Hoàng Diệu (chữ Hán: 黃耀, 14 March 1829 – 25 April 1882), born Hoàng Kim Tích (黃金錫), courtesy name Quang Viễn, was a Nguyễn dynasty Governor-general of Hà - Ninh, who committed suicide after failure in protecting Hà Nội citadel.

The attempt was early exposed, and its top leaders, Hồng Tập and Nguyễn Văn Viện were sentenced to the guillotine.

Hoàng Diệu came to take the chief position of Hương Trà district instead of Tôn Thất Thanh, who was sentenced to jail for aiding the coup.

[4] Hoàng Diệu committed suicide by hanging when the French under captain Henri Rivière, having exceeded his superiors' orders, suddenly took the citadel of Hanoi on 25 April 1882.

[5][6][7][8] Hoàng Diệu is venerated alongside Nguyễn Tri Phương by the Vietnamese people as loyal subjects who sacrificed themselves for Vietnam.