Prince Alexander Sergeyevich Menshikov (Russian: Князь Алекса́ндр Серге́евич Ме́ншиков; 26 August 1787 – 2 May 1869) was a Russian nobleman, military commander and statesman. He was made adjutant general in 1817 and admiral in 1833.
A great-grandson of Alexander Danilovich Menshikov, Duke of Ingria, and a cognatic descendant of the Princely House of Golitsyn (another of his great-grandfathers was Prince Mikhail Golitsyn, the military governor of Åbo (Turku) during the Russian occupation in the Great Northern War). Menshikov entered the Russian service as attaché to the embassy at Vienna in 1809. He became close to Tsar Alexander I and accompanied him throughout his campaigns against Napoleon. In 1817 Menshikov was appointed acting Quartermaster general of the General Staff. In 1823, he was transferred to the ministry of foreign affairs. Menshikov retired from army service in 1824.