Baghir Karbalayi Alasgar oglu Rzayev (1891, Iravan – 1927, Baku) was the secretary general of the Parliament of the Azerbaijan Democratic Republic, the administrative minister of the Araz Turkic Republic, a member of the Parliament of the Azerbaijan Democratic Republic, a member of the National Council of the Azerbaijan Democratic Republic, a member of the Transcaucasian Seim and the Muslim faction of the Transcaucasian Seim.

Baghir bey Rzayev was born in 1891 in Iravan. He studied in gymnasium. In 1911, he entered the Faculty of Law of Moscow University.

After the April invasion, he lived as an emigrant and later returned to Azerbaijan. In 1927, he did not tolerate political pressure and committed suicide.

As a member of the Muslim Socialist Bloc, Baghir Rzayev was elected to the Transcaucasian Seim, where he was a member of the Muslim faction and the Muslim Socialist Bloc group.

On May 27, 1918, he was elected a member of the National Council of the Azerbaijan Democratic Republic from the ranks of the Muslim Socialist Bloc.

He was one of the three deputies who objected to the concession of Iravan as the capital to the newly created Republic of Armenia at the meeting of the National Council of Azerbaijan held on May 31, 1918.

On December 7, 1918, Baghir bey Rzayev was directly admitted to the Parliament of the Azerbaijan Democratic Republic from the ranks of the National Council of the Azerbaijan Democratic Republic. At the 2nd session of the Parliament on December 15, 1918, his membership was approved by voting. He represented the Socialist faction in the parliament.

On January 28, 1919, Baghir bey Rzayev was expelled from the parliament and Ibrahim Abilov was elected as a member instead.

On May 15, 1919, Bagir bey Rzayev was nominated to the parliament by the Socialists faction instead of Mahammad Maharramov, who withdrew from membership.