JM
John Mccormick — 1940 US Census Record
Linked across censuses1940 United States Federal Census · San-Francisco-County, California
Our Model Tree links this John Mccormick across the 1920, 1930 and 1940 US Censuses in San-Francisco-County, California (XGBoost, ~Confirmed) — first a head (b.~1867), then head of a 3-person household.
Age 73
b. ~1867
Male
Head
Born: Maine
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Francisco-County, California |
| Surname | McCormick |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 73 |
| Marital Status | Married |
| Birthplace | Maine |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Additional Details | |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
| Township / Ward | San Francisco |
| Est. Birth Year | ~1867 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| John Mccormick | Head | — | 73 | ~1867 |
| Gilbert Mccormick | Son | — | 45 | ~1895 |
| Cecelia Mccormick | Spouse | — | 73 | ~1867 |
Census Appearances
1920
San Francisco, …
Head, age 54
San Francisco, California · implied b. ~1866 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCormick |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Maine |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Salesman |
| Industry | Paper Co. |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
1930
San Francisco, …
Head, age 63
San Francisco, California · implied b. ~1867 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCormick |
| Given Name | John F. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 63 |
| Marital Status | Married |
| Birthplace | Maine |
| Age at First Marriage | 26 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Occupation | Salesman |
| Industry | Hdw. Dept. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | $6000 |
| Radio Set | R |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
1940
San-Francisco-County, California
Head, age 73
San-Francisco-County, California · implied b. ~1867 — 3 household members
| Surname | McCormick |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 73 |
| Marital Status | Married |
| Birthplace | Maine |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
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 Mccormick across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Mccormick
Head · 1940 · age 73 · b. ~1867 · 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-t0627-00321-00219)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Sally Jane Arquette | 2 | Daughter | — | California |
| 42 | Gerald Pratt | 31 | Head | Salesman | California |
| 43 | Helen Pratt | 28 | Wife | — | California |
| 44 | Gerald Pratt | 5 | Son | — | California |
| 45 | Wesley Smith | 27 | Head | Proprietor | California |
| 46 | Juanita Smith | 24 | Wife | — | California |
| 47 | William Commack | 65 | Head | — | England |
| 48 | Jennie Commack | 65 | Wife | — | California |
| 49 | David Emanuel | 37 | Head | Tabulator | Roumania |
| 50 | Henrietta Emanuel | 30 | Wife | — | California |
| 51 | Arlene Emanuel | 2 | Daughter | — | California |
| 52 | Peter Hargadon | 77 | Head | — | Ireland |
| 53 | Annie Hargadon | 60 | Wife | — | Ireland |
| 54 | Carrie Mccarthy | 65 | Sister in law | — | Ireland |
| 55 | Mabel E. Sonne | 54 | Head | Stationary Engineer | California |
| 56 | Alexandra Sonne | 29 | Wife | — | China |
| 57 | Rodney Sonne | 8 | Son | — | California |
| 58 | John J. Mccormick THIS PERSON | 73 | Head | — | Maine |
| 59 | Cecelia M. Mccormick | 73 | Wife | — | Iowa |
| 60 | Gilbert Mccormick | 45 | Son | Truck Driver | California |
| 61 | Frank S. Hunter | 57 | Head | Engineer | California |
| 62 | Lottie E. Hunter | 54 | Wife | — | California |
| 63 | Rita Maas | 45 | Head | — | California |
| 64 | Herbert Maas | 25 | Son | Asst. Production Manager | California |
| 65 | Douglas Maas | 22 | Son | Manager | California |
| 66 | Gertrude Fisher | 44 | Sister | — | California |
| 67 | Harriet Small | 65 | Aunt | — | California |
| 68 | William Fisher | 63 | Brother | Machinist | Germany |
| 69 | Alexander Herney | 42 | Head | Stationary Engineer | Russia |
| 70 | Dora Herney | 36 | Wife | — | Egypt |
| 71 | Anthony Herney | 17 | Son | Errand Boy | California |
| 72 | Louisa Herney | 16 | Daughter | — | China |
| 73 | George Ralph | 67 | Head | Mortician | California |
| 74 | Kennetta Ralph | 37 | Daughter | — | California |
| 75 | Doris Ralph | 12 | Granddaughter | — | California |
| 76 | Alex Richter | 71 | Boarder | — | Michigan |
| 77 | Richard Wagner | 27 | Head | Driver | Minnesota |
| 78 | Camilla Wagner | 31 | Wife | Junior Clerk | California |
| 79 | Anna Signally | 61 | Head | — | Ohio |
| 80 | Richard Signally | 31 | Son | — | Illinois |
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)