{{Teadlane}}'''Lambert Adolphe Jacques Quetelet''' ({{IPA-fr|kətlɛ|lang}}; 22. veebruar 1796 – 17. veebruar 1874) oli Belgia astronoom, [[matemaatik]], statistik, [[Sotsioloogia|sotsioloog]], polühistor, [[Londoni Kuninglik Selts|Londoni Kuningliku Ühingu]] liiige. Ta asutas ja juhtis Brüsseli Observatooriumi ja oli mõjukas kehtestataksemõjutas statistiliste meetodite kasutusele võttu [[sotsiaalteadused|sotsiaalteadustes]]. Tema nimi on mõnikord kirjutatud aktsendiga nagu ''Quételet''.<ref>[//en.wikipedia.org/wiki/Edward_Burnett_Tylor Tylor, Edward Burnett] (May 1872) "[[Fail:Wikisource-logo.svg|alt=Wikisource link to|13x13px]] [[wikisource:Popular Science Monthly/Volume 1/May 1872/Quetelet on the Science of Man|Quetelet on the Science of Man]]" ''[//en.wikipedia.org/wiki/Popular_Science_Monthly Popular Science Monthly]'' '''Volume 1''' [//en.wikipedia.org/wiki/Wikisource Wikisource] [//en.wikipedia.org/wiki/International_Standard_Serial_Number ISSN] [//www.worldcat.org/issn/0161-7370 0161-7370]{{wsPSM|Quetelet on the Science of Man|1|May 1872|first=Edward Burnett|last=Tylor|authorlink=Edward Burnett Tylor|scan=Page:Popular Science Monthly Volume 1.djvu/55}}[[wikisource:Page:Popular Science Monthly Volume 1.djvu/55|[scan]]]</ref><ref name="mactutor">{{MacTutor Biography|id=Quetelet}}</ref> Ta arendas [[Kehamassiindeks|kehamassi indeks]] skaalal.
He founded and directed the Brussels Observatory and was influential in introducing statistical methods to the social sciences. His name is sometimes spelled with an accent as ''Quételet''. He developed the body mass index scale.
