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John Mccormack — 1930 US Census Record
Linked across censuses1930 United States Federal Census · St Louis, Missouri
Our Model Tree links this John Mccormack across the 1930 and 1940 US Censuses in St Louis, Missouri (XGBoost, ~Confirmed) — first a son (b.~1924), then head of a 9-person household.
Age 6
b. ~1924
Male
Son
Born: Missouri
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | St Louis, Missouri |
| Surname | McCormack |
| Given Name | John R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Additional Details | |
| Can Read/Write | none |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Township / Ward | St Louis City |
| Est. Birth Year | ~1924 |
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 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Leo Mccormack | Son | — | 15 | ~1915 |
| Rose Mccormack | Daughter | — | 3 | ~1927 |
| Marlys Mccormack | Daughter | — | 7 | ~1923 |
| Francis Mccormack | Head | — | 43 | ~1887 |
| Mary Mccormack | Spouse | — | 41 | ~1889 |
| Margaret Mccormack | Daughter | — | 12 | ~1918 |
| John Mccormack | Son | — | 6 | ~1924 |
| Alfonse Mccormack | Son | — | 1 | ~1929 |
| Francis Mccormack | Son | — | 16 | ~1914 |
Census Appearances
1930
St Louis, …
Son, age 6
St Louis, Missouri · implied b. ~1924 — 9 household members
| Surname | McCormack |
| Given Name | John R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Can Read/Write | none |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
St.-Louis-City-County, Missouri
Son, age 16
St.-Louis-City-County, Missouri · implied b. ~1924 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCormick |
| Given Name | John R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | St Louis (City) |
| 1935 Residence (County) | St. Louis City |
| Hours Worked | 0 |
| Highest Grade | H 1 |
| 1935 Residence | Same house |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
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.
Show:
This person
Anchor record
John Mccormack
Son · 1930 · age 6 · b. ~1924 · Missouri
★ You are viewing this record
Sibling
Marlys Mccormack
Sibling · 1930 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Mccormack
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rose Mccormack
Sibling · 1930 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alfonse Mccormack
Sibling · 1930 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Mccormack
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leo Mccormack
Sibling · 1930 · age 15
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 — St Louis, Missouri
Open full size
1930 US Federal Census — St Louis, Missouri
Page Contents
50 people indexed on this census page (ia:1930:missouricensus00reel1244:1001)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Richard Doherty | 22 | Nephew | Plasterer | Ireland |
| 52 | Mary A. Young | 57 | Head | None | Pennsylvania |
| 53 | Alicia Young | 28 | Daughter | Stenographer | Missouri |
| 54 | Elizabeth Young | 18 | Daughter | Stenographer | Missouri |
| 55 | Edith Pace | 17 | Daughter | Factory Worker | Arkansas |
| 56 | Nellie Towns | 27 | Head | None | Iowa |
| 57 | Francis X. Mccormack | 43 | Head | Sergeant | Missouri |
| 58 | Mary A. Mccormack | 41 | Wife | None | Missouri |
| 59 | Francis M. Mccormack | 16 | Son | None | Missouri |
| 60 | Leo Mccormack | 15 | Son | None | Missouri |
| 61 | Margaret Mccormack | 12 | Daughter | None | Missouri |
| 62 | Marlys Mccormack | 7 | Daughter | None | Missouri |
| 63 | John R. Mccormack THIS PERSON | 6 | Son | — | Missouri |
| 64 | Rose M. Mccormack | 3 | Daughter | — | Missouri |
| 65 | Alfonse Mccormack | 1 | Son | — | Missouri |
| 66 | Raymond Mueller | 26 | Head | Upholsterer | Missouri |
| 67 | Helen Mueller | 24 | Wife | None | Missouri |
| 68 | Dorothy M. Mueller | 3 | Daughter | — | Missouri |
| 69 | Jack Hogan | 53 | Uncle | Roofer | Missouri |
| 70 | Frank Shram | 58 | Head | Merchant | Russia |
| 71 | Ida Shram | 58 | Wife | None | Russia |
| 72 | Adele Shram | 21 | Daughter | Bookkeeper | Missouri |
| 73 | Arthur F. Wood | 37 | Head | Mail Carrier | Illinois |
| 74 | Mabel Wood | 28 | Wife | None | Illinois |
| 75 | Winona Kuykendall | 24 | Lodger | Mail Carrier | Missouri |
| 76 | Theodore A. Miller | 42 | Head | Steamfitter | Missouri |
| 77 | Carrie Miller | 42 | Wife | None | Missouri |
| 78 | Fred Buedinger | 57 | Head | Cabinet Maker | Germany |
| 79 | Milton F. Buedinger | 26 | Son | Die Maker | Missouri |
| 80 | Loretta Buedinger | 21 | Daughter | None | Missouri |
| 81 | Joseph Buedinger | 83 | Father | None | Germany |
| 82 | Edward Buedinger | 53 | Brother | Clerk | Missouri |
| 83 | Jacob Kickel | 68 | Head | Tailor | Russia |
| 84 | Sadie Kickel | 58 | Wife | None | Russia |
| 85 | Mina Kickel | 19 | Daughter | Bookkeeper | Missouri |
| 86 | Eura Halperstein | 31 | Head | None | Austria |
| 87 | Ida Elberstein | 15 | Daughter | None | Russia |
| 88 | Rose Elberstein | 9 | Daughter | None | Missouri |
| 89 | Dan R. Cull | 57 | Head | None | Louisiana |
| 90 | Florence Cull | 57 | Wife | None | Louisiana |
| 91 | Louise Cull | 26 | Daughter | Operator | Missouri |
| 92 | Jeanette M. Cull | 23 | Daughter | Operator | Missouri |
| 93 | Florence M. Cull | 21 | Daughter | Operator | Missouri |
| 94 | Dave Fleming | 45 | Head | Bricklayer | Kansas |
| 95 | Marie Fleming | 32 | Wife | None | Missouri |
| 96 | Griffin Fleming | 10 | Son | None | Missouri |
| 97 | Herbert Fleming | 7 | Son | None | Missouri |
| 98 | Emil Haferskamp | 42 | Head | Salesman | Missouri |
| 99 | Selma Haferskamp | 39 | Wife | None | Missouri |
| 100 | Mabel Haferskamp | 18 | Daughter | Winder | Missouri |
Related Census Records
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)