Ferdinand Meldahl (16 March 1827 – 3 February 1908) was a Danish architect best known for the reconstruction of Frederiksborg Castle after the fire in 1859. Meldahl was one of the leading proponents of historicism in Denmark.
As a member of the municipal council of Copenhagen Municipality for 27 years from 1866, Meldahl managed to significantly influence the city.
In 1857, he became a member of the Royal Danish Academy of Fine Arts and in 1863 a professor at the academy. He was its manager from 1873 to 1890.
In 1904, he was appointed a Knight Grand Cross of the Royal Victorian Order on the occasion of the visit of King Edward VII of the United Kingdom. At the time he was Chamberlain to the King Christian IX of Denmark and Vice President of the Danish Royal Academy of Arts.