The entire area of Hưng 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 Hưng Yên province, where adjacent to the Red River, about 60 km away from Hanoi.

In terms of beliefs and history, the area of Phố Hiến is considered one of the "cradles"[2] 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According to the historical document of the Roman Catholic Church and some records of Annamese officials, Bishop Pierre Lambert de la Motte had summoned the first Đàng-ngoày Council (Công-đồng Đàng-ngoày) here in 1670, and that event was considered as the beginning of the Christian history in the whole Hưng Yên province.

The city is well-known in the world (especially among historians) for Phố Hiến (an ancient port-city located in the area).