JC
Joseph Costa — 1900 US Census Record
Linked across censuses1900 United States Federal Census · Alameda, California
Our Model Tree links this Joseph Costa across the 1900, 1910, 1920 and 1930 US Censuses in Alameda, California (XGBoost, ~Confirmed) — first a head (b.~1874), then head of a 4-person household.
Age 26
b. ~1874
Male
Head
Born: Portugal
Married
1900 Census Record Details
| Census Year | 1900 |
| Location | Alameda, California |
| Surname | Costa |
| Given Name | Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Portugal |
| Birth Month | Mar |
| Birth Year | 1874 |
| Year of Immigration | 1888 |
| Naturalization Status | Alien |
| Father's Birthplace | Portugal |
| Mother's Birthplace | Portugal |
| Additional Details | |
| Occupation | Farmer |
| Can Read | No |
| Can Write | No |
| Speaks English | No |
| Birth Country | Portugal |
| Birthplace (normalized) | portugal |
| Occupation | Farmer |
| Township / Ward | Alameda |
| Est. Birth Year | ~1874 |
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 1900 census.
| Name | Relation to head | Relative to Joseph | Age | Birth yr |
|---|---|---|---|---|
| Mary Costa | Daughter | — | 4 | ~1896 |
| Anthony Costa | Son | — | 1 | ~1899 |
| Joseph Costa | Head | — | 26 | ~1874 |
| Mary Costa | Spouse | — | 24 | ~1876 |
Census Appearances
1900
Alameda, California
Head, age 26
Alameda, California · implied b. ~1874 — 4 household members
| Surname | Costa |
| Given Name | Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Portugal |
| Birth Month | Mar |
| Birth Year | 1874 |
| Year of Immigration | 1888 |
| Naturalization Status | Alien |
| Father's Birthplace | Portugal |
| Mother's Birthplace | Portugal |
| Occupation | Farmer |
| Can Read | No |
| Can Write | No |
| Speaks English | No |
| Birth Country | Portugal |
| Birthplace (normalized) | portugal |
1910
Alameda, California
Head, age 37
Alameda, California · implied b. ~1873 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Costa |
| Given Name | Joe |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Portugal |
| Years Married | 17 |
| Year of Immigration | 1888 |
| Naturalization Status | Alien |
| Father's Birthplace | Portugal |
| Mother's Birthplace | Portugal |
| Occupation | Farmer |
| Industry | Genl farm |
| Birth Country | Portugal |
| Birthplace (normalized) | portugal |
1920
Kings, California
Head, age 48
Kings, California · implied b. ~1872 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Costa |
| Given Name | Joe S. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Portugal |
| Year of Immigration | 1890 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Portugal |
| Mother's Birthplace | Portugal |
| Occupation | Farmer |
| Industry | Dairy Farm |
| Class of Worker | OA |
| Can Read | No |
| Can Write | No |
| Speaks English | Yes |
| Mother Tongue | Portuguese |
| Home Owned/Rented | R |
| Birth Country | Portugal |
| Year of Naturalization | 1894 |
| Birthplace (normalized) | portugal |
1930
Kings, California
Other, age 59
Kings, California · implied b. ~1871 — 50 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Costa |
| Given Name | Joe S Jr |
| Relationship to Head | O |
| Sex | M |
| Color / Race | White |
| Age | 59 |
| Marital Status | Married |
| Birthplace | Portugal |
| Naturalization Status | Naturalized |
| Year of Immigration | 1890 |
| Age at First Marriage | 28 |
| Father's Birthplace | Portugal |
| Mother's Birthplace | Portugal |
| Occupation | farmer |
| Industry | gen farm |
| Class of Worker | O |
| Can Read/Write | Yes |
| Mother Tongue | Portuguese |
| Birth Country | Portugal |
| Birthplace (normalized) | portugal |
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 4 US Census years (1900, 1910, 1920 and 1930) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Joseph Costa
Head · 1900 · age 26 · b. ~1874 · California
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1900 US Federal Census — Alameda, California
Open full size
1900 US Federal Census — Alameda, California
Page Contents
50 people indexed on this census page (ia:1900:12thcensusofpopu0081unit:0028)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Antonio S. Lemos | 19 | Brother | Farm Laborer | Portugal |
| 2 | Francisco Lemos | None | Mother | — | Portugal |
| 3 | Mary Lemos | None | Sister | — | Portugal |
| 4 | Malina Lemos | None | Sister | — | Portugal |
| 5 | Gusta Costa | None | Sister | — | Portugal |
| 6 | Benajah L. Burdick | 74 | Head | Landlord | Vermont |
| 7 | Wm. E. Hemler | 57 | Head | Farmer | Illinois |
| 8 | Nannie Hemler | 49 | Wife | — | Alabama |
| 9 | Hattie M. Hemler | 24 | Daughter | School Teacher | Texas |
| 10 | Fred Vanderhoof | 6 | Boarder | — | California |
| 11 | John B. Dillum | 44 | Head | Farmer | New York |
| 12 | Sarah Dillum | 42 | Wife | — | Australia |
| 13 | Edward Dillum | 21 | Son | At School | California |
| 14 | Joseph G. Silva | 67 | Head | Farmer | Portugal |
| 15 | Mary Silva | 45 | Wife | — | Portugal |
| 16 | Joseph Silva | 18 | Son | Farm Laborer | California |
| 17 | Joseph Vargas | None | Servant | Farm Laborer | Portugal |
| 18 | Joseph Mello | None | Servant | Farm Laborer | Portugal |
| 19 | Amos Mccartney | 72 | Head | Landlord | Pennsylvania |
| 20 | Sally Mccartney | 52 | Wife | — | Pennsylvania |
| 21 | Pearl Mccartney | 26 | Daughter | — | California |
| 22 | Meda Mccartney | 24 | Daughter | — | California |
| 23 | Myrtle Mccartney | 22 | Daughter | — | California |
| 24 | Milton Mccartney | 22 | Daughter | — | California |
| 25 | Lulu Mccartney | 12 | Daughter | At School | California |
| 26 | Yee Goon | 39 | Servant | Cook | China |
| 27 | Fong Hong | 32 | Servant | Cook | China |
| 28 | Nels Johnson | 31 | Servant | Gardener | Sweden |
| 29 | Frank B. Cebra | 40 | Head | Farmer | Portugal |
| 30 | Joseph Costa THIS PERSON | 26 | Head | Farmer | Portugal |
| 31 | Mary Costa | 24 | Wife | — | Portugal |
| 32 | Mary Costa | 4 | Daughter | — | California |
| 33 | Anthony Costa | 1 | Son | — | California |
| 34 | Sarah H. Swett | 52 | Head | Farmer | Wisconsin |
| 35 | Daniel Swett | 18 | Son | Farm Laborer | California |
| 36 | William R. Baron | 24 | Son-in-law | Dentist | California |
| 37 | Lucy S. Baron | 24 | Daughter | — | California |
| 38 | Ronald Macdonald | None | Head | Landlord | Alabama |
| 39 | Harriet Macdonald | None | Wife | — | Illinois |
| 40 | Josephine La Cruse | None | Servant | Domestic | Germany |
| 41 | Antonio Floris | 56 | Head | Farmer | Portugal |
| 42 | Lizzie Floris | 44 | Wife | — | California |
| 43 | Manual Floris | 25 | Son | Farm Laborer | California |
| 44 | Mary Floris | 26 | Daughter | — | California |
| 45 | Antonio Floris | 22 | Son | Farm Laborer | California |
| 46 | Frank Floris | 21 | Son | Farm Laborer | California |
| 47 | Louisa Floris | 18 | Daughter | — | California |
| 48 | Joseph Floris | 16 | Son | Farm Laborer | California |
| 49 | Henry Floris | 12 | Son | At School | California |
| 50 | Minnie Floris | 11 | Daughter | At School | California |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1900 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)