Hðng Yên () is a former city located in the Red River Delta of the Northern Vietnam. It was the capital of Hðng Yên Province and is a third-graded city according to Vietnam's urban classification table.
Hðng Yên ceased to exist as a municipal city on 1 July 2025, following the elimination of district level units in Vietnam.
Hðng Yên city was originally the expansion of Phá» Hiến (Hiến Street), a river port that appeared earliest in the 16th century.
Phá» Hiến has a position as a place where Sán Nam garrison's government was located. However, its area was relatively small. It only consists of a public authority, XÃÂch ÃÂằng Literary Temple and a few markets. During several centuries, this location was an important gateway of the commercial platform in ÃÂông Kinh.
It was not until the French set a protective regime that Phá» Hiến was expanded to Hðng Yên town (thá» xã Hðng Yên).
According to the 2021 statistical yearbook of the whole Hðng Yên province, Hðng Yên city covers an area of 73.89 km<sup>2</sup>.
Hðng Yên is a delta municipality. The entire area of Hðng Yên city is almost flat, which tends to be sunken from the Northeast to the Southwest. It is located in the farthest position to the South of Hðng Yên province, where adjacent to the Red River, about 60 km away from Hanoi. Besides, Hðng Yên owns two sediment isles near the territory of Hanoi, where includes communes Phú Cðá»Âng and Hùng Cðá»Âng.
Hðng Yên borders Kim ÃÂá»Âng district to the North and Tiên Lữ district to the East. The Red River is the natural boundary between Hðng Yên and HàNam province's Lý Nhân district and Duy Tiên district. National Route 38 and Yên Lá»Ânh bridge connect the city to National Route 1st across the Red River.
As of 2021 Hðng Yên city had a population of 118,646. In particular, all people are registered as Kinh.
Hðng Yên city was divided into 6 wards: An Tảo, Hiến Nam, Há»Âng Châu, Lam Sán, Lê Lợi, Minh Khai and 9 communes: Bảo Khê, Hoàng Hanh, Hùng Cðá»Âng, Liên Phðáng, Phú Cðá»Âng, Phðáng Nam, Quảng Châu, Tân Hðng, Trung Nghéa.
In terms of beliefs and history, the area of PhỠHiến is considered one of the "cradles" of the Catholic Church in Vietnam.
According to the historical document of the Roman Catholic Church and some records of Annamese officials, Bishop Pierre Lambert de la Motte had summoned the first ÃÂàng-ngoày Council (Công-ÃÂá»Âng ÃÂàng-ngoày) here in 1670, and that event was considered as the beginning of the Christian history in the whole Hðng Yên province. Therefore, since December 23, 1673, Hðng Yên city has been considered a traditional address to have the regular meetings of Dinh-Hiến Council (Công-ÃÂá»Âng Dinh-Hiến), under order Apostolatus Officium by Pope Clement X.
Currently, the territory of Hðng Yên city is part to ÃÂông Hðng Yên Deanery, belonged to Thái Bình Cathedral Diocese.
The city is well-known in the world (especially among historians) for PhỠHiến (an ancient port-city located in the area). There are still a lot of ancient Asian church, temples, pagodas and other religious buildings here.
Nhãn lá»Âng (fruit of dragon eye) is one of Hðng Yên's specialties.