Leiningen-Westerburg

{{more citations needed|date=June 2024}}

{{Infobox former country

| conventional_long_name = Leiningen-Westerburg

| image_coat = Leiningen-westerburg.JPG

| capital = Leiningen

| year_end = 1547

| year_start = 1457

| event_start = Union of Leiningen and Westerburg

| event_end = Divided into Westerburg-Leiningen-Leiningen and Westerburg-Leiningen-Westerburg

}}

Leiningen-Westerburg was a historic state of the Holy Roman Empire, located in the vicinity of Leiningen and Westerburg in what is now the German state of Rhineland-Palatinate.{{Cite web |title=Brinkmeier, Ed. Genealogische Geschichte des uradeligen, reichsgräflichen und reichsfürstlichen, standesherrlichen, erlauchten Hauses Leiningen und Leiningen-Westerburg. Zweiter Band. Fascimile edition (1891). Elibron Classics, 2006. |website=FamilySearch |url=https://www.familysearch.org/en/wiki/Westerburg,_Germany#cite_ref-1}}

Leiningen-Westerburg was formed in 1467, when the last Landgrave of Leiningen died childless and Leiningen passed to his sister Margaret, who was married to Reinhard III of Westerburg. Reinhard's grandson moved his capital to Leiningen in 1481 and began styling himself Reinhard I of Westerburg-Leiningen.