WM
William Mccarthy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · St.-Louis-County, Missouri
Our Model Tree links this William Mccarthy across the 1930 and 1940 US Censuses in St.-Louis-County, Missouri (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 11-person household.
Age 15
b. ~1925
Male
Son
Born: Missouri
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Louis-County, Missouri |
| Surname | McCarthy |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | Webster Groves |
| 1935 Residence (County) | St Louis |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | H 1 |
| 1935 Residence | Missouri |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Township / Ward | Oakland Village |
| Est. Birth Year | ~1925 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Nora Mccarthy | Daughter | — | 25 | ~1915 |
| Dolores Mccarthy | Daughter | — | 18 | ~1922 |
| Margaret Mccarthy | Daughter | — | 14 | ~1926 |
| Mary Mccarthy | Daughter | — | 20 | ~1920 |
| Robert Mccarthy | Head | — | 45 | ~1895 |
| William Mccarthy | Son | — | 15 | ~1925 |
| Jerome Mccarthy | Son | — | 5 | ~1935 |
| Robert Mccarthy | Son | — | 21 | ~1919 |
| Thomas Mccarthy | Son | — | 7 | ~1933 |
| Jack Mccarthy | Son | — | 8 | ~1932 |
| Katherine Mccarthy | Spouse | — | 42 | ~1898 |
Census Appearances
Son, age 4
St Louis, Missouri · implied b. ~1926 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCarty |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Occupation | none |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
St.-Louis-County, Missouri
Son, age 15
St.-Louis-County, Missouri · implied b. ~1925 — 11 household members
| Surname | McCarthy |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | Webster Groves |
| 1935 Residence (County) | St Louis |
| Income (1939) | 0 |
| Highest Grade | H 1 |
| 1935 Residence | Missouri |
| 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 William Mccarthy across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Mccarthy
Son · 1940 · age 15 · b. ~1925 · Missouri
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Sibling
Nora Mccarthy
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jack Mccarthy
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dolores Mccarthy
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jerome Mccarthy
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Mccarthy
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Mccarthy
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Mccarthy
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Mccarthy
Sibling · 1940 · age 21
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
1940 US Federal Census — St.-Louis-County, Missouri
Open full size
1940 US Federal Census — St.-Louis-County, Missouri
Page Contents
37 people indexed on this census page (nara:1940:m-t0627-02150-00021)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Katherine Schwaeppe | 19 | Wife | Salesgirl | Missouri |
| 42 | Edward F. Harris | 76 | Head | — | Missouri |
| 43 | Elizabeth M. Harris | 75 | Wife | — | Missouri |
| 46 | Henry L. Johnson | 37 | Head | Grocer | South Carolina |
| 47 | Jesse Ulrich | 59 | Head | Gardner | Czechoslovakia |
| 48 | Anna Ulrich | 57 | Wife | — | Missouri |
| 49 | Geraldine Ulrich | 16 | Daughter | — | Missouri |
| 50 | Cecil W. Dowell | 39 | Head | Plumber | Illinois |
| 51 | Ruby D. Dowell | 38 | Wife | — | Illinois |
| 52 | Cecil W. Dowell | 19 | Son | — | Illinois |
| 53 | William E. Dowell | 16 | Son | — | Illinois |
| 54 | William J. Mcgovern | 50 | Head | Owner | Missouri |
| 55 | Olga Mcgovern | 47 | Wife | — | Missouri |
| 56 | Gilbert F. Hartman | 27 | Son-in-law | Metal Worker | Missouri |
| 57 | Dorothy E. Hartman | 27 | Daughter | — | Missouri |
| 58 | Gayle L. Hartman | 2 | Granddaughter | — | Missouri |
| 59 | Mae B. Byrne | 43 | Head | Stenographer | Missouri |
| 60 | Thomas C. Byrne | 47 | Brother | — | Missouri |
| 61 | Edith L. Read | 57 | Head | — | Ohio |
| 62 | Joseph L. Stephens | 30 | Son | Attendant | Missouri |
| 63 | Elizabeth L. Lee | 75 | Mother | — | Ohio |
| 64 | Madeline Richterbeck | 73 | Guest | — | Ohio |
| 66 | Robert J. Mccarthy | 45 | Head | Dept Head | Missouri |
| 67 | Katherine Mccarthy | 42 | Wife | — | Missouri |
| 68 | Nora M. Mccarthy | 25 | Daughter | Billing Clerk | Missouri |
| 69 | Robert J. Jr. Mccarthy | 21 | Son | New Worker | Missouri |
| 70 | Mary C. Mccarthy | 20 | Daughter | Stenographer | Missouri |
| 71 | Dolores A. Mccarthy | 18 | Daughter | New Worker | Missouri |
| 72 | William Mccarthy THIS PERSON | 15 | Son | — | Missouri |
| 73 | Margaret Mccarthy | 14 | Daughter | — | Missouri |
| 74 | Jack J. Mccarthy | 8 | Son | — | Missouri |
| 75 | Thomas J. Mccarthy | 7 | Son | — | Missouri |
| 76 | Jerome R. Mccarthy | 5 | Son | — | Missouri |
| 77 | James W. Sturm | 37 | Head | Assistant Pres | Missouri |
| 78 | Mary B. Sturm | 37 | Wife | — | Missouri |
| 79 | James W. Sturm | 9 | Son | — | Colorado |
| 80 | Caroline E. Sturm | 5 | Daughter | — | Ohio |
Related Census Records
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)