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John Mccormack — 1930 US Census Record
Model Tree available1930 United States Federal Census · Essex, New Jersey
Our Model Tree links this John Mccormack across the 1920, 1930 and 1940 US Censuses in Essex, New Jersey (XGBoost, ~Confirmed), with identified parents John & Michael — first a son (b.~1908), then head of a 4-person household.
Age 22
b. ~1908
Male
Son
Born: New Jersey
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Essex, New Jersey |
| Surname | McCormack |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New York |
| Additional Details | |
| Occupation | Operator |
| Industry | Pump Mfg Co |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Operator |
| Township / Ward | East Orange City |
| Est. Birth Year | ~1908 |
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 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Harriet Mccormack | Head | — | 48 | ~1882 |
| John Mccormack | Son | — | 22 | ~1908 |
| Isabel Shannon | Other | — | 32 | ~1898 |
| Isabel Mccormack | Daughter | — | 11 | ~1919 |
Census Appearances
Son, age 12
Essex, New Jersey · implied b. ~1908 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCormick |
| Given Name | John A. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New York |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Essex, New …
Son, age 22
Essex, New Jersey · implied b. ~1908 — 4 household members
| Surname | McCormack |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New York |
| Occupation | Operator |
| Industry | Pump Mfg Co |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Essex-County, New …
Son, age 33
Essex-County, New Jersey · implied b. ~1907 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mc Cormick |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | West Orange |
| 1935 Residence (County) | Essex |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
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 Mccormick (~0.92 confidence) and father Michael Mc Cormick (~0.92 confidence) and mother Harriet Mccormack (~0.92 confidence) and mother Jennie Mccormick (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Mccormick
b. ~1881
Source father
● Household
· direct · ~0.92
Father
Michael Mc Cormick
b. ~1873
Source father
● Household
· direct · ~0.92
Mother
Harriet Mccormack
b. ~1882
Source mother
● Household
· direct · ~0.92
Mother
Jennie Mccormick
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Mccormack
Son · 1930 · age 22 · b. ~1908 · New Jersey
★ You are viewing this record
Sibling
Isabel Mccormack
Sibling · 1930 · age 11
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 — Essex, New Jersey
Open full size
1930 US Federal Census — Essex, New Jersey
Page Contents
50 people indexed on this census page (ia:1930:newjerseycensus00reel1330:0107)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Harriet Mccormack | 48 | Head | — | North Ireland |
| 52 | John Mccormack THIS PERSON | 22 | Son | Operator | New Jersey |
| 53 | Isabel Mccormack | 11 | Daughter | — | New Jersey |
| 54 | Isabel Shannon | 32 | Sister | Stenographer | New York |
| 55 | Roy D. Claycomb | 44 | Head | Yardmaster | Pennsylvania |
| 56 | Edith F. Claycomb | 37 | Wife | Buyer | Colorado |
| 57 | Sarah Dalley | 70 | Boarder | — | New Jersey |
| 58 | Florence V. Rodman | 12 | Boarder | — | West Virginia |
| 59 | Frederick Darmstatter | 48 | Head | President | Germany |
| 60 | Bertha R. Darmstatter | 34 | Wife | — | New York |
| 61 | George Darmstatter | 8 | Son | — | New York |
| 62 | Bridget Gallagher | 63 | Head | — | North Ireland |
| 63 | Sarah Gallagher | 20 | Daughter | — | Pennsylvania |
| 64 | James Foley | 25 | Nephew | Bookkeeper | Pennsylvania |
| 65 | James J. Leary | 42 | Head | Mechanic | New Jersey |
| 66 | Helen L. Leary | 42 | Wife | — | New Jersey |
| 67 | Marie R. Leary | 20 | Daughter | Stenographer | New Jersey |
| 68 | Rita M. Leary | 18 | Daughter | Bookkeeper | New Jersey |
| 69 | James J. Jr. Leary | 16 | Son | Bookkeeper | New Jersey |
| 70 | Francis A. Leary | 11 | Son | — | New Jersey |
| 71 | Rose F. Leary | 8 | Daughter | — | New Jersey |
| 72 | Carlo F. Muro | 32 | Head | Instructor | Italy |
| 73 | Theresa Muro | 28 | Wife | — | Italy |
| 74 | James Cortes | 39 | Head | Restaurant | Greece |
| 75 | Mary R. Cortes | 39 | Wife | — | Czechoslovakia |
| 76 | Muriel E. Crane | 14 | Step-daughter | — | New Jersey |
| 77 | Andrew J. Crane | 12 | Step-son | — | New Jersey |
| 78 | Frederick J. Crane | 9 | Step-son | — | New Jersey |
| 79 | George J. Cortes | 1 | Son | — | New Jersey |
| 80 | Isabella Jones | 70 | Head | Domestic | Virginia |
| 81 | Susan J. Goode | 73 | Sister | — | Virginia |
| 82 | David S. Richards | 46 | Head | Auto Mechanic | New Jersey |
| 83 | May E. Richards | 39 | Wife | — | New Jersey |
| 84 | James A. Cooke | 65 | Head | Student | New York |
| 85 | Emma J. Cooke | 55 | Wife | — | North Ireland |
| 86 | Harry E. Cooke | 32 | Son | Electrician | New York |
| 87 | Mildred M. Cooke | 29 | Daughter-in-law | School Teacher | New York |
| 88 | George A. Dahlmeyer | 50 | Head | Installer | Connecticut |
| 89 | Amelia Dahlmeyer | 45 | Wife | — | New York |
| 90 | George A. Dahlmeyer | 20 | Son | Clerk | Connecticut |
| 91 | Elsie A. Dahlmeyer | 16 | Son | — | New Jersey |
| 92 | George H. Tenney | 60 | Head | Letter Carrier | New York |
| 93 | Laura M. Wilder | 58 | Head | Sawyer | New Jersey |
| 94 | Raymond Kingsland | 30 | Head | Salesman | New Jersey |
| 95 | Anna A. Kingsland | 31 | Wife | — | New Jersey |
| 96 | Raymond W. Kingsland | 4 | Son | — | New Jersey |
| 97 | Eva M. Stallworth | 38 | Head | Bookkeeper | New Jersey |
| 98 | George S. Strong | 51 | Head | Salesman | Scotland |
| 99 | Mary J. Strong | 45 | Wife | — | Scotland |
| 100 | Dorothy Strong | 9 | Daughter | — | England |
Related Census Records
Pedigree Summary
John + 1 sibling
Gen 1 · 4 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)