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John Wallace — 1940 US Census Record
Model Tree available1940 United States Federal Census · Los-Angeles-County, California
Our Model Tree links this John Wallace across the 1920, 1930 and 1940 US Censuses in Los-Angeles-County, California (XGBoost, ~Confirmed), with identified parents Mattie & Charles — first a son (b.~1902), then head of a 5-person household.
Age 38
b. ~1902
Male
Son
Born: Colorado
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Los-Angeles-County, California |
| Surname | Wallace |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Los Angeles City |
| 1935 Residence (County) | Los Angeles |
| Additional Details | |
| Occupation | Salesman |
| Industry | Fruit Juice Wholesale |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 607 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Occupation | Salesman |
| Township / Ward | Los Angeles City |
| Est. Birth Year | ~1902 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Mattie Wallace | Head | — | 60 | ~1880 |
| Louella Barber | Other | — | 56 | ~1884 |
| Roland Barber | Other | — | 49 | ~1891 |
| John Wallace | Son | — | 38 | ~1902 |
| Irwin Wallace | Son | — | 40 | ~1900 |
Census Appearances
1920
Los Angeles, …
Son, age 14
Los Angeles, California · implied b. ~1906 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Wallace |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Colorado |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1930
Los Angeles, …
Son, age 23
Los Angeles, California · implied b. ~1907 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Wallace |
| Given Name | John W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Colorado |
| Occupation | Salesman |
| Industry | Real Estate |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
Los-Angeles-County, California
Son, age 38
Los-Angeles-County, California · implied b. ~1902 — 5 household members
| Surname | Wallace |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Los Angeles City |
| 1935 Residence (County) | Los Angeles |
| Occupation | Salesman |
| Industry | Fruit Juice Wholesale |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 607 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
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 John Wallace across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Mattie Wallace (~0.92 confidence) and father Charles Conroy (~0.92 confidence) and mother Milton Wallace (~0.92 confidence) and mother Agnes Conroy (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Mattie Wallace
b. ~1880
Source mother
● Household
· direct · ~0.92
Father
Charles Conroy
b. ~1882
Source father
● Household
· direct · ~0.92
Mother
Milton Wallace
b. ~1887
Source mother
● Household
· direct · ~0.92
Mother
Agnes Conroy
b. ~1894
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Wallace
Son · 1940 · age 38 · b. ~1902 · California
★ You are viewing this record
Sibling
Irwin Wallace
Sibling · 1940 · age 40
Source co-child of head (derived)
● Co-child · derived · ~0.88
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-t0627-00416-00241)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Margaret Whicker | 49 | Wife | — | Minnesota |
| 2 | Whicker | None | — | — | — |
| 3 | James T Allan | 70 | Head | Medical Doctor | Scotland |
| 4 | Myrtle @ Allan | 66 | Wife | — | Iowa |
| 5 | Janet S. Allan | 25 | Dau | Saleswoman | California |
| 6 | Janet M. Allan | 62 | Sister | — | Scotland |
| 7 | Charles @ Conway | 58 | Head | History Teacher | Colorado |
| 8 | Mattie @ Wallace | 60 | Head | Practitioner | Colorado |
| 9 | Irwin Wallace | 40 | Son | Broker | Colorado |
| 10 | John Wallace THIS PERSON | 38 | Son | Salesman | Colorado |
| 11 | Roland Barber | 49 | Lodger | Accountant | Illinois |
| 12 | Louella Barber | 56 | Lodger | Housekeeper | Minnesota |
| 13 | Anson L. Bliss | 75 | Head | — | Illinois |
| 14 | Elizabeth Bliss | 80 | Wife | — | Kentucky |
| 15 | Wallace Wieth | 42 | Step-son | Mechanic | Illinois |
| 16 | Emery Moore | 72 | Bro-in-law | — | Illinois |
| 17 | Leonora Moore | 69 | Sister | — | Kentucky |
| 18 | George Otte | 83 | Head | — | Iowa |
| 19 | Olivia @ Otte | 79 | Sister | — | Iowa |
| 20 | George Johnston | 75 | Head | — | French Canadian |
| 21 | Henrietta Johnston | 71 | Wife | — | Canadian |
| 22 | Margaret Johnston | 31 | Dau | — | Maine |
| 23 | William Bradley | 74 | Bro-in-law | — | French Canadian |
| 24 | Thomas Johnston | 19 | Nephew | New Worker | Canada |
| 25 | Thomas Williams | 83 | Head | — | Wales |
| 26 | Ella Williams | 59 | Wife | — | Minnesota |
| 27 | Reese Williams | 42 | Son | — | Minnesota |
| 28 | Megan Williams | 40 | Dau-in-law | — | Wales |
| 29 | Robert Shaw | 42 | Head | Stationary Truck Driver | Tennessee |
| 30 | Margaret Shaw | 39 | Wife | Dressmaker | Texas |
| 31 | Dorothy Shaw | 19 | Dau | Dressmaker | Illinois |
| 32 | Juanita Shaw | 10 | Dau | — | California |
| 33 | Florence Simms | 63 | Lodger | — | England |
| 34 | Lola A. Cain | 53 | Head | Practical Nurse | Missouri |
| 35 | Ella Chaffee | 83 | Lodger | — | Ohio |
| 36 | Frank Parker | 90 | Lodger | — | New York |
| 37 | Lucie Parker | 90 | Lodger | — | New York |
| 38 | Jessie Soloman | 83 | Lodger | — | Indiana |
| 39 | Ann Whitenack | 38 | Nurse | Practical Nurse | Oklahoma |
| 40 | Carrie Walton | 62 | Nurse | Practical Nurse | Indiana |
Pedigree Summary
John + 1 sibling
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
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)