Gustav Groß (1856–1935) was a national liberal German Bohemian politician.
Gustav Groß was born on 12 June 1856 at Reichenberg in the Kingdom of Bohemia, a part of the Austrian Empire. His father, Gustav Robert Groß, was a railway industrialist, and a participant in the Frankfurt Parliament, as part of the 1848 revolutions across the German Confederation. Gustav Groß studied political economics at the universities of Vienna and Berlin. From 1877 to 1881, he was a political official in the province of Lower Austria and from 1885, a privatdozent (independent professor) of political economics at the University of Vienna. He later moved to Iglau, and became a member of the Diet of the Margraviate of Moravia. In 1889, he was elected to the House of Deputies (German: Abgeordnetenhaus), the lower house of the Imperial Council. He represented the city of Iglau as a German liberal. Whilst in the House of Deputies, he became a spokesman for all ethnic Germans in the Council. He was a member of the German School League, and was chairman of the League from 1885. Groß was also a biographer of Karl Marx .