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Mary Larson — 1930 US Census Record
Linked across censuses1930 United States Federal Census · San Joaquin, California
Our Model Tree links this Mary Larson across the 1930 and 1940 US Censuses in San Joaquin, California (XGBoost, ~Confirmed) — first a daughter (b.~1916), then head of a 9-person household.
Age 14
b. ~1916
Female
Daughter
Born: California
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | San Joaquin, California |
| Surname | Larson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Illinois |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | Ripon Township |
| Est. Birth Year | ~1916 |
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.
9 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Bertha Larson | Daughter | — | 9 | ~1921 |
| Elsie Larson | Daughter | — | 17 | ~1913 |
| Mary Larson | Daughter | — | 14 | ~1916 |
| Leona Larson | Daughter | — | 19 | ~1911 |
| Clara Larson | Daughter | — | 1 | ~1929 |
| George Larson | Head | — | 44 | ~1886 |
| Marlin Larson | Son | — | 5 | ~1925 |
| Emory Larson | Son | — | 10 | ~1920 |
| Alma Larson | Spouse | — | 45 | ~1885 |
Census Appearances
1930
San Joaquin, …
Daughter, age 14
San Joaquin, California · implied b. ~1916 — 9 household members
| Surname | Larson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
San-Joaquin-County, California
Daughter, age 23
San-Joaquin-County, California · implied b. ~1917 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larson |
| Given Name | Marjorie |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Tracy City |
| 1935 Residence (County) | San Joaquin |
| Class of Worker | 0 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| 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 Larson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Larson
Daughter · 1930 · age 14 · b. ~1916 · California
★ You are viewing this record
Sibling
Clara Larson
Sibling · 1930 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Emory Larson
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elsie Larson
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leona Larson
Sibling · 1930 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marlin Larson
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bertha Larson
Sibling · 1930 · age 9
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 — San Joaquin, California
Open full size
1930 US Federal Census — San Joaquin, California
Page Contents
50 people indexed on this census page (ia:1930:californiacensus00reel212:0798)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Mary Ellen Markham | 77 | Head | Hotel Manager | Kentucky |
| 52 | Thos Wm Markham | 68 | Brother | Manager | Kentucky |
| 53 | Edw J Nelson | 34 | Lodger | Dishwasher | Sweden |
| 54 | Frank G Trafton | 48 | Lodger | Veterinary | United States |
| 55 | Stella Hickson | 24 | Lodger | Labourer | California |
| 56 | John Madsen | 39 | Lodger | Labourer | Minnesota |
| 57 | George Larson | 44 | Head | Farmer | Iowa |
| 58 | Alma Larson | 45 | Wife | — | Illinois |
| 59 | Leona Larson | 19 | Daughter | — | California |
| 60 | Elsie Larson | 17 | Daughter | — | California |
| 61 | Mary Larson THIS PERSON | 14 | Daughter | — | California |
| 62 | Emory Larson | 10 | Son | — | California |
| 63 | Bertha Larson | 9 | Daughter | — | California |
| 64 | Marlin Larson | 5 | Son | — | California |
| 65 | Clara Larson | 1 | Daughter | — | California |
| 66 | Elizabeth Crowner | 47 | Head | — | Indiana |
| 67 | Harold Crowner | 20 | Son | Labourer | California |
| 68 | Ellen Crowner | 10 | Daughter | — | California |
| 69 | Wayne Van Slyke | 50 | Head | Farmer | New York |
| 70 | Gladys Van Slyke | 39 | Wife | — | California |
| 71 | Lois Van Slyke | 7 | Daughter | — | California |
| 72 | Audrey Van Slyke | 5 | Daughter | — | California |
| 73 | Harold Van Slyke | 1 | Son | — | California |
| 74 | James F Thomason | 31 | Head | Farmer | California |
| 75 | Adelia Thomason | 19 | Wife | — | California |
| 76 | Alfred Thomason | 2 | Son | — | California |
| 77 | Nellie Burns | 72 | Mother-in-law | — | California |
| 78 | John Enserink | 43 | Head | Farmer | Holland |
| 79 | Alice Enserink | 34 | Wife | — | Holland |
| 80 | Wilhelmina Enserink | 11 | Daughter | — | Holland |
| 81 | Jennie Enserink | 7 | Daughter | — | Canada |
| 82 | Alice Enserink | 5 | Daughter | — | California |
| 83 | Egbert Enserink | 2 | Son | — | California |
| 84 | Henrietta Enserink | 0 | Daughter | — | California |
| 85 | Fred Stammersjohann | 47 | Head | Farmer | Missouri |
| 86 | Lucille Stammersjohann | 45 | Wife | — | Kentucky |
| 87 | L N Van Moor | 44 | Head | Farmer | Holland |
| 88 | Agnes Van Moor | 40 | Wife | — | South Dakota |
| 89 | Marjory Tokens | 12 | Lodger | — | New York |
| 90 | Elizabeth Tokens | 6 | Lodger | — | California |
| 91 | John Beachler | 69 | Head | Farmer | Indiana |
| 92 | Minerva Beachler | 63 | Wife | — | Ohio |
| 93 | Clarence Frantz | 22 | Lodger | Labourer | Indiana |
| 94 | Luke Dick | 55 | Head | Farmer | Kentucky |
| 95 | Maude Dick | 38 | Wife | — | Montana |
| 96 | Barbara Dick | 15 | Daughter | — | Montana |
| 97 | Edward Dick | 12 | Son | — | Montana |
| 98 | Eugene Dick | 9 | Son | — | Montana |
| 99 | Richard Dick | 4 | Son | — | California |
| 100 | Frank L Colbert | 57 | Head | Carpenter | Ohio |
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)