Jambyl Region, formerly named Dzhambul Region until 1991, is a region of Kazakhstan. The population of the region is 1,209,665. Its administrative center is Taraz, with a population of 335,100. To the south the region borders Kyrgyzstan and nearly borders Uzbekistan in the southwest. Jambyl also borders three other provinces of Kazakhstan: Karaganda Region (to the north), Turkistan Region (to the west), and Almaty Region (to the east). The total area is 144,200 square kilometres (55,700 mi²). The province borders Lake Balkhash to its northeast. The province (and its capital during the Soviet era) was named after the Kazakh akyn (folk singer) Jambyl Jabayev.

The Dzhambul Region was formed by decree of the Presidium of the Supreme Soviet on October 14, 1939, and included nine districts, of which six were separated from the South Kazakhstan and three from the Alma-Ata region.

In August 2021, nine people were killed in a major explosion in at a Kazakhstani ammunition depot at a military unit in Taraz in the Jambyl Region of Kazakhstan. As a result, Minister of Defense Nurlan Yermekbayev announced his intent to resign on 27 August 2021. Four days later his resignation was accepted by President Kassym-Jomart Tokayev, with Yermekbayev accepting responsibility for the tragedy, and was succeeded by Lieutenant General Murat Bektanov. The leaders of foreign countries and international organizations delivered condolences and all government websites were grayscaled in memoriam.

As of 2020, the Jambyl Region has a population of 1,130,099.

Ethnic groups (2020):

The province is administratively divided into ten districts and the city of Taraz.

Janatas, Karatau, Shu, have the administrative status of town, whereas Taraz has the administrative status of a city.

Important industries include rock phosphate mining (around Karatau). The Chu River valley is one of Kazakhstan's important areas of irrigated agriculture.