Nicolai Johan Lohmann Krog (6 July 1787 – 15 October 1856) was First Minister of Norway (1836–1855).

He also held several other ministerial posts in the period 1821–1855 including Chief of the Ministry of the Army and Navy.

[2] In 1814, he was in the service of Prince Christian Frederik of Denmark as adjutant in his general staff.

In 1821, Krog was called to Stockholm as acting minister, and followed Crown Prince Oscar on his European tour to find a bride.

He resigned as a government minister in 1855 and died at Christiania in 1856 and was buried at Krist kirkegård.