Baron Johann Albrecht von Korff (November 30, 1697 – April 7, 1766) was a Russian diplomat, and was the president of the St.
Petersburg Academy of Sciences (1734–1740).
A native of Courland, he moved through his service at the court duchess of Courland (then Russian empress) Anna Ivanovna.
Since 1740 he was the Russian ambassador in Copenhagen.
His library (36,000 volumes) was purchased for the Crown Prince of Grand Duke Paul Petrovich, then it passed to the Crown Prince Constantine Pavlovich.