Hornberg is a city in the Ortenaukreis, in western Baden-Württemberg, Germany. It is situated in the Black Forest, 35 km southeast of Offenburg, and 25 km northwest of Villingen-Schwenningen.

Hornberg is the location of the Duravit Design Center. The center has a viewing platform designed by Philippe Starck. This viewing platform is arguably the largest toilet bowl in the world. Duravit also has a production facility in Hornberg.

The family brewery M. Ketterer GmbH & Co.KG is also located in Hornberg.

Hornberg has a railway station on the Black Forest Railway. The route the railway takes to Sankt Georgen im Schwarzwald is considered one of the most spectacular parts of the route.

• Andreas Beck [de] (born 1948), physician (head of the radiology department of the hospital Konstanz), theologian and writer
• Wilhelm Hausenstein (1882–1957), writer, art critic and cultural historian, journalist and diplomat
• Friedrich Jeckeln (1895–1946), Nazi SS officer and Police Leader executed for war crimes
• Thomas Schäuble (1948–2013), German politician (CDU), Director of the Baden State Brewery Rothaus, brother of Wolfgang Schäuble

• Rochus Misch (1917–2013), bodyguard and telephone operator for Adolf Hitler; had a business for painters in Hornberg before the war
• Wolfgang Schäuble (1942–2023), German politician (CDU), grew up in Hornberg
• Reinold of Urslingen (around 1364-1442), Knight, 1437 share ownership of the castle and city Hornberg

• (in German) Information about and images
• Hornberg on the Schwarzwald Portal (Black Forest Portal), a tourist website