Johan Henrik Nebelong (1817—1871) was a Danish architect, and brother of Niels Sigfried Nebelong, worked in Norway from 1840 to 1853. Best known for Oscarshall (1847–1852). Other buildings are Tollpakkhuset (customs house), Kommandantboligen (Commanders living quarters at Akershus festning). Reconstructions on Heddal stavkirke, Telemark (1851).