Carolina nacque a Biebrich, nel Principato di Nassau-Usingen come secondogenita e prima figlia femmina di Carlo Guglielmo, Principe di Nassau-Usingen (1735–1803), e di sua moglie, la Contessa Carolina Felicita di Leiningen-Dagsburg (1734–1810), figlia di Cristiano Carlo Reinardo, Conte di Leiningen-Dagsburg-Heidesheim.
Usingen lies on the Usa River in the Usinger Becken at the north-eastern edge of the Taunus. It is located about 30 km north of Frankfurt am Main, 27 km south of Wetzlar and 38 km northeast of Wiesbaden, putting it on the edge of the Frankfurt Rhein-Main Region . The town core is about 300 m above sea level.
Nassau-Usingen was a county of the Holy Roman Empire in the Upper Rhenish Circle that became a principality in 1688. The origin of the county lies in the medieval county of Weilnau that was acquired by the counts of Nassau-Weilburg in 1602.
Enrichetta di Nassau-Weilburg Francesco di Teck Claudine Rhédey von Kis-Rhéde: László Rhédey von Kis-Rhéde Ágnes Inczédy von Nagy-Várad Maria di Teck Adolfo, duca di Cambridge: Giorgio III del Regno Unito Carlotta di Meclemburgo-Strelitz Maria Adelaide di Cambridge Augusta d'Assia-Kassell: Federico d'Assia-Kassel Carolina di Nassau-Usingen
William Louis, Count of Nassau-Saarbrücken. Mother. Anna Amalia of Baden-Durlach. Walrad, Prince of Nassau-Usingen. Walrad Usingen of Nassau (25 [citation needed] February 1635 in Roermond [citation needed] – 17 October 1702 in Usingen ), was from 1659 Count, and from 1688 Prince of Nassau-Usingen and founder of Usingen line of the House of ...
Carolina Felicita di Leiningen-Dagsburg ... unknown son von Nassau-Usingen; Coniuge: Carlo Guglielmo di Nassau-Usingen (1760–1803) Controllo di autorit ...
La principessa Augusta d'Assia-Kassel, terza figlia del principe Federico d'Assia e della moglie, principessa Carolina di Nassau-Usingen, nacque a Rupenheim Castel, Kassel. Per via paterna era una bisnipote di Giorgio II di Gran Bretagna. Il fratello maggiore del padre, Guglielmo IX, era il langravio di Assia-Kassel.