Johan Daniel Herholdt (13 August 1818 – 11 April 1902) was a Danish architect, professor and royal building inspector.

In quiet months when work was scarce, he attended evening classes at the Royal Academy and took drawing lessons in the daytime, studying first under Gustav Hetsch and later Michael Gottlieb Bindesbøll.

His major breakthrough came when he won the first architectural competition of its kind in Denmark, for the design of a new building for the Copenhagen University Library.

His winning Neo-Gothic design started a trend in Danish architecture which was typified by the strong use of red brick in large-scale cultural and civic buildings.

[3] His later works include Copenhagen's second Central Station and a building for the National Bank of Denmark, both demolished, and Odense City Hall.