JI
James Irwin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this James Irwin across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 4-person household.
Age 15
b. ~1925
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Irwin |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Highest Grade | Hs 1 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago City |
| 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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| James Irwin | Son | — | 15 | ~1925 |
| Raymond Irwin | Head | — | 52 | ~1888 |
| Raymond Irwin | Son | — | 13 | ~1927 |
| Beatrice Irwin | Spouse | — | 42 | ~1898 |
Census Appearances
1930
Cook, Illinois
Son, age 4
Cook, Illinois · implied b. ~1926 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Irwin |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 15
Cook-County, Illinois · implied b. ~1925 — 4 household members
| Surname | Irwin |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Highest Grade | Hs 1 |
| 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 Irwin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Irwin
Son · 1940 · age 15 · b. ~1925 · Illinois
★ You are viewing this record
Sibling
Raymond Irwin
Sibling · 1940 · age 13
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-t0627-00939-00093)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ronald Anderson | 3 | Son | — | Illinois |
| 2 | Thomas Kulick | 43 | Head | Estimator | Massachusetts |
| 3 | Cecelia Kulick | 44 | Wife | — | Illinois |
| 4 | Edward Kulick | 14 | Son | — | Illinois |
| 5 | Benjamin Busch | 60 | Head | Inspector | Illinois |
| 6 | Grace Busch | 48 | Wife | — | Illinois |
| 7 | Raymond Irwin | 52 | Head | Clerk | Illinois |
| 8 | Beatrice Irwin | 42 | Wife | — | Illinois |
| 9 | James Irwin THIS PERSON | 15 | Son | — | Illinois |
| 10 | Raymond Irwin | 13 | Son | — | Illinois |
| 11 | Ralph H. Creasy | 40 | Head | Clerk | England |
| 12 | Margaret C. Creasy | 38 | Wife | Clerk | Illinois |
| 13 | Karl Bubeck | 31 | Head | Machinist | Germany |
| 14 | Gertrude Bubeck | 25 | Wife | Comptometer Opr | Illinois |
| 15 | George H. Olson | 48 | Head | Elevator Oper | Wisconsin |
| 16 | Lillian Olson | 48 | Wife | — | Michigan |
| 17 | George Jr. Olson | 19 | Son | — | Wisconsin |
| 18 | Frank Sladek | 26 | Head | Maintenance Mechanic | Illinois |
| 19 | Helen Sladek | 26 | Wife | — | Illinois |
| 20 | Francis Sladek | 2 | Son | — | Illinois |
| 21 | Ellen Stenwall | 44 | Head | Seamstress | Sweden |
| 22 | Emil Nicklaus | 53 | Lodger | Foreman | Sweden |
| 23 | Gertrude Nicklaus | 39 | Lodger | Maid | Sweden |
| 24 | Kerstin Stenwall | 21 | Daughter | Maid | Sweden |
| 25 | Rollie Taylor | 38 | Head | Traffic Clerk | Kentucky |
| 26 | Alta Taylor | 37 | Wife | — | Iowa |
| 27 | Dorothy Taylor | 16 | Daughter | — | Illinois |
| 28 | Charles Edwards | 49 | Head | Housemaid | Illinois |
| 29 | Esther Edwards | 37 | Wife | Seamstress | Illinois |
| 30 | John Drazdowskas | 56 | Head | Carpenter | Lithuania |
| 31 | Elizabeth Drazdowskas | 49 | Wife | — | Lithuania |
| 32 | Jens Olsen | 49 | Head | Maintenance Man | Denmark |
| 33 | Elizabeth Olsen | 51 | Wife | — | Denmark |
| 34 | Rhoda Olsen | 9 | Daughter | — | Illinois |
| 35 | Richard White | 28 | Head | Production Man | Illinois |
| 36 | Emily White | 28 | Wife | — | Illinois |
| 37 | Martha Gimzauskas | 50 | Mother-in-law | — | Lithuania |
| 38 | Ignatz Gialguinas | 52 | Head | Carpenter | Lithuania |
| 39 | Kasimera Gialguinas | 48 | Wife | Button Hole Maker | Lithuania |
| 40 | Janette Gialguinas | 22 | Daughter | Beauty Operator | Illinois |
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)