Ernst, 7th Prince of Hohenlohe-Langenburg was a German aristocrat and Prince of Hohenlohe-Langenburg. He served as the Regent of the Duchy of Saxe-Coburg and Gotha during the minority of his wife's cousin, Duke Charles Edward, from 1900 to 1905.

Hohenlohe-Langenburg was a German county and later principality in the Holy Roman Empire. It was located around Langenburg in what is now northeastern Baden-Württemberg, Germany. Starting in medieval times and continuing until 1806, this small state was ruled by a branch of the House of Hohenlohe, first as lords, then as counts and ultimately as ruling princes of the Holy Roman Empire after 1764. The princely House of Hohenlohe-Langenburg still owns and lives in Langenburg Castle today.