Alexander Vasilyevich Korzhakov (Russian: Александр Васильевич Коржаков; born 31 January 1950) is a Russian former KGB general who served as Boris Yeltsin's bodyguard, confidant, and adviser for eleven years. He was the head of the Presidential Security Service (PSB) from 1991 to 1996, State Duma deputy from 1997 to 2011, and retired Lieutenant-general. Korzhakov had been Yeltsin's bodyguard since 1985, and on 19 August 1991, he stood next to his boss on top of a tank during Yeltsin's historic speech.

Being the Chief of the Security Service, Korzhakov was widely criticized for interfering in government affairs and business. In 1996, he was finally sacked after losing a power struggle with the Prime Minister. He then successfully ran for a seat in the State Duma where he received immunity from prosecution. In 1997, Korzhakov published a biography based on his experience at the very top of Russian politics. In the biography he contends that he and the Security Service "governed the country for three years".

Alexander Korzhakov was born in Moscow to a worker family. After graduating at secondary school, he worked as an assembly worker. In 1969–1970 he served as a private in the Kremlin Regiment. In 1970–1989 he served in the KGB 9th Chief Directorate, "Protection of Higher Party and Government Officials". As a KGB official, he became a member of the Communist Party in 1971, being a member of the Party bureau of subdivisions and member of the committee of the Komsomol for the 9th administration.

In 1978 he was transferred into a KGB subdivision, which dealt with personal protection. In 1980 he graduated "by Correspondence" from a Moscow Law Institute (Russian: Всесоюзный юридический заочный институт Moskovskiy Yuridichesky Institut, Zaochny fakultet). Following service in Afghanistan in 1981–1982, he was one of General Secretary Yuri Andropov's personal bodyguards in 1983–1984. In 1985 he became one of three personal bodyguards of Boris Yeltsin, who at the time was the leader of the Communist Party organization in Moscow. When, in 1987, Yeltsin was removed from his party position, Korzhakov kept the friendship and in 1989 was retired from KGB for his support of Yeltsin – officially, Korzhakov was discharged from the KGB due to "health and age reasons". After his retirement he became a private body guard of Yeltsin, albeit officially worked as the Chief of Security of a co-operative named "Plastic".

In 1989, Korzhakov gave notice about his resignation from the Communist Party and was subsequently expelled for "non-payment of the party dues".

After the incident on 28 September 1989, when Boris Yeltsin fell from a bridge, Korzhakov set up a unit of former KGB agents to protect Yeltsin. Following the election of Yeltsin in June 1991 as President of the RSFSR, Korzhakov became the Chief of Yeltsin's Security Service, which was later transformed into the Presidential Security Service when the Soviet Union was dissolved. He was responsible for the protection of Yeltsin during the August coup attempt in 1991 and on 4 October 1993, when the White House of Russia was stormed.

Being the head of the Presidential Security Service, Korzhakov was frequently accused of interfering in governmental affairs, as the Service gathered evidence on high government officials engaged in corruption, bribe-taking, and squandering money. He was regarded as one of the hard-liners of Yeltsin's team, a strong backer of the war in Chechnya, and an opponent to holding the presidential election in 1996.

In December 1994, Korzhakov organized an armed raid on the Moscow headquarters of Most Bank headed by Vladimir Gusinsky, an ally with Moscow Mayor Yuriy Luzhkov, who was a potential rival to Yeltsin in the 1996 presidential elections. Soon after the raid, Luzhkov denied he had any desire to run for president – and Gusinsky quickly moved with his family to London.