JC
James Crowley — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this James Crowley across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents James & John — first a son (b.~1918), then head of a 4-person household.
Age 22
b. ~1918
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Crowley |
| Given Name | James L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Mechanic |
| Industry | Electric appliance factory |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 800 |
| Highest Grade | Hs 4 |
| 1935 Residence | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Mechanic |
| Township / Ward | Forest Park |
| 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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Ebba Crowley | Spouse | — | 51 | ~1889 |
| James Crowley | Son | — | 22 | ~1918 |
| John Crowley | Head | — | 52 | ~1888 |
| Virginia Crowley | Daughter | — | 19 | ~1921 |
Census Appearances
1920
Cook, Illinois
Son, age 1
Cook, Illinois · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Crowley |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 12
Cook, Illinois · implied b. ~1918 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Crowley |
| 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/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 22
Cook-County, Illinois · implied b. ~1918 — 4 household members
| Surname | Crowley |
| Given Name | James L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Occupation | Mechanic |
| Industry | Electric appliance factory |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 800 |
| Highest Grade | Hs 4 |
| 1935 Residence | Illinois |
| 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 Crowley across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Crowley (~0.92 confidence) and father John Crowley (~0.92 confidence) and father John Crowley (~0.92 confidence) and mother Ebba Crowley (~0.92 confidence) and mother Elizabeth Crowley (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Crowley
b. ~1888
Source father
● Household
· direct · ~0.92
Father
John Crowley
b. ~1888
Source father
● Household
· direct · ~0.92
Father
John Crowley
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Ebba Crowley
b. ~1889
Source mother
● Household
· direct · ~0.92
Mother
Elizabeth Crowley
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Crowley
Son · 1940 · age 22 · b. ~1918 · Illinois
★ You are viewing this record
Sibling
Virginia Crowley
Sibling · 1940 · age 19
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
40 people indexed on this census page (nara:1940:m-t0627-00786-00873)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Minnie Wentland | 64 | Wife | — | Poland |
| 2 | Molly Benner | 29 | Daughter | Office Clerk | Illinois |
| 3 | Emil Benner | 32 | Son-in-law | Machinist | Germany |
| 4 | Ewald Wentland | 32 | Head | Driver | Illinois |
| 5 | Lois Wentland | 25 | Wife | — | Michigan |
| 6 | Phyllis Jane Wentland | 3 | Daughter | — | Illinois |
| 7 | Edward Wentland | 1 | Son | — | Illinois |
| 8 | George Schoenwolf | 32 | Head | Salesman | Illinois |
| 9 | Helen Schoenwolf | 36 | Wife | — | Pennsylvania |
| 10 | Margaret Schoenwolf | 9 | Daughter | — | Illinois |
| 11 | John J. Crowley | 52 | Head | Receiving Clerk | Illinois |
| 12 | Ebba B. Crowley | 51 | Wife | — | Massachusetts |
| 13 | James L. Crowley THIS PERSON | 22 | Son | Mechanic | Illinois |
| 14 | Virginia M. Crowley | 19 | Daughter | Packer | Illinois |
| 15 | Wilma Welch | 48 | Head | Housework | Illinois |
| 16 | Elaine Welch | 13 | Daughter | — | Illinois |
| 17 | Betty Welch | 5 | Daughter | — | Illinois |
| 18 | Charles Troschein | 82 | Head | — | Germany |
| 19 | Leoyal Nelson | 44 | Head | Office Clerk | Illinois |
| 20 | Ruth Nelson | 44 | Wife | — | Illinois |
| 21 | Dorothy Nelson | 17 | Daughter | — | Illinois |
| 22 | Leoyal Jr. Nelson | 13 | Son | — | Illinois |
| 23 | Albert Rathke | 52 | Head | Foreman | Illinois |
| 24 | Martha Rathke | 51 | Wife | — | Illinois |
| 25 | Florence Rathke | 20 | Daughter | Office Clerk | Illinois |
| 26 | Ernest Muehlenhaupt | 60 | Head | Stockman | Germany |
| 27 | Magdalene Muehlenhaupt | 49 | Wife | — | Wisconsin |
| 28 | Hattie Robbein | 68 | Head | — | Illinois |
| 29 | Olive Cooley | 52 | Sister | — | Germany |
| 30 | Jennie E. Anderson | 70 | Sister | — | Illinois |
| 31 | Hilliard E. Jenkins | 56 | Head | Physician | Iowa |
| 32 | Anthony Scolaro | 36 | Head | Proprietor | Illinois |
| 33 | Mary Scolaro | 34 | Wife | Assistant | Illinois |
| 34 | August Scolaro | 12 | Son | — | Illinois |
| 35 | Joseph Scolaro | 4 | Son | — | Illinois |
| 36 | John R. Collis | 28 | Head | Lawyer | Illinois |
| 37 | Vera Collis | 23 | Wife | — | Illinois |
| 38 | Arthur Sahlin | 27 | Head | Receiving Clerk | Illinois |
| 39 | Cecelia Sahlin | 23 | Wife | Typist | Illinois |
| 40 | Henry Decens | 45 | Head | Optometrist | Illinois |
Pedigree Summary
James + 1 sibling
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)