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Joseph Costa — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Contra-Costa-County, California
Our Model Tree links this Joseph Costa across the 1920, 1930 and 1940 US Censuses in Contra-Costa-County, California (XGBoost, ~Confirmed) — first a head (b.~1894), then head of a 4-person household.
Age 46
b. ~1894
Male
Head
Born: Azores
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Contra-Costa-County, California |
| Surname | Costa |
| Given Name | Joseph J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Azores |
| 1935 Residence (City) | Township 5 |
| 1935 Residence (County) | Contra Costa |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Boiler Maker |
| Industry | Oil Refinery |
| Class of Worker | PW |
| Hours Worked | 56 |
| Income (1939) | 1630 |
| Highest Grade | H 2 |
| 1935 Residence | Same house |
| Birth Country | Portugal |
| Birthplace (normalized) | azores |
| Occupation | Boiler Maker |
| Township / Ward | Township 5 |
| Est. Birth Year | ~1894 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Joseph | Age | Birth yr |
|---|---|---|---|---|
| Francis Costa | Spouse | — | 33 | ~1907 |
| William Costa | Son | — | 10 | ~1930 |
| Marie Costa | Daughter | — | 14 | ~1926 |
| Joseph Costa | Head | — | 46 | ~1894 |
Census Appearances
1920
Bristol, Massachusetts
Head, age 24
Bristol, Massachusetts · implied b. ~1896 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Costa |
| Given Name | Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Azores |
| Year of Immigration | 1912 |
| Naturalization Status | Alien |
| Father's Birthplace | Azores |
| Mother's Birthplace | Azores |
| Occupation | Machinist |
| Industry | Drill Factory |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Portuguese |
| Home Owned/Rented | R |
| Birth Country | Portugal |
| Birthplace (normalized) | azores |
1930
Alameda, California
Head, age 35
Alameda, California · implied b. ~1895 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Costa |
| Given Name | Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Azores |
| Naturalization Status | Naturalized |
| Year of Immigration | 1912 |
| Age at First Marriage | 21 |
| Father's Birthplace | Azores |
| Mother's Birthplace | Azores |
| Occupation | Machinist |
| Industry | Auto Factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Portuguese |
| Home Owned/Rented | R |
| Home Value / Rent | 25 |
| Birth Country | Portugal |
| Birthplace (normalized) | azores |
1940
Contra-Costa-County, California
Head, age 46
Contra-Costa-County, California · implied b. ~1894 — 4 household members
| Surname | Costa |
| Given Name | Joseph J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Azores |
| 1935 Residence (City) | Township 5 |
| 1935 Residence (County) | Contra Costa |
| Naturalization Status | Naturalized |
| Occupation | Boiler Maker |
| Industry | Oil Refinery |
| Class of Worker | PW |
| Hours Worked | 56 |
| Income (1939) | 1630 |
| Highest Grade | H 2 |
| 1935 Residence | Same house |
| Birth Country | Portugal |
| Birthplace (normalized) | azores |
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 Costa across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage.
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This person
Anchor record
Joseph Costa
Head · 1940 · age 46 · b. ~1894 · 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
40 people indexed on this census page (nara:1940:m-t0627-00195-00737)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Richard S. Hawkins | 57 | Head | Mechanic | England |
| 42 | Mabel O. Hawkins | 53 | Wife | — | Indiana |
| 43 | Frank E. Enos | 52 | Head | Pipe Fitter | California |
| 44 | Rose V. Enos | 34 | Wife | — | California |
| 45 | Robert F. Enos | 12 | Son | — | California |
| 46 | Lois A. Enos | 9 | Daughter | — | California |
| 47 | Joseph J. Costa THIS PERSON | 46 | Head | Boiler Maker | Azores |
| 48 | Francis R. Costa | 33 | Wife | — | California |
| 49 | Marie M. Costa | 14 | Daughter | — | California |
| 50 | William A. Costa | 10 | Son | — | California |
| 51 | Joseph L. Whiteside | 37 | Head | Pipe Fitter | California |
| 52 | May A. Whiteside | 35 | Wife | — | California |
| 53 | Harold J. Whiteside | 15 | Son | — | California |
| 54 | Florence S. Whiteside | 14 | Daughter | — | California |
| 55 | Malcolm R. Fowler | 25 | Head | Teller | Ontario |
| 56 | Verna O. Fowler | 23 | Wife | — | California |
| 57 | Carolyn Fowler | 3 | Daughter | — | California |
| 58 | Armand R. Higgins | 49 | Head | Watchman | California |
| 59 | Laura M. Higgins | 42 | Wife | Clerk | Arizona |
| 60 | Harold J. Higgins | 22 | Son | — | California |
| 61 | Clifford A. Merkel | 31 | Head | Technical Engineer | California |
| 62 | Mary E. Merkel | 29 | Wife | — | Ireland |
| 63 | Jean M. Merkel | 3 | Daughter | — | California |
| 64 | Fred J. Frach | 35 | Head | Machinist | England |
| 65 | Evelyn Frach | 31 | Wife | — | Austria|Hungary |
| 66 | Emil J. Frach | 3 | Son | — | California |
| 67 | Paul W. Williams | 46 | Head | Maple Mechanic | Tennessee |
| 68 | Laura O. Williams | 36 | Wife | — | Colorado |
| 69 | Abraham Karl F. Williams | 15 | Son | — | Oregon |
| 70 | William H. Hill | 53 | Head | Marine Engineer | California |
| 71 | Sarah M. Hill | 44 | Wife | — | Missouri |
| 72 | George C. Hill | 18 | Son | — | California |
| 73 | Clyde A. Miller | 49 | Head | Machinist | Ohio |
| 74 | Viola Miller | 51 | Wife | — | Illinois |
| 75 | Bronson C. Miller | 24 | Son | Laboratory Clerk | California |
| 76 | Maxine Miller | 14 | Daughter | — | California |
| 77 | Vincent A. Miller | 11 | Son | — | California |
| 78 | Guy L. Berry | 51 | Head | Teacher | Iowa |
| 79 | Lillian N. Berry | 45 | Wife | — | Iowa |
| 80 | Bruce F. Berry | 24 | Son | Teller | Iowa |
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)