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John Mccormack — 1940 US Census Record
Linked across censuses1940 United States Federal Census · New-Haven-County, Connecticut
Our Model Tree links this John Mccormack across the 1930 and 1940 US Censuses in New-Haven-County, Connecticut (XGBoost, ~Confirmed) — first a head (b.~1897), then head of a 9-person household.
Age 43
b. ~1897
Male
Head
Born: New York
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | New-Haven-County, Connecticut |
| Surname | McCormack |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | New Haven city |
| 1935 Residence (County) | New Haven |
| Additional Details | |
| Occupation | Policeman |
| Industry | City Police Dept |
| Class of Worker | GW |
| Hours Worked | 48 |
| Income (1939) | 2107 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Policeman |
| Township / Ward | New Haven City |
| Est. Birth Year | ~1897 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Irene Mccormack | Daughter | — | 29 | ~1911 |
| John Mccormack | Head | — | 43 | ~1897 |
| Ellen Mccormack | Daughter | — | 15 | ~1925 |
| Edward Mccormack | Son | — | 11 | ~1929 |
| Joseph Mccormack | Son | — | 8 | ~1932 |
| Thomas Mccormack | Son | — | 17 | ~1923 |
| Mary Mccormack | Daughter | — | 18 | ~1922 |
| Marguerite Mccormack | Daughter | — | 13 | ~1927 |
| Ellen Mccormack | Spouse | — | 45 | ~1895 |
Census Appearances
1930
New Haven, …
Head, age 33
New Haven, Connecticut · implied b. ~1897 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCormack |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | New York |
| Age at First Marriage | 22 |
| Father's Birthplace | Canada-Eng. |
| Mother's Birthplace | Canada-Eng. |
| Occupation | Policeman |
| Industry | Police Dept. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 30 |
| Radio Set | R |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
New-Haven-County, Connecticut
Head, age 43
New-Haven-County, Connecticut · implied b. ~1897 — 9 household members
| Surname | McCormack |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | New Haven city |
| 1935 Residence (County) | New Haven |
| Occupation | Policeman |
| Industry | City Police Dept |
| Class of Worker | GW |
| Hours Worked | 48 |
| Income (1939) | 2107 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Mccormack
Head · 1940 · age 43 · b. ~1897 · Connecticut
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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 — New-Haven-County, Connecticut
Open full size
1940 US Federal Census — New-Haven-County, Connecticut
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00541-00328)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Arthur P. Clark | 50 | Head | Janitor | Connecticut |
| 2 | Myrtle L. Clark | 35 | Wife | — | Virginia |
| 3 | Sherwood A. Clark | 6 | Son | — | Connecticut |
| 4 | Edward H. Clark | 4 | Son | — | Connecticut |
| 5 | Albert Levy | 50 | Head | Tailor | England |
| 6 | Elizabeth A. Levy | 42 | Wife | — | Hungary |
| 7 | Frances H. Levy | 20 | Daughter | — | Connecticut |
| 8 | Rose J. Levy | 13 | Daughter | — | Connecticut |
| 9 | Marilyn S. Levy | 9 | Daughter | — | Connecticut |
| 10 | Erin K. Mcnamara | 38 | Head | Electrician | Connecticut |
| 11 | Ruth L. Mcnamara | 33 | Wife | — | Connecticut |
| 12 | Erin K. Jr. Mcnamara | 16 | Son | — | Connecticut |
| 13 | John B. Mcnamara | 13 | Son | — | Connecticut |
| 14 | Barbara A. Mcnamara | 1 | Daughter | — | Connecticut |
| 15 | Harry R. Dadio | 40 | Head | Violinist | Connecticut |
| 16 | Millie Dadio | 39 | Wife | — | New York |
| 17 | Vincent Dadio | 22 | Son | Florist | Connecticut |
| 18 | Stephen A. Dadio | 21 | Son | Florist | Connecticut |
| 19 | Charlotte Dadio | 18 | Daughter | Filing Clerk | Connecticut |
| 20 | Marie Dadio | 8 | Daughter | — | Connecticut |
| 21 | John J. Mccormack THIS PERSON | 43 | Head | Policeman | New York |
| 22 | Ellen F. Mccormack | 45 | Wife | — | Connecticut |
| 23 | Irene M. Mccormack | 29 | Daughter | Time Clerk | Connecticut |
| 24 | Mary C. Mccormack | 18 | Daughter | Time Clerk | Connecticut |
| 25 | Thomas E. Mccormack | 17 | Son | — | Connecticut |
| 26 | Ellen Mccormack | 15 | Daughter | — | Connecticut |
| 27 | Marguerite Mccormack | 13 | Daughter | — | Connecticut |
| 28 | Edward Mccormack | 11 | Son | — | Connecticut |
| 29 | Joseph Mccormack | 8 | Son | — | Connecticut |
| 30 | Marjorie H. Patch | 41 | Head | Salad Maker | Connecticut |
| 31 | Doris F. Mcmullen | 20 | Daughter | Dictaphone Operator | Connecticut |
| 32 | Catherine H. Mcmullen | 18 | Daughter | Book Keeper | Connecticut |
| 33 | Edward J. Mcmullen | 16 | Son | — | Connecticut |
| 34 | Kenneth P. Mcmullen | 15 | Son | — | Connecticut |
| 35 | Guy W. Brown | 71 | Head | — | New Hampshire |
| 36 | Jessie M. Brown | 55 | Wife | — | New Hampshire |
| 37 | Archel G. Brown | 37 | Son | Truck Driver | New Hampshire |
| 38 | Wanda E. Regulz | 16 | Ward | — | Connecticut |
| 39 | Helen D. Horne | 12 | Ward | — | Connecticut |
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)