All sources · source collection
IPUMS USA: 1940 Decennial Census (Full Count)
IPUMS, University of Minnesota · 2024
Population measured
All US residents, 1940 (132 million records, full count)
Source notes & limitations
Kept for 1940s-room microdata work — the room currently cites published Census sources; this is the harmonized-microdata option for computed Tier B statistics, subject to IPUMS full-count terms. 1940 census was first to ask about income (wage/salary only — does not include self-employment, property income, or transfers). Housing variables: tenure, rooms, plumbing, electricity, radio, refrigerator, heating fuel. Procedural history: https://usa.ipums.org/usa/resources/voliii/enumproc1940.pdf. FULL COUNT DATA: subject to additional terms — will not be republished, not for genealogical research, will not link individual records with original enumeration images. Vitrine uses this data ONLY to compute aggregate statistics (medians, percentages) which are published as Facts; raw microdata is never committed.
Where this source appears
0 records across 0 decades and countries. Documented gaps are included; a source cited for a gap does not establish a value.
0 of 0 records have a current source audit. A transcription check reads a declared numeric field from a pinned local source file; a calculation replay reads its operands and applies the declared method and rounding rule. A source audit does not independently validate the source or every claim in a record. The date is the last successful local audit; the build checks that its bindings still match.
Registered, not yet cited by a room record.