MS
Mary Spencer — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Los-Angeles-County, California
Our Model Tree links this Mary Spencer across the 1920, 1930 and 1940 US Censuses in Los-Angeles-County, California (XGBoost, ~Confirmed) — first a head (b.~1867), then head of a 3-person household.
Age 73
b. ~1867
Female
Head
Born: Iowa
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Los-Angeles-County, California |
| Surname | Spencer |
| Given Name | Mary V. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 73 |
| Marital Status | Widowed |
| Birthplace | Iowa |
| 1935 Residence (City) | Los Angeles City |
| 1935 Residence (County) | Los Angeles |
| Additional Details | |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Los Angeles City |
| Est. Birth Year | ~1867 |
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 |
|---|---|---|---|---|
| Ruth Spencer | Daughter | — | 46 | ~1894 |
| Mary Spencer | Head | — | 73 | ~1867 |
| Harold Spencer | Son | — | 42 | ~1898 |
Census Appearances
1920
Los Angeles, …
Head, age 53
Los Angeles, California · implied b. ~1867 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Spencer |
| Given Name | Mary E. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 53 |
| Marital Status | Widowed |
| Birthplace | Iowa |
| Father's Birthplace | Holland |
| Mother's Birthplace | Holland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Los Angeles, …
Head, age 63
Los Angeles, California · implied b. ~1867 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Spencer |
| Given Name | May D. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 63 |
| Marital Status | Widowed |
| Birthplace | Iowa |
| Age at First Marriage | 26 |
| Father's Birthplace | Holland |
| Mother's Birthplace | Holland |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 25,000 |
| Radio Set | R |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Los-Angeles-County, California
Head, age 73
Los-Angeles-County, California · implied b. ~1867 — 3 household members
| Surname | Spencer |
| Given Name | Mary V. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 73 |
| Marital Status | Widowed |
| Birthplace | Iowa |
| 1935 Residence (City) | Los Angeles City |
| 1935 Residence (County) | Los Angeles |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 Spencer across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Spencer
Head · 1940 · age 73 · b. ~1867 · 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 — Los-Angeles-County, California
Open full size
1940 US Federal Census — Los-Angeles-County, California
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00401-00550)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary Lou Bernard | 11 | Granddaughter | — | California |
| 42 | Vivian Barlow | 36 | Head | Operator | Utah |
| 43 | Grace R. Norwood | 54 | Partner | Gown Fitter | Nebraska |
| 44 | Isadore Shannon | 35 | Head | Buyer | New York |
| 45 | Martha Shannon | 35 | Wife | — | Pennsylvania |
| 46 | Frances Irish | 27 | Partner | — | Pennsylvania |
| 47 | Tekla Mayer | 49 | Head | — | Germany |
| 48 | Hazel Burns | 48 | Head | Cashier | Missouri |
| 49 | R. Harold Garner | 32 | Head | Escrow Clerk | Georgia |
| 50 | Lyle Edith Cravens | 40 | Head | Proofreader | Utah |
| 51 | Abbie J. Arnit | 42 | Sister | Proofreader | Utah |
| 52 | Margaret Cravens | 28 | Sister | Buyer | California |
| 53 | Charles Macfarlane | 58 | Head | Accountant | Canada French |
| 54 | Isabel Macfarlane | 54 | Wife | — | Canada English |
| 55 | Julia F. Long | 44 | Head | Teacher | Pennsylvania |
| 56 | Helene Splane | 41 | Partner | Teacher | Washington |
| 57 | Jerry Cooper | 32 | Head | Jeweler | Russia |
| 58 | Robin Dayman | 28 | Head | Advertising Copywriter | Oregon |
| 59 | Lewis L. Marks | 34 | Partner | Commodity Officer | New York |
| 60 | Catherine Mccallum | 42 | Head | Secretary | Illinois |
| 61 | Herbert C. Brett | 35 | Head | Accountant | British Columbia |
| 62 | James Kenneth Brett | 37 | Brother | Accountant | British Columbia |
| 63 | Orel Wright | 39 | Head | Interviewer | Pennsylvania |
| 64 | Louis Nichols | 30 | Head | Manager | Massachusetts |
| 65 | Willard C. Denton | 50 | Head | Druggist | Indiana |
| 66 | Vera Agnes Denton | 48 | Wife | — | Michigan |
| 67 | Mary Mellow | 45 | Head | — | Kansas |
| 68 | Bert L. Ammerman | 52 | Head | — | Wisconsin |
| 69 | Alice L. Ammerman | 44 | Daughter | — | Illinois |
| 70 | Mary V. Spencer THIS PERSON | 73 | Head | — | Iowa |
| 71 | Ruth Spencer | 46 | Daughter | — | California |
| 72 | Harold V. Spencer | 42 | Son | Salesman | California |
| 73 | D. J. Bussell | 55 | Head | Practitioner | Kansas |
| 74 | Josephine Bussell | 52 | Wife | — | Iowa |
| 75 | John B. Emerald | 72 | Head | Interior Decorator | Italy |
| 76 | Hera Emerald | 48 | Wife | — | Virginia |
| 77 | Gee Kee Hom | 61 | Head | Owner | Montana |
| 78 | Way Noy Hom | 31 | Son | Laborer | China |
| 79 | Way Hilma Hom | 29 | Son | — | China |
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)