Steinheil is a surname. Notable people with the surname include:
Adolph Steinheil (1810–1839), German botanist
Heinrich Steinhowel (a.k.a. "Steinhöwel" "Steinhauel", "Steinheil"; 1412, Weil – 1482, Ulm), a Swabian author, humanist, and translator
Count Fabian (Gotthard von) Steinheil (Russian: Фаддей Фёдорович Штейнгель Faddej F. Štejngel'; 1762, in the Kreis Hapsal - 1831), a Estonia-born Baltic-German nobleman
Carl August von Steinheil (1801, Ribeauvillé, Alsace – 1870), Alsatian-German physicist
(Édouard Charles) Adolphe Steinheil (1850, Paris – 1908, Paris), a French painter
Marguerite "Meg" (Jeanne) Steinheil, Lady (ée) Abinger (1869, Beaucourt – 1954), French woman, married with Adolph
