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 James & James — first a head (b.~1908), then head of a 6-person household.
Age 32
b. ~1908
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | McGrath |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Police Officer |
| Industry | City Police |
| Class of Worker | GW |
| Hours Worked | 48 |
| Income (1939) | 2400 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Police Officer |
| Township / Ward | Chicago |
| 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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Mary Mcgrath | Daughter | — | 8 | ~1932 |
| Betty Mcgrath | Daughter | — | 5 | ~1935 |
| James Mcgrath | Head | — | 32 | ~1908 |
| Rudy Mcgrath | Son | — | 5 | ~1935 |
| James Mcgrath | Son | — | 9 | ~1931 |
| Marie Mcgrath | Spouse | — | 32 | ~1908 |
Census Appearances
1920
Cook, Illinois
Son, age 12
Cook, Illinois · implied b. ~1908 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 21
Cook, Illinois · implied b. ~1909 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | chauffeur |
| Industry | Private Family |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 32
Cook-County, Illinois · implied b. ~1908 — 6 household members
| Surname | McGrath |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Occupation | Police Officer |
| Industry | City Police |
| Class of Worker | GW |
| Hours Worked | 48 |
| Income (1939) | 2400 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| 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 James Sluffin (~0.92 confidence) and father James Mcgrath (~0.92 confidence) and mother Catherine Sluffin (~0.92 confidence) and mother Mary Mcgrath (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Sluffin
b. ~1877
Source father
● Household
· direct · ~0.92
Father
James Mcgrath
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Catherine Sluffin
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Mary Mcgrath
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Mcgrath
Head · 1940 · age 32 · b. ~1908 · Illinois
★ You are viewing this record
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
40 people indexed on this census page (nara:1940:m-t0627-00945-00409)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Roberta Johnson | 16 | Daughter | — | Illinois |
| 2 | Arthur Johnson | 14 | Son | — | Illinois |
| 3 | Anthony Johnson | 12 | Daughter | — | Illinois |
| 4 | James Johnson | 1 | Son | — | Illinois |
| 5 | Jennie Anderson | 69 | Mother-in-law | — | Illinois |
| 6 | Francis Durrett | 23 | Head | Laborer | Illinois |
| 7 | Eleanore Durrett | 22 | Wife | — | Illinois |
| 8 | Lawrence Durrett | 3 | Son | — | Illinois |
| 9 | Richard Durrett | 2 | Son | — | Illinois |
| 10 | John Weideman | 46 | Head | Machinist | Illinois |
| 11 | Clara May Weideman | 17 | Daughter | — | Illinois |
| 12 | Frank Kittler | 43 | Head | Laborer | Buffalo N.Y. |
| 13 | Jenny Kittler | 46 | Wife | — | Illinois |
| 14 | Joseph Kittler | 19 | Son | Stock Boy | Illinois |
| 15 | Genevieve Kittler | 16 | Daughter | — | Illinois |
| 16 | Mary Kittler | 15 | Daughter | — | Illinois |
| 17 | Charles Everett | 43 | Head | Salesman | Illinois |
| 18 | Loretta Everett | 34 | Wife | — | Illinois |
| 19 | Jacqueline Everett | 14 | Daughter | — | Illinois |
| 20 | Charles Everett | 11 | Son | — | Illinois |
| 21 | Wilfred Everett | 6 | Son | — | Illinois |
| 22 | Patricia Everett | 2 | Daughter | — | Illinois |
| 23 | James Mcgrath THIS PERSON | 32 | Head | Police Officer | Illinois |
| 24 | Marie Mcgrath | 32 | Wife | — | Illinois |
| 25 | James Jr Mcgrath | 9 | Son | — | Illinois |
| 26 | Mary Ann Mcgrath | 8 | Daughter | — | Illinois |
| 27 | Betty Jane Mcgrath | 5 | Daughter | — | Illinois |
| 28 | Rudy Mcgrath | 5 | Son | — | Illinois |
| 29 | Mary Haby | 52 | Head | — | Illinois |
| 30 | Fred Stevens | 42 | Head | Maint. Man | Illinois |
| 31 | Ann Stevens | 42 | Wife | Telephone Operator | Illinois |
| 32 | Gene Stevens | 19 | Daughter | — | Illinois |
| 33 | Martin Fitzpatrick | 35 | Head | Labor Foreman | Springfield Ill. |
| 34 | Agnes Fitzpatrick | 35 | Wife | — | Illinois |
| 35 | Martin Fitzpatrick | 7 | Son | — | Illinois |
| 36 | Leonard Charles | 25 | Head | Laborer | Illinois |
| 37 | Rose Charles | 24 | Wife | — | Illinois |
| 38 | Charles Charles | 2 | Son | — | Illinois |
| 39 | Charles Starr | 69 | Head | — | Illinois |
| 40 | Augusta Starr | 67 | Wife | — | Illinois |
Pedigree Summary
James
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 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)