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John Mccarthy — 1930 US Census Record
Model Tree available1930 United States Federal Census · San Francisco, California
Our Model Tree links this John Mccarthy across the 1910, 1920 and 1930 US Censuses in San Francisco, California (XGBoost, ~Confirmed), with identified parents Cornelius & Jerry — first a son (b.~1907), then head of a 6-person household.
Age 23
b. ~1907
Male
Son
Born: California
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | San Francisco, California |
| Surname | McCarthy |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Occupation | Laborer |
| Industry | General |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Laborer |
| Township / Ward | San Francisco City |
| Est. Birth Year | ~1907 |
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.
6 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Catherine Mccarthy | Daughter | — | 15 | ~1915 |
| Jerry Mccarthy | Head | — | 58 | ~1872 |
| William Mccarthy | Son | — | 20 | ~1910 |
| John Mccarthy | Son | — | 23 | ~1907 |
| Timothy Mccarthy | Son | — | 18 | ~1912 |
| Elizabeth Mccarthy | Spouse | — | 53 | ~1877 |
Census Appearances
Son, age 1
San Francisco, California · implied b. ~1909 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCarty |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1920
San Francisco, …
Son, age 12
San Francisco, California · implied b. ~1908 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCarthy |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
San Francisco, …
Son, age 23
San Francisco, California · implied b. ~1907 — 6 household members
| Surname | McCarthy |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Laborer |
| Industry | General |
| Class of Worker | W |
| Can Read/Write | Yes |
| 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 John Mccarthy across 3 US Census years (1910, 1920 and 1930) in San Francisco, California, using XGBoost record linkage. Identified parents: father Cornelius Mccarthy (~0.92 confidence) and father Jerry Mccarthy (~0.92 confidence) and mother Elizabeth Mccarthy (~0.92 confidence) and father Jeremiah Mccarty (~0.92 confidence) and mother Elizabeth Mccarty (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Cornelius Mccarthy
b. ~1870
Source father
● Household
· direct · ~0.92
Father
Jerry Mccarthy
b. ~1872
Source father
● Household
· direct · ~0.92
Mother
Elizabeth Mccarthy
b. ~1877
Source mother
● Household
· direct · ~0.92
Father
Jeremiah Mccarty
b. ~1882
Source father
● Household
· direct · ~0.92
Mother
Elizabeth Mccarty
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Mccarthy
Son · 1930 · age 23 · b. ~1907 · California
★ You are viewing this record
Sibling
William Mccarthy
Sibling · 1930 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Mccarthy
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Timothy Mccarthy
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
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
38 people indexed on this census page (ia:1930:californiacensus00reel198:0164)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Henry Rohmer | 41 | Head | Lamp Fitter | California |
| 2 | Annie Rohmer | 34 | Wife | None | California |
| 3 | Danielle Rohmer | 12 | Daughter | — | California |
| 4 | Lucille Rohmer | 6 | Daughter | — | California |
| 5 | Fred Lindenberger | 60 | Head | Owner | Michigan |
| 6 | Frank Dunnell | 65 | Head | Owner | Italy |
| 7 | Antoinette Dunnell | 50 | Wife-H | None | New York |
| 8 | Virginia Dunnell | 25 | Daughter | — | California |
| 9 | Salvador Dunnell | 19 | Son | — | California |
| 10 | Charles Molinari | 31 | Head | Butcher | Italy |
| 11 | Mary Molinari | 25 | Wife | None | Italy |
| 12 | William Molinari | 2 | Son | Butcher | California |
| 13 | Mary Molinari | 2 | Daughter | — | California |
| 22 | Jerry Mccarthy | 58 | Head | Laborer | Irish Free State |
| 23 | Elizabeth Mccarthy | 53 | Wife | None | Irish Free State |
| 24 | John Mccarthy THIS PERSON | 23 | Son | Laborer | California |
| 25 | William Mccarthy | 20 | Son | Laborer | California |
| 26 | Timothy Mccarthy | 18 | Son | — | California |
| 27 | Catherine Mccarthy | 15 | Daughter | — | California |
| 31 | William Goodenough | 50 | Head | Clerk | Iowa |
| 32 | Lola Goodenough | 53 | Wife | Seamstress | Michigan |
| 33 | Robert Ginn | 31 | Head | Bookkeeper | California |
| 34 | Alice Ginn | 28 | Wife | — | California |
| 35 | Robert Ginn | 10 | Son | — | California |
| 36 | William Ginn | 3 | Son | — | California |
| 37 | James Stamos | 35 | Head | Waiter | Greece |
| 38 | Mary Stamos | 31 | Wife | — | Colorado |
| 39 | Sophia Stamos | 5 | Daughter | — | California |
| 40 | Geo. E. Nicolas | 41 | Head | Clerk | California |
| 41 | Annie Nicolas | 43 | Wife | — | California |
| 42 | Patricia Nicolas | 14 | Daughter | — | California |
| 43 | John Nicolas | 12 | Son | — | California |
| 44 | Evelyn Nicolas | 6 | Daughter | — | California |
| 45 | Leo Laveau | 42 | Head | Carpenter | Massachusetts |
| 46 | Rose Laveau | 33 | Wife | — | California |
| 47 | Leo Laveau | 7 | Son | — | California |
| 48 | Margaret Laveau | 56 | Head | Appraiser | California |
| 49 | Joseph Laveau | 55 | Brother | Chauffeur | California |
Related Census Records
Pedigree Summary
John + 3 siblings
Gen 1 · 5 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)