MJ
Margaret Johnston — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Los Angeles, California
Our Model Tree links this Margaret Johnston across the 1930 and 1940 US Censuses in Los Angeles, California (XGBoost, ~Confirmed) — first a daughter (b.~1911), then head of a 8-person household.
Age 19
b. ~1911
Female
Daughter
Born: Canada English
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Los Angeles, California |
| Surname | Johnston |
| Given Name | Margaret M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Canada English |
| Naturalization Status | First papers filed |
| Year of Immigration | 1924 |
| Father's Birthplace | Free State Ireland |
| Mother's Birthplace | Canada English |
| Additional Details | |
| Occupation | Bookkeeper |
| Industry | Gas Furnace |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Canada |
| Birthplace (normalized) | canada english |
| Occupation | Bookkeeper |
| Township / Ward | Venice Township Prec 1 |
| Est. Birth Year | ~1911 |
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.
8 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| Stella Johnston | Daughter | — | 18 | ~1912 |
| Allen Johnston | Son | — | 15 | ~1915 |
| Lucy Johnston | Daughter | — | 7 | ~1923 |
| Margaret Johnston | Daughter | — | 19 | ~1911 |
| Irene Johnston | Spouse | — | 38 | ~1892 |
| Herbert Johnston | Son | — | 20 | ~1910 |
| Patrick Johnston | Head | — | 44 | ~1886 |
| Gerald Johnston | Son | — | 13 | ~1917 |
Census Appearances
1930
Los Angeles, …
Daughter, age 19
Los Angeles, California · implied b. ~1911 — 8 household members
| Surname | Johnston |
| Given Name | Margaret M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Canada English |
| Naturalization Status | First papers filed |
| Year of Immigration | 1924 |
| Father's Birthplace | Free State Ireland |
| Mother's Birthplace | Canada English |
| Occupation | Bookkeeper |
| Industry | Gas Furnace |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Canada |
| Birthplace (normalized) | canada english |
1940
Los-Angeles-County, California
Daughter, age 30
Los-Angeles-County, California · implied b. ~1910 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnstone |
| Given Name | Martha F. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Canada English |
| 1935 Residence (City) | Los Angeles |
| 1935 Residence (County) | Los Angeles |
| Naturalization Status | Naturalized |
| Occupation | Filing Clerk |
| Industry | Court Reporter |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 600 |
| Highest Grade | C-4 |
| 1935 Residence | Same house |
| Birth Country | Canada |
| Birthplace (normalized) | canada english |
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 Margaret Johnston across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Margaret Johnston
Daughter · 1930 · age 19 · b. ~1911 · California
★ You are viewing this record
Sibling
Stella Johnston
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Herbert Johnston
Sibling · 1930 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lucy Johnston
Sibling · 1930 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Allen Johnston
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gerald Johnston
Sibling · 1930 · age 13
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
1930 US Federal Census — Los Angeles, California
Open full size
1930 US Federal Census — Los Angeles, California
Page Contents
46 people indexed on this census page (ia:1930:californiacensus00reel176:0166)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Brooke Maltby | 59 | Mother-in-law | — | Indiana |
| 56 | Anna L. Matthews | 50 | Head | — | Illinois |
| 57 | Gordon Matthews | 35 | Son | Clerk | Illinois |
| 58 | Matthews | None | — | — | — |
| 59 | Jack C. Harrar | 42 | Head | Chef | New York |
| 60 | Lillian E. Harrar | 46 | Wife | Waitress | Pennsylvania |
| 61 | Gordon C. Harrar | 15 | Son | Messenger | Kentucky |
| 62 | Oliva L. Harrar | 39 | Wife | — | New York |
| 63 | Charles G. Harrar | 66 | Father | Secretary | Kentucky |
| 64 | Anna B. Harrar | 57 | Mother | — | Kentucky |
| 65 | Fannie S. Harrar | 66 | Aunt | — | Kentucky |
| 66 | James Dorkey | 45 | Head | Purch. | California |
| 67 | Mary M. Dorkey | 45 | Wife | — | Michigan |
| 68 | John Dorkey | 20 | Son | — | California |
| 69 | James C. White | 60 | Head | Supervisor | Massachusetts |
| 70 | Aurora White | 44 | Wife | — | Massachusetts |
| 71 | James J. White | 12 | Son | — | California |
| 72 | Frank J. White | 19 | Brother | — | Massachusetts |
| 73 | Jack S. Sherwood | 27 | Head | Illustrator | England |
| 74 | Ruth D. Sherwood | 37 | Wife | — | Iowa |
| 75 | Maxine F. Sherwood | 8 | Daughter | — | Washington |
| 76 | Richard C. Unzelant | 36 | Head | Optometrist | New York |
| 77 | Esther Unzelant | 35 | Wife | — | New York |
| 78 | Richard C. Unzelant | 14 | Son | — | California |
| 79 | Harry C. Mitchell | 64 | Head | Janitor | England |
| 80 | Mary E. Mitchell | 60 | Wife | — | Ireland |
| 81 | Eleanor M. Mitchell | 25 | Daughter | Stenographer | California |
| 82 | H. Cyril Mitchell | 30 | Son | Clerk | New Jersey |
| 83 | Hilda Sarah Mitchell | 35 | Daughter | Asst. Manager | Ohio |
| 84 | James Healy | 32 | Head | Asst. Manager | Iowa |
| 85 | Marie B. Healy | 32 | Wife | — | South Dakota |
| 86 | Earl W. Myers | 29 | Head | Executive | California |
| 87 | Mary Lou Myers | 28 | Wife | — | California |
| 88 | Helen L. Myers | 8 | Daughter | — | California |
| 89 | Oscar De Schaaf | 36 | Head | Chef | Switzerland |
| 90 | Ruben De Schaaf | 26 | Wife | Typist | Missouri |
| 91 | Paula Froehlich | 52 | Mother-in-law | — | Germany |
| 92 | Laura Froehlich | 14 | Step-daughter | — | Maryland |
| 93 | Patrick Johnston | 44 | Head | Manufacturer | Free State Ireland |
| 94 | Irene M. Johnston | 38 | Wife | — | Canada English |
| 95 | Herbert M. Johnston | 20 | Son | Mechanic | Canada English |
| 96 | Margaret M. Johnston THIS PERSON | 19 | Daughter | Bookkeeper | Canada English |
| 97 | Stella Johnston | 18 | Daughter | Designer | Canada English |
| 98 | Allen J. Johnston | 15 | Son | — | Canada English |
| 99 | Gerald M. Johnston | 13 | Son | — | Canada English |
| 100 | Lucy Johnston | 7 | Daughter | — | Canada English |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)