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John Stark — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Contra-Costa-County, California
Our Model Tree links this John Stark across the 1930 and 1940 US Censuses in Contra-Costa-County, California (XGBoost, ~Confirmed) — first a head (b.~1885), then head of a 9-person household.
Age 55
b. ~1885
Male
Head
Born: Yugoslavia
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Contra-Costa-County, California |
| Surname | Stark |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Yugoslavia |
| 1935 Residence (City) | Richmond |
| 1935 Residence (County) | Contra Costa |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Pipe fitter |
| Industry | Petroleum Refing |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2040 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Yugoslavia |
| Birthplace (normalized) | yugoslavia |
| Occupation | Pipe Fitter |
| Township / Ward | Richmond |
| Est. Birth Year | ~1885 |
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 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Katherine Stark | Daughter | — | 27 | ~1913 |
| Rudolph Stark | Son | — | 18 | ~1922 |
| Anna Stark | Spouse | — | 51 | ~1889 |
| Virginia Stark | Daughter | — | 10 | ~1930 |
| Peter Stark | Son | — | 15 | ~1925 |
| John Stark | Head | — | 55 | ~1885 |
| Stephanie Stark | Daughter | — | 20 | ~1920 |
| John Stark | Son | — | 23 | ~1917 |
| William Stark | Son | — | 13 | ~1927 |
Census Appearances
1930
Contra Costa, …
Head, age 45
Contra Costa, California · implied b. ~1885 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Stark |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Yugoslavia |
| Naturalization Status | Naturalized |
| Year of Immigration | 1903 |
| Age at First Marriage | 24 |
| Father's Birthplace | Yugoslavia |
| Mother's Birthplace | Yugoslavia |
| Occupation | Stillman Helper |
| Industry | Oil Refinery |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Austrian |
| Home Owned/Rented | O |
| Home Value / Rent | 5,000 |
| Radio Set | R |
| Veteran | No |
| Birth Country | Yugoslavia |
| Birthplace (normalized) | yugoslavia |
1940
Contra-Costa-County, California
Head, age 55
Contra-Costa-County, California · implied b. ~1885 — 9 household members
| Surname | Stark |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Yugoslavia |
| 1935 Residence (City) | Richmond |
| 1935 Residence (County) | Contra Costa |
| Naturalization Status | Naturalized |
| Occupation | Pipe fitter |
| Industry | Petroleum Refing |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2040 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Yugoslavia |
| Birthplace (normalized) | yugoslavia |
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 Stark across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Stark
Head · 1940 · age 55 · b. ~1885 · California
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Contra-Costa-County, California
Open full size
1940 US Federal Census — Contra-Costa-County, California
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00198-00082)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Thomas Deck | 9 | Lodg | — | California |
| 42 | Henry Francis | 37 | Head | Chemist | Wisconsin |
| 43 | Ethel D Francis | 34 | Wife | — | California |
| 44 | Joanne Francis | 8 | Daughter | — | California |
| 45 | John Stark THIS PERSON | 55 | Head | Pipe Fitter | Yugoslavia |
| 46 | Anna Stark | 51 | Wife | — | Yugoslavia |
| 47 | Katherine Stark | 27 | Daughter | Retail Clerk | Colorado |
| 48 | John W Stark | 23 | Son | Operator Pumping Plant | California |
| 49 | Stephanie Stark | 20 | Daughter | Retail Clerk | California |
| 50 | Rudolph Stark | 18 | Son | — | California |
| 51 | Peter Stark | 15 | Son | — | California |
| 52 | William Stark | 13 | Son | — | California |
| 53 | Virginia Stark | 10 | Daughter | — | California |
| 54 | Harry Busby | 47 | Head | Guard | Utah |
| 55 | Laura Busby | 43 | Wife | — | Washington |
| 56 | Donald Busby | 20 | Son | Asst. Cashier | Utah |
| 57 | Martin Busby | 16 | Son | — | California |
| 58 | Phyllis Busby | 13 | Daughter | — | California |
| 59 | John L Smith | 44 | Head | Boilermaker Foreman | California |
| 60 | Ada H Smith | 41 | Wife | — | California |
| 61 | John L Jr Smith | 21 | Son | Tel Operator | California |
| 62 | Allen P Smith | 19 | Son | Chauffeur | California |
| 63 | Gloria A Smith | 19 | Daughter | Cashier | California |
| 64 | William A Smith | 11 | Son | — | California |
| 65 | Loren J Smith | 8 | Son | — | California |
| 66 | Dean A Smith | 6 | Son | — | California |
| 67 | Richard G Smith | 2 | Son | — | California |
| 68 | Francis Smith | 1 | Son | — | California |
| 70 | Alfred Churchill | 38 | Head | Marine Engineer | Washington |
| 71 | Maud Churchill | 35 | Wife | — | Washington |
| 72 | Doris Churchill | 16 | Daughter | — | Washington |
| 73 | Edward Williams | 14 | Boarder | — | Washington |
| 74 | Paul Montz | 33 | Head | Deck Hand | Florida |
| 75 | Elvera Montz | 31 | Wife | — | Florida |
| 76 | Wilma Montz | 10 | Daughter | — | Florida |
| 77 | Margaret Montz | 6 | Daughter | — | Florida |
| 78 | James Wilson | 56 | Head | Water Tender | New York |
| 79 | Jessie Wilson | 58 | Wife | — | France |
| 80 | James L Wilson | 15 | Son | — | California |
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)