Nonthaburi province
province in central Thailand
Nonthaburi is one of the central provinces (changwat) of Thailand, established by the Act Establishing Changwat Samut Prakan, Changwat Nonthaburi, Changwat Samut Sakhon and Changwat Nakhon Nayok, Buddhist Era 2489 (1946), which came into force on 9 May 1946 (Thursday).
Neighboring provinces are (from north clockwise) Phra Nakhon Si Ayutthaya, Pathum Thani, Bangkok, and Nakhon Pathom. Nonthaburi is the most densely populated province after Bangkok. The Bang Kwang Central Prison is in the province.
Geography
The province of Nonthaburi is located on the Chao Phraya River basin in central Thailand. It borders Bangkok to the south and to the east, the provinces of Pathum Thani and Phra Nakhon Si Ayutthaya to the north, and Nakhon Pathom to the west. The province is part of the greater Bangkok Metropolitan Region. With an area of 637 km2 (246 sq mi), it is the third smallest province in the country by land area.
In most parts, the provice is as urbanized as the capital, and the boundary between the two provinces is nearly unrecognizable. There is no forest area in the province.
Begin with the source’s own compact description: “Nonthaburi province” is province in central Thailand. The dossier treats that line as a proposition to test through Nonthaburi, province and central, not as a finished interpretation.
Why this record matters
The phrase “province in central Thailand” 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.
The strongest evidence will usually combine a dated visual record with documents produced by the authority responsible for the place. The source revision retrieved here is dated Sep 21, 2026. The linked authority identifier is Q242932. VIAF identifies the subject as 132637494. The Library of Congress control number is n88247444. Authority coordinates are 13.863, 100.514. 2 of 4 selected statements include explicit references; 1 carry qualifiers and 0 use preferred rank. The first chronological checks are 1946.
A single description cannot reconcile every naming convention, rebuilding phase or administrative transfer associated with a place. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. 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 “Nonthaburi province”, its source revision and the description used here.
- Expand the search: follow Nonthaburi province primary sources, Nonthaburi province archive and Nonthaburi 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 “Nonthaburi province”?
- Which authority defined the place, boundary or structure at the relevant date?
- What physical evidence or contemporary plan supports the description?
Search terms from this dossier
This entry incorporates text from “Nonthaburi 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.