JM
James Mcgrath — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this James Mcgrath across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Patrick & Thomas — first a son (b.~1918), then head of a 10-person household.
Age 22
b. ~1918
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | McGrath |
| Given Name | James |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | River Forest |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | shipping clerk |
| Industry | photo engraving |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2261 |
| Highest Grade | C 2 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Shipping Clerk |
| Township / Ward | River Forest |
| Est. Birth Year | ~1918 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Mary Keating | Daughter | — | 30 | ~1910 |
| Winifred Mcgrath | Daughter | — | 34 | ~1906 |
| Mabel Mcgrath | Head | — | 56 | ~1884 |
| James Keating | Other | — | 29 | ~1911 |
| James Keating | Other | — | 5 | ~1935 |
| Elizabeth Hruby | Other | — | 56 | ~1884 |
| Michael Mcgrath | Son | — | 29 | ~1911 |
| Edward Mcgrath | Son | — | 23 | ~1917 |
| James Mcgrath | Son | — | 22 | ~1918 |
| Matthew Mcgrath | Son | — | 26 | ~1914 |
Census Appearances
1920
Cook, Illinois
Son, age 1
Cook, Illinois · implied b. ~1919 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | James |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Mother Tongue | English |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 11
Cook, Illinois · implied b. ~1919 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 22
Cook-County, Illinois · implied b. ~1918 — 10 household members
| Surname | McGrath |
| Given Name | James |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | River Forest |
| 1935 Residence (County) | Cook |
| Occupation | shipping clerk |
| Industry | photo engraving |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2261 |
| Highest Grade | C 2 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 James Mcgrath across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Patrick Mcgrath (~0.92 confidence) and father Thomas Mcgrath (~0.92 confidence) and mother Mabel Mcgrath (~0.92 confidence) and mother Nellie Mcgrath (~0.92 confidence) and mother Margaret Mcgrath (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Patrick Mcgrath
b. ~1877
Source father
● Household
· direct · ~0.92
Father
Thomas Mcgrath
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Mabel Mcgrath
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Nellie Mcgrath
b. ~1885
Source mother
● Household
· direct · ~0.92
Mother
Margaret Mcgrath
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Mcgrath
Son · 1940 · age 22 · b. ~1918 · Illinois
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Sibling
Winifred Mcgrath
Sibling · 1940 · age 34
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Mcgrath
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Matthew Mcgrath
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Keating
Sibling · 1940 · age 30
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Michael Mcgrath
Sibling · 1940 · age 29
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 — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
32 people indexed on this census page (nara:1940:m-t0627-00788-00557)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ella Sievers | 38 | servant | Housemaid | Illinois |
| 42 | Joseph J. Fraser | 65 | Head | Executive | Canada-English |
| 43 | Bessie M. Fraser | 66 | wife | — | Massachusetts |
| 44 | Marion E. Langley | 22 | servant | House Maid | Illinois |
| 45 | Mabel Mcgrath | 56 | Head | — | Illinois |
| 46 | Winifred Mcgrath | 34 | daughter | Secretary | Illinois |
| 47 | Michael Mcgrath | 29 | son | Shipping Clerk | Illinois |
| 48 | Matthew Mcgrath | 26 | son | Salesman | Illinois |
| 49 | Edward Mcgrath | 23 | son | General Clerk | Illinois |
| 50 | James Mcgrath THIS PERSON | 22 | son | Shipping Clerk | Illinois |
| 51 | Mary Keating | 30 | daughter | — | Illinois |
| 52 | James E. Keating | 29 | son in law | Salesman | Illinois |
| 53 | James E. Keating | 5 | grandson | — | Illinois |
| 54 | Elizabeth Hruby | 56 | servant | Housemaid | Czecho-Slovakia |
| 55 | Peter S. Massey | 52 | Head | Manager | Florida |
| 56 | Elizabeth B. Massey | 41 | wife | — | Illinois |
| 57 | Peter S. Jr. Massey | 15 | son | — | Illinois |
| 58 | Robert Massey | 14 | son | — | Illinois |
| 59 | Paul H. Massey | 11 | son | — | Illinois |
| 60 | Richard Massey | 5 | son | — | Illinois |
| 61 | Horace Redmond | 38 | servant | Chauffer | Kentucky |
| 62 | Matilda Tempes | 40 | servant | Housemaid | Roumania |
| 63 | Don W. Riley | 51 | Head | Broker | Illinois |
| 64 | Florence Riley | 50 | wife | — | Illinois |
| 65 | Clinton Skiles Riley | 24 | son | — | Illinois |
| 66 | Jean Riley | 19 | daughter | — | Illinois |
| 67 | Donald Arthur Riley | 17 | son | — | Illinois |
| 68 | Earle B. Fowler | 55 | Head | Surgeon | Illinois |
| 69 | Barbara B. Fowler | 45 | wife | — | Illinois |
| 70 | Nathalie Fowler | 16 | daughter | — | Illinois |
| 71 | Frances Blatchford | 73 | mother in law | — | Maine |
| 72 | Gladys Grantum | 30 | servant | Housemaid | Illinois |
Pedigree Summary
James + 5 siblings
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
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)