South Yarmouth, Massachusetts
census-designated place in Barnstable County, Massachusetts, United States
South Yarmouth is an unincorporated village and census-designated place (CDP) in the town of Yarmouth in Barnstable, Massachusetts, United States. As of the 2020 census, South Yarmouth had a population of 11,703. It is the highest of the three CDPs in Yarmouth.
Geography
South Yarmouth is located in the southeastern quarter of the town of Yarmouth at 41°40′4″N 70°11′59″W (41.667908, -70.199774). It is bordered by the CDP of West Yarmouth to the west and West Dennis to the east. U.S. Route 6, the Mid-Cape Highway, is to the north, beyond which is the CDP of Yarmouth Port.
According to the United States Census Bureau, the CDP has a total area of 7.8 square miles (20.2 km2), of which 6.9 square miles (18.0 km2) is land and 0.85 square miles (2.2 km2) (10.94%) is water.
Demographics
2020 census
As of the 2020 census, South Yarmouth had a population of 11,703. The median age was 53.4 years. 14.9% of residents were under the age of 18 and 31.5% of residents were 65 years of age or older.
This brief starts where responsible research should: with the source description of “South Yarmouth, Massachusetts” as census-designated place in Barnstable County, Massachusetts, United States. Everything that follows is an evidence route, not borrowed authority.
Why this record matters
The subject matters to the places & architecture register because the source frames it as census-designated place in Barnstable County, Massachusetts, United States. Its deeper value depends on whether names, dates, institutions and citations support that framing.
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 Apr 28, 2026. The linked authority identifier is Q7568983. Authority coordinates are 41.668, -70.200. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 2020.
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 “South Yarmouth, Massachusetts”, its source revision and the description used here.
- Expand the search: follow South Yarmouth, Massachusetts primary sources, South Yarmouth, Massachusetts archive and South 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 “South Yarmouth, Massachusetts”?
- 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 “South Yarmouth, Massachusetts” 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.