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Mary Marsh — 1940 US Census Record
Linked across censuses1940 United States Federal Census · San-Mateo-County, California
Our Model Tree links this Mary Marsh across the 1930 and 1940 US Censuses in San-Mateo-County, California (XGBoost, ~Confirmed) — first a spouse (b.~1879), then head of a 3-person household.
Age 61
b. ~1879
Female
Spouse
Born: California
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Mateo-County, California |
| Surname | Marsh |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 61 |
| Marital Status | Married |
| Birthplace | California |
| 1935 Residence (City) | San Mateo |
| 1935 Residence (County) | San Mateo |
| Additional Details | |
| Class of Worker | H |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | California |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | San Mateo City |
| Est. Birth Year | ~1879 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Joe Marsh | Head | — | 63 | ~1877 |
| Mary Marsh | Spouse | — | 61 | ~1879 |
| Adeline Marsh | Daughter | — | 25 | ~1915 |
Census Appearances
1930
San Mateo, …
Spouse, age 51
San Mateo, California · implied b. ~1879 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Marsh |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | California |
| Age at First Marriage | 21 |
| Father's Birthplace | Azores |
| Mother's Birthplace | Azores |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
San-Mateo-County, California
Spouse, age 61
San-Mateo-County, California · implied b. ~1879 — 3 household members
| Surname | Marsh |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 61 |
| Marital Status | Married |
| Birthplace | California |
| 1935 Residence (City) | San Mateo |
| 1935 Residence (County) | San Mateo |
| Class of Worker | H |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | California |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Mary Marsh across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Marsh
Spouse · 1940 · age 61 · b. ~1879 · California
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — San-Mateo-County, California
Open full size
1940 US Federal Census — San-Mateo-County, California
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00330-00529)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Royal Fulpton | 40 | Head | Electrician | California |
| 2 | Margaret Fulpton | 38 | Wife | Operator | England |
| 3 | Mary Fulpton | 12 | Daughter | — | California |
| 4 | Danamelo Bocconi | 59 | Head | — | Italy |
| 5 | Eugene Bocconi | 32 | Son | Elec Contractor | Italy |
| 6 | Angelo Perozzo | 54 | Head | Laborer | Italy |
| 7 | Erminia Perozzo | 57 | Wife | — | Italy |
| 8 | Herman Mangini | 25 | Head | Gardener | California |
| 9 | Irma Mangini | 22 | Wife | Bookkeeper | Canada |
| 10 | Lee Lee | 32 | Head | Bell Boy | Philip Island |
| 11 | A Ponce | 39 | Boarder | Bus Boy | Philip Island |
| 12 | James Hogg | 59 | Head | Auto Mechanic | Scotland |
| 13 | Margaret Hogg | 52 | Wife | — | Scotland |
| 14 | Nancy Hogg | 27 | Daughter | Secty | Scotland |
| 15 | Ernest Dunn | 45 | Head | Mail Carrier | Calif |
| 16 | Evalyn Dunn | 41 | Wife | — | Calif |
| 17 | Jan Dunn | 11 | Daughter | — | Calif |
| 18 | Clarence Strain | 38 | Head | Printer | Pennsylvania |
| 19 | Susan Strain | 37 | Wife | — | Pennsylvania |
| 20 | Chas R Cheney | 62 | Head | Genl Mechanic | California |
| 21 | Emma Cheney | 64 | Wife | — | California |
| 22 | Mary Headrick | 57 | Head | — | California |
| 23 | Kathleen Headrick | 22 | Daughter | — | California |
| 24 | Gordon Headrick | 21 | Son | Porter | California |
| 25 | Wm C Headrick | 68 | Husband | — | Tennessee |
| 26 | Charles Peterson | 54 | Roomer | Electrician | New York |
| 27 | Joe Marsh | 63 | Head | Repair Man | California |
| 28 | Mary Marsh THIS PERSON | 61 | Wife | — | California |
| 29 | Adeline Marsh | 25 | Daughter | — | San Mateo |
| 30 | Lynwood Maclean | 35 | Head | Accountant | Florida |
| 31 | Margaret Maclean | 39 | Wife | — | Alabama |
| 32 | Lawrence Maclean | 20 | Son | — | Alabama |
| 33 | Lynwood Jr Maclean | 23 | Son | Accountant | Alabama |
| 34 | Florence Maclean | 21 | In-law | — | Tennessee |
| 35 | John Owens | 53 | Head | Horseman | Wales |
| 36 | Myrtle I Owens | 49 | Wife | Stenog | California |
| 37 | Jacquelyn Owens | 14 | Daughter | — | California |
| 38 | William R Eustice | 55 | Head | Carpenter | California |
| 39 | Elizabeth Eustice | 55 | Wife | — | California |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)