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John Mccormack — 1940 US Census Record
Model Tree available1940 United States Federal Census · San-Francisco-County, California
Our Model Tree links this John Mccormack across the 1920, 1930 and 1940 US Censuses in San-Francisco-County, California (XGBoost, ~Confirmed), with identified parents John & Anna — first a head (b.~1902), then head of a 4-person household.
Age 38
b. ~1902
Male
Head
Born: California
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Francisco-County, California |
| Surname | McCormack |
| Given Name | John B. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | California |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Additional Details | |
| Occupation | Conductor |
| Industry | Public Railway |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1875 |
| Highest Grade | H-2 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Conductor |
| Township / Ward | San Francisco |
| Est. Birth Year | ~1902 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| John Mccormack | Head | — | 38 | ~1902 |
| Palmeda Mccormack | Daughter | — | 6 | ~1934 |
| Mary Mccormack | Spouse | — | 38 | ~1902 |
| Oliver Mccormack | Son | — | 13 | ~1927 |
Census Appearances
1920
San Francisco, …
Son, age 18
San Francisco, California · implied b. ~1902 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCormack |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Occupation | Messenger |
| Industry | Red Cross |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
Son, age 28
San Francisco, California · implied b. ~1902 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCormick |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Occupation | Clerk |
| Industry | Bank |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
San-Francisco-County, California
Head, age 38
San-Francisco-County, California · implied b. ~1902 — 4 household members
| Surname | McCormack |
| Given Name | John B. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | California |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Occupation | Conductor |
| Industry | Public Railway |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1875 |
| Highest Grade | H-2 |
| 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 John Mccormack across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Mccormack (~0.92 confidence) and mother Anna Mccormick (~0.92 confidence) and mother Annie Mccormack (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Mccormack
b. ~1875
Source father
● Household
· direct · ~0.92
Mother
Anna Mccormick
b. ~1875
Source mother
● Household
· direct · ~0.92
Mother
Annie Mccormack
b. ~1876
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Mccormack
Head · 1940 · age 38 · b. ~1902 · 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 — San-Francisco-County, California
Open full size
1940 US Federal Census — San-Francisco-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00321-00548)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charles B. Lucchesi | 23 | Head | Office Boy | California |
| 2 | Maxine E. Lucchesi | 23 | Wife | — | Wisconsin |
| 3 | Bertha N. Banz | 48 | Mother-in-law | — | Minnesota |
| 4 | George S. Kelly | 49 | Head | Bottler In Brewery | California |
| 5 | Ella H. Kelly | 46 | Wife | — | California |
| 6 | Raymond C. Kelly | 14 | Son | — | California |
| 7 | John B. Mccormack THIS PERSON | 38 | Head | Conductor | California |
| 8 | Mary E. Mccormack | 38 | Wife | — | California |
| 9 | Oliver H. Mccormack | 13 | Son | — | California |
| 10 | Palmeda D. Mccormack | 6 | Daughter | — | California |
| 11 | Harold F. Maduro | 35 | Head | Hospital Attendant | Jamaica |
| 12 | Bertha D. Maduro | 40 | Wife | Practical Nurse | Kentucky |
| 13 | Theophile G. Lacoste | 34 | Head | Tank Truck Salesman | California |
| 14 | Hazel L. Lacoste | 33 | Wife | — | California |
| 15 | Jean T. Lacoste | 9 | Son | — | California |
| 16 | James S. Kee | 61 | Head | Maintenance Man | California |
| 17 | Mary E. Kee | 56 | Wife | — | Pennsylvania |
| 18 | Robert E. Kee | 23 | Son | Delivery Truck Driver | California |
| 19 | Anna Dayball | 68 | Lodger | — | Germany |
| 20 | George R. Pellissier | 49 | Head | Traveling Salesman | Illinois |
| 21 | Mathilde J. Pellissier | 44 | Wife | Private Detective | California |
| 22 | George A. Pellissier | 12 | Son | — | California |
| 23 | Johanna Pospich | 73 | Mother-in-law | — | Georgia |
| 24 | John J. Manning | 41 | Head | Locomotive Fireman | Tennessee |
| 25 | Beatrice Manning | 41 | Wife | Sales Lady | Texas |
| 26 | John J. Jr. Manning | 10 | Son | — | California |
| 27 | James M. Hart | 73 | Father-in-law | — | Texas |
| 28 | Carl E. Mcculloch | 20 | Step son | — | Oklahoma |
| 29 | Elizabeth Kratt | 59 | Head | — | New York |
| 30 | Benjamin H. Gane | 24 | Lodger | Payroll Clerk | Pennsylvania |
| 31 | John J. Sheehan | 58 | Head | Fire Man | Irish Free State |
| 32 | Mary J. Sheehan | 50 | Wife | — | Irish Free State |
| 33 | Donald V. Cowan | 30 | Head | Salesman Collector | Colorado |
| 34 | Ruth K. Cowan | 30 | Wife | Secretary | Canada-English |
| 35 | Eugene B. Cowan | 21 | Brother | Usher | Colorado |
| 36 | Thelma Cowan | 20 | Sister-in-law | — | Missouri |
| 37 | William M. Cowan | 60 | Father | — | Colorado |
| 38 | Ervin E. Scharff | 47 | Head | Insurance Broker | California |
| 39 | Gertrude G. Scharff | 45 | Wife | — | California |
| 40 | David P. Scharff | 17 | Son | Sales Clerk And Stock Boy | California |
Related Census Records
Pedigree Summary
John
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
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)