Leopold Zunz (Hebrew: יום טוב צונץ—Yom Tov Tzuntz, Yiddish: ליפמן צונץ‎—Lipmann Zunz; 10 August 1794 – 17 March 1886) was the founder of academic Judaic Studies (Wissenschaft des Judentums ), the critical investigation of Jewish literature, hymnology and ritual. Zunz's historical investigations and contemporary writings had an important influence on contemporary Judaism.

Leopold may refer to:

Leopold I (full name: Leopold Ignaz Joseph Balthasar Felician; Hungarian: I. Lipót; 9 June 1640 – 5 May 1705) was Holy Roman Emperor, King of Hungary, Croatia, and Bohemia. The second son of Ferdinand III, Holy Roman Emperor, by his first wife, Maria Anna of Spain, Leopold became heir apparent in 1654 by the death of his elder brother Ferdinand IV. Elected in 1658, Leopold ruled the Holy Roman Empire until his death in 1705, becoming the longest-ruling Habsburg emperor (at 46 years and 9 months).

Leopold II (Peter Leopold Joseph Anton Joachim Pius Gotthard; 5 May 1747 – 1 March 1792) was Holy Roman Emperor, King of Hungary, and Bohemia from 1790 to 1792, and Archduke of Austria and Grand Duke of Tuscany from 1765 to 1790. He was the earliest opponent of capital punishment in modern history. He was a son of Emperor Francis I and his wife, Empress Maria Theresa, and the brother of Marie Antoinette, Queen of France, Maria Carolina of Austria and Joseph II, Holy Roman Emperor. Leopold was a moderate proponent of enlightened absolutism. He granted the Academy of Georgofili his protection. Despite his brief reign, he is highly regarded. The historian Paul W. Schroeder called him "one of the most shrewd and sensible monarchs ever to wear a crown".

Leopold, Prince of Hohenzollern (German: Leopold Stephan Karl Anton Gustav Eduard Tassilo Fürst von Hohenzollern) (22 September 1835 – 8 June 1905) was the head of the Swabian branch of the House of Hohenzollern, and played a fleeting role in European power politics, in connection with the Franco-Prussian War.

Leopold Philip Fürst Montecuccoli (1663 – January 6, 1698) was an Austrian Field Marshal.

Leopold Bellak (1916–2000) was an psychologist, psychoanalyst, and psychiatrist who pioneered the famous Children's Apperception Test CAT). He also collaborated on the Thematic Apperception Test. (TAT) on clinical psychological assessments, and pioneered the discovery of ADHD (Attention Deficit) as being a genetic disorder.. Dr. Bellak created the 67 year old publishing house, CPS Publishing LLC. www,cpspublishinginc.com.