Nam Định province
former province of Vietnam
Nam Định ([nām ɗîɲˀ] ) was a former province in the southern part of the Red River Delta region of Northern Vietnam.
On June 12, 2025, Nam Định, along with Hà Nam, was incorporated into Ninh Bình province.
History
Nam Định province's borders Ninh Bình province to the southwest, Hà Nam province to the northwest, Thái Bình province to the northeast, and the Gulf of Tonkin to the southeast. As of 2022, it is the 52nd largest province by area and the 13th most populous province of Vietnam. Vân Cù village, Nam Định is the place of origin of Phở.
It has been one of the most important regions of Vietnam throughout its history because it is located on the Red River Delta. It is the birthplace of many famous Vietnamese historical figures, most notably Trần Hưng Đạo. It is also said to be the place where the Vietnamese dish Phở came from.
Geography
Nam Định is subdivided into 9 district-level sub-divisions :
1 central-level city : Nam Định (capital).
9 rural districts : Giao Thủy, Hải Hậu, Nam Trực, Nghĩa Hưng, Trực Ninh, Vụ Bản, Xuân Trường, Ý Yên.
Begin with the source’s own compact description: “Nam Định province” is former province of Vietnam. The dossier treats that line as a proposition to test through Định, province and former, not as a finished interpretation.
Why this record matters
The phrase “former province of Vietnam” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
Place names and jurisdictional language are key evidence: both can reveal earlier catalogue descriptions and overlooked record series. The source revision retrieved here is dated Sep 12, 2026. The linked authority identifier is Q36907. VIAF identifies the subject as 145606177. The Library of Congress control number is n99830134. Authority coordinates are 20.250, 106.250. 3 of 4 selected statements include explicit references; 1 carry qualifiers and 0 use preferred rank. The first chronological checks are 2025 and 2022.
A single description cannot reconcile every naming convention, rebuilding phase or administrative transfer associated with a place. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Treat names, boundaries and functions as historically changeable. Maps, plans, inventories and administrative records can clarify what the place meant at different dates.
- Historic place names
- Jurisdictional context
- Routes into maps and plans
Contemporary maps, plans, listed-building records, estate papers and the responsible local or national archive.
Three-step research path
- Establish the record: confirm the title “Nam Định province”, its source revision and the description used here.
- Expand the search: follow Nam Định province primary sources, Nam Định province archive and Định research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Nam Định province”?
- What physical evidence or contemporary plan supports the description?
- Which authority defined the place, boundary or structure at the relevant date?
Search terms from this dossier
This entry incorporates text from “Nam Định province” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.