Phú Lðáng was a rural district of Thái Nguyên province in the Northeast region of Vietnam. As of 2003, the district had a population of 106,834. The district covers an area of 369 km<sup>2</sup>. The district capital lies at .
After 1996, Phú Lðáng had 3 towns: ÃÂu, Chợ Má»Âi, Giang Tiên and 23 communes: Bình VÃÂn, Cá» Là ©ng, ÃÂá»Âng ÃÂạt, Hợp Thành, Nhð Cá»Â, Nông Hạ, Nông Thá»Ânh, ÃÂn Lðáng, Phấn Má»Â, Phú ÃÂô, Phá»§ Lý, Quảng Chu, Sán Cẩm, Thanh ÃÂình, Tức Tranh, Vô Tranh, Yên Cð, Yên ÃÂénh, Yên ÃÂá»Â, Yên Hân, Yên Lạc, Yên Ninh, Yên Trạch.
Before Nghá» quyết sá» 1683/NQ-UBTVQH15, Phú Lðáng had 2 towns and 14 communes: ÃÂu, Giang Tiên, Cá» Là ©ng, ÃÂá»Âng ÃÂạt, Hợp Thành, ÃÂn Lðáng, Phú ÃÂô, Phá»§ Lý, Tức Tranh, Vô Tranh, Yên ÃÂá»Â, Yên Lạc, Yên Ninh, Yên Trạch.
Phú Lðáng district bordered:
On January 1st, 1997, Thái Nguyên was established from Bắc Thái province, transferred 9 communes and 1 town, Yên Hân, Yên Cð, Nhð Cá»Â, Bình VÃÂn, Quản Chu, Yên ÃÂénh, Thanh Bình, Nông Hạ, Nông Thá»Ânh and Chợ Má»Âi town was transferred to Bạch Thông district, Bắc Kạn
On December 13, 2013, ÃÂu was expanded by incorporating 339,77 ha of ÃÂá»Âng ÃÂạt and 388,08 ha of Phấn Má» .
On August 18th, 2017, Sán Cẩm commune was transferred to Thái Nguyên city under Nghá» quyết sá» 422/NQ-UBTVQH14.
On December 1st, 2024, Phấn Má» was dissolved, the areas was integrated into ÃÂu and Giang Tiên under Nghá» quyết sá» 1240/NQ-UBTVQH15.
On June, 2025. the Standing Committee of the National Assembly of Vietnam passed NghỠquyết sỠ1683/NQ-UBTVQH15. In which,