OJ
Oscar Johnson — 1930 US Census Record
Model Tree available1930 United States Federal Census · San Francisco, California
Our Model Tree links this Oscar Johnson across the 1910, 1920 and 1930 US Censuses in San Francisco, California (XGBoost, ~Confirmed), with identified parents John & Mary — first a head (b.~1892), then head of a 5-person household.
Age 38
b. ~1892
Male
Head
Born: California
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | San Francisco, California |
| Surname | Johnson |
| Given Name | Oscar |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | California |
| Age at First Marriage | 24 |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Additional Details | |
| Occupation | Iron worker |
| Industry | Iron |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 3000 |
| Radio Set | R |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Iron Worker |
| Township / Ward | San Francisco City |
| Est. Birth Year | ~1892 |
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 1930 census.
| Name | Relation to head | Relative to Oscar | Age | Birth yr |
|---|---|---|---|---|
| Marie Johnson | Daughter | — | 6 | ~1924 |
| Oscar Johnson | Head | — | 38 | ~1892 |
| Charles Johnson | Son | — | 14 | ~1916 |
| Eugene Johnson | Son | — | 13 | ~1917 |
| Adeline Johnson | Spouse | — | 37 | ~1893 |
Census Appearances
1910
San Francisco, …
Son, age 18
San Francisco, California · implied b. ~1892 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Laborer |
| Industry | Farm |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1920
San Francisco, …
Head, age 27
San Francisco, California · implied b. ~1893 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Oscar |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | California |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Machinist |
| Industry | Machine Shop |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
San Francisco, …
Head, age 38
San Francisco, California · implied b. ~1892 — 5 household members
| Surname | Johnson |
| Given Name | Oscar |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | California |
| Age at First Marriage | 24 |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Occupation | Iron worker |
| Industry | Iron |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 3000 |
| Radio Set | R |
| 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 Oscar Johnson across 3 US Census years (1910, 1920 and 1930) in San Francisco, California, using XGBoost record linkage. Identified parents: father John Johnson (~0.92 confidence) and mother Mary Johnson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Johnson
b. ~1860
Source father
● Household
· direct · ~0.92
Mother
Mary Johnson
b. ~1865
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Oscar Johnson
Head · 1930 · age 38 · b. ~1892 · California
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — San Francisco, California
Open full size
1930 US Federal Census — San Francisco, California
Page Contents
41 people indexed on this census page (ia:1930:californiacensus00reel198:0428)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Jonathan Costley | 63 | Head | Carpenter | Alabama |
| 2 | Rebecca Costley | 58 | Wife | None | Australia |
| 3 | Edna Costley | 24 | Daughter | Dressmaker | Australia |
| 4 | Annetta Costley | 22 | Daughter | Stenographer | California |
| 5 | Miguel Sanchez | 45 | Head | Clerk | Peru |
| 6 | Albina Sanchez | 43 | Wife | None | Peru |
| 7 | Victoria Sanchez | 17 | Daughter | None | California |
| 8 | Mercedes Sanchez | 15 | Daughter | None | California |
| 9 | William Miller | 53 | Head | Mechanic | Germany |
| 10 | Belle Miller | 53 | Wife | None | California |
| 11 | George Anderson | 41 | Head | Conductor | Missouri |
| 12 | Gertrude Anderson | 33 | Wife | None | Norway |
| 13 | Irene L Anderson | 13 | Daughter | None | California |
| 14 | Thelma M Anderson | 12 | Daughter | None | California |
| 15 | Grace M Anderson | 4 | Daughter | None | California |
| 16 | Marie Svendson | 55 | Wife | None | Denmark |
| 19 | Victor E Cardona | 27 | Lodger | Clerk | Peru |
| 22 | Karl Esmeke | 35 | Head | Chauffeur | Pennsylvania |
| 23 | Louise Esmeke | 33 | Wife | Bookkeeper | California |
| 26 | Lenora E Walker | 39 | Head | Furrier | California |
| 27 | Nellie Walker | 39 | Boarder | Chambermaid | Texas |
| 29 | Ernest D Watkins | 30 | Head | Teamster | New York |
| 30 | Lorena M Watkins | 30 | Wife | None | California |
| 33 | Sid S Vickers | 26 | Head | Office Man | Minnesota |
| 34 | Mildred M Vickers | 27 | Wife | None | California |
| 35 | Evelyn J Vickers | 6 | Daughter | None | California |
| 36 | Eleanor J Vickers | 2 | Daughter | None | California |
| 37 | Frank H Walsh | 39 | Head | Bus Driver | Illinois |
| 38 | Anna Walsh | 36 | Wife | None | Illinois |
| 39 | Adam Poggetti | 43 | Head | Mechanic | Italy |
| 40 | Virginia Poggetti | 48 | Wife | None | Italy |
| 41 | Lena H B Poggetti | 19 | Daughter | Bookkeeper | California |
| 42 | Adeline Poggetti | 21 | Daughter | Stenographer | California |
| 43 | Oscar Johnson THIS PERSON | 38 | Head | Iron Worker | California |
| 44 | Adeline Johnson | 37 | Wife | None | California |
| 45 | Charles Johnson | 14 | Son | None | California |
| 46 | Eugene Johnson | 13 | Son | None | California |
| 47 | Marie Johnson | 6 | Daughter | None | California |
| 48 | Thomas O'Laughlin | 46 | Head | Motorman | California |
| 49 | Marie J O'Laughlin | 42 | Wife | None | California |
| 50 | Eleanor O'Laughlin | 15 | Daughter | None | California |
Pedigree Summary
Oscar
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
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)