Port St. John, Florida
census designated place in Brevard County, Florida, United States

Port St. John is a census-designated place located between Titusville and Cocoa in Brevard County, Florida. The population was 23,474 at the 2020 United States census, up from 12,267 at the 2010 United States census. It is part of the Palm Bay–Melbourne–Titusville, Florida Metropolitan Statistical Area.
Geography
According to the United States Census Bureau, the CDP has a total area of 3.8 square miles (9.8 km2), all of it land.
History
In 2002, a group of five Port St. John residents formed "Port St. John For Tomorrow" (PSJ4T) and tried to incorporate the Port St. John area. Included in PSJ4T's incorporation plans were five separate communities: Delespine, Williams Point, Hardeeville, Frontenac and a part of Sharpes.
Begin with the source’s own compact description: “Port St. John, Florida” is census designated place in Brevard County, Florida, United States. The dossier treats that line as a proposition to test through Port, John and Florida, not as a finished interpretation.
Why this record matters
The phrase “census designated place in Brevard County, Florida, United States” 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.
Maps, plans, fabric surveys and administrative records can establish how the site’s name, extent and function changed over time. The source revision retrieved here is dated Aug 13, 2026. The linked authority identifier is Q945047. VIAF identifies the subject as 145459655. The Library of Congress control number is n83220657. Authority coordinates are 28.477, -80.789. 2 of 3 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 2020, 2010 and 2002.
Modern boundaries and familiar names can conceal earlier jurisdictions or structures that do not align with the present site. 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 “Port St. John, Florida”, its source revision and the description used here.
- Expand the search: follow Port St. John, Florida primary sources, Port St. John, Florida archive and Port 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 “Port St. John, Florida”?
- 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 “Port St. John, Florida” 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.