his record, noting that Stadnyk had never been officially measured by Guinness World Records only by "Ukrainian Book of Records", where his height was listed as 2.53 metres (8 ft 3.6in).