JF
Joseph Foster — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Alameda-County, California
Our Model Tree links this Joseph Foster across the 1920, 1930 and 1940 US Censuses in Alameda-County, California (XGBoost, ~Confirmed) — first a head (b.~1877), then head of a 3-person household.
Age 63
b. ~1877
Male
Head
Born: California
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Alameda-County, California |
| Surname | Foster |
| Given Name | Joseph S. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 63 |
| Marital Status | Married |
| Birthplace | California |
| 1935 Residence (City) | San Leandro city |
| 1935 Residence (County) | Alameda |
| Additional Details | |
| Highest Grade | C 6 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | San Leandro City |
| Est. Birth Year | ~1877 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Joseph | Age | Birth yr |
|---|---|---|---|---|
| Elizabeth Foster | Daughter | — | 34 | ~1906 |
| Joseph Foster | Head | — | 63 | ~1877 |
| Mary Foster | Spouse | — | 58 | ~1882 |
Census Appearances
1920
Alameda, California
Head, age 43
Alameda, California · implied b. ~1877 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Foster |
| Given Name | Joe |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | California |
| Father's Birthplace | Azores |
| Mother's Birthplace | Azores |
| Occupation | Farmer |
| Industry | General farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
Alameda, California
Head, age 53
Alameda, California · implied b. ~1877 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Foster |
| Given Name | Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | California |
| Age at First Marriage | 27 |
| Father's Birthplace | Azores |
| Mother's Birthplace | Azores |
| Occupation | Laborer |
| Industry | Motor Co. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 5000 |
| Radio Set | R |
| Veteran | No |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Alameda-County, California
Head, age 63
Alameda-County, California · implied b. ~1877 — 3 household members
| Surname | Foster |
| Given Name | Joseph S. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 63 |
| Marital Status | Married |
| Birthplace | California |
| 1935 Residence (City) | San Leandro city |
| 1935 Residence (County) | Alameda |
| Highest Grade | C 6 |
| 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 Joseph Foster across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Joseph Foster
Head · 1940 · age 63 · b. ~1877 · California
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Alameda-County, California
Open full size
1940 US Federal Census — Alameda-County, California
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-00184-00349)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Jack Garcia | 36 | Head | Teamster | California |
| 2 | Theresa Garcia | 30 | Wife | — | California |
| 3 | Douglas Garcia | 4 | Son | — | California |
| 4 | Shirley Martin | 39 | Head | Assistant Manager | California |
| 5 | Ida Martin | 37 | Wife | — | Nebraska |
| 6 | Shirley Martin | 18 | Daughter | — | California |
| 7 | Wiley Martin | 15 | Son | — | California |
| 8 | Herb Martin | 1 | Son | — | California |
| 9 | Dorsey Gentle | 42 | Head | Switchman | Iowa |
| 10 | Mary Gentle | 35 | Wife | — | Idaho |
| 11 | Patricia Gentle | 7 | Daughter | — | California |
| 12 | Elizabeth Gentle | 84 | Mother | — | Indiana |
| 13 | Waldemar Voigt | 46 | Head | Ice Cream Maker | California |
| 14 | Marion F. Voigt | 46 | Wife | — | California |
| 15 | Robert A. Voigt | 22 | Son | Apprentice Compressor | California |
| 16 | Dale Voigt | 20 | Son | Assistant Manager | California |
| 17 | Jane Voigt | 19 | Daughter | — | California |
| 18 | Dorothy Voigt | 18 | Daughter | — | California |
| 19 | Marion Voigt | 15 | Daughter | — | California |
| 21 | Charles D. Davidson | 43 | Head | Benchman | Scotland |
| 22 | Bridie Davidson | 44 | Wife | Proprietor Manager | Ireland |
| 23 | John D. Davidson | 13 | Son | — | California |
| 24 | Walter A. Traub | 49 | Head | Foreman | Pennsylvania |
| 25 | Lucy C. Traub | 46 | Wife | — | Ohio |
| 26 | John R. Traub | 25 | Son | Cashier | Ohio |
| 27 | Roy J. Clemens | 41 | Head | Proprietor | California |
| 28 | Thea K. Clemens | 41 | Wife | — | Denmark |
| 29 | Joseph S. Foster THIS PERSON | 63 | Head | — | California |
| 30 | Mary L. Foster | 58 | Wife | Teacher Of Music | New York |
| 31 | Elizabeth Foster | 34 | Daughter | — | New York |
| 32 | Will E. Wise | 41 | Head | Accountant | Illinois |
| 33 | Mabel E. Wise | 35 | Wife | Underwriter | Nebraska |
| 35 | Manuel Costa | 26 | Head | Chipper | Portugal |
| 36 | Mary Costa | 22 | Wife | — | Portugal |
| 37 | Manuel Jr. Costa | 0 | Son | — | California |
| 38 | Harold H. Harris | 48 | Head | Salesman | Minnesota |
| 39 | Adrienne Harris | 43 | Wife | — | Michigan |
| 40 | Bruce Harris | 16 | Son | Delivery Boy | Oregon |
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)