MC
Mary Cochran — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Los-Angeles-County, California
Our Model Tree links this Mary Cochran across the 1920, 1930 and 1940 US Censuses in Los-Angeles-County, California (XGBoost, ~Confirmed) — first a head (b.~1870), then head of a 3-person household.
Age 70
b. ~1870
Female
Head
Born: Illinois
Divorced
1940 Census Record Details
| Census Year | 1940 |
| Location | Los-Angeles-County, California |
| Surname | Cochran |
| Given Name | Mary D. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 70 |
| Marital Status | Divorced |
| Birthplace | Illinois |
| 1935 Residence (City) | Long Beach City |
| 1935 Residence (County) | Los Angeles |
| Additional Details | |
| Industry | 0 |
| Highest Grade | G 8 |
| 1935 Residence | California |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Long Beach City |
| Est. Birth Year | ~1870 |
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 |
|---|---|---|---|---|
| Gertrude Williams | Daughter | — | 52 | ~1888 |
| Mary Cochran | Head | — | 70 | ~1870 |
| Beverly Williams | Other | — | 14 | ~1926 |
Census Appearances
1920
Los Angeles, …
Head, age 45
Los Angeles, California · implied b. ~1875 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cochran |
| Given Name | May |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Real Estate |
| Industry | Office |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Los Angeles, …
Head, age 58
Los Angeles, California · implied b. ~1872
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | Cochran |
| Given Name | May |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 58 |
| Marital Status | Widowed |
| Birthplace | Illinois |
| Age at First Marriage | 20 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Saleslady |
| Industry | Novelties |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 50 |
| Radio Set | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Los-Angeles-County, California
Head, age 70
Los-Angeles-County, California · implied b. ~1870 — 3 household members
| Surname | Cochran |
| Given Name | Mary D. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 70 |
| Marital Status | Divorced |
| Birthplace | Illinois |
| 1935 Residence (City) | Long Beach City |
| 1935 Residence (County) | Los Angeles |
| Industry | 0 |
| Highest Grade | G 8 |
| 1935 Residence | California |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Cochran across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Cochran
Head · 1940 · age 70 · b. ~1870 · 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
40 people indexed on this census page (nara:1940:m-t0627-00371-00194)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Joseph Simone | 39 | Head | Band Master | Italy |
| 42 | Flora Simone | 33 | Wife | — | Virginia |
| 43 | Dorothy Simone | 13 | Daughter | — | Virginia |
| 44 | Edward A. Starr | 76 | Head | — | Georgia |
| 45 | Nanna M. Starr | 76 | Wife | — | Massachusetts |
| 46 | Fred Bruce | 62 | Head | — | Nebraska |
| 47 | Geraldine Bruce | 50 | Wife | — | Arkansas |
| 48 | Ida May Bruce | 17 | Daughter | — | California |
| 49 | Robert B. Mcculley | 30 | Head | Night Porter | Nebraska |
| 50 | Julia Crossman | 52 | Lodger | — | Iowa |
| 51 | Mayme Crossman | 20 | Lodger | — | Missouri |
| 52 | John D. Storey | 30 | Head | Gunnermate | Washington |
| 53 | Grace Storey | 35 | Wife | — | Virginia |
| 54 | William Hughes | 15 | Son | — | Maryland |
| 55 | Milton Hughes | 15 | Son | — | Maryland |
| 56 | Joe D. Scott | 25 | Head | — | Ohio |
| 57 | Margaret Morrison | 79 | Lodger | — | Ohio |
| 58 | Gerald H. Snyder | 20 | Head | Proprietor | Wyoming |
| 59 | Louise Snyder | 50 | Mother | — | Wisconsin |
| 60 | Maye Brink | 55 | Head | — | Minnesota |
| 61 | Viola Hess | 57 | Lodger | — | Iowa |
| 62 | Mildred Timm | 67 | Lodger | — | Wisconsin |
| 63 | Rachel Russell | 68 | Head | Saleslady | English |
| 64 | Maurice Boyle | 30 | Head | Writer Index | Oklahoma |
| 65 | Martina Boyle | 30 | Wife | — | Pennsylvania |
| 66 | William Harrison | 28 | Head | Electrician | North Carolina |
| 67 | Ida Harrison | 27 | Wife | — | South Carolina |
| 68 | Patricia Harrison | 2 | Daughter | — | South Carolina |
| 69 | Frank B. Jones | 56 | Head | — | Pennsylvania |
| 70 | Carrie Jones | 75 | Sister | — | Pennsylvania |
| 71 | Wanda S. Hemmers | 46 | Head | — | Iowa |
| 72 | Keith Hemmers | 15 | Son | — | Iowa |
| 73 | Mary D. Cochran THIS PERSON | 70 | Head | — | Illinois |
| 74 | Gertrude Williams | 52 | Daughter | Saleslady | Illinois |
| 75 | Beverly Williams | 14 | Grand Daughter | — | California |
| 76 | Jane I. Allice | 69 | Head | — | Canada |
| 77 | Anna Yontz | 77 | Head | — | Sweden |
| 78 | Kenneth Jensen | 54 | Head | Salesman | Utah |
| 79 | James Owen | 60 | Head | Proprietor | Missouri |
| 80 | Myrtle Owen | 51 | Wife | — | Missouri |
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)