TF
Thomas Fitzpatrick — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Thomas Fitzpatrick across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents John & Isabel — first a head (b.~1912), then head of a 4-person household.
Age 28
b. ~1912
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Fitzpatrick |
| Given Name | Thomas |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Secretary |
| Industry | Alderman |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 2368 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Secretary |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1912 |
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 Thomas | Age | Birth yr |
|---|---|---|---|---|
| Charlotte Fitzpatrick | Spouse | — | 28 | ~1912 |
| Maureen Fitzpatrick | Daughter | — | ~1940 | |
| Thomas Fitzpatrick | Head | — | 28 | ~1912 |
| Charleen Fitzpatrick | Daughter | — | 1 | ~1939 |
Census Appearances
1920
Cook, Illinois
Son, age 7
Cook, Illinois · implied b. ~1913 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fitzpatrick |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Pennsylvania |
| 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 17
Cook, Illinois · implied b. ~1913 — 50 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fitzpatrick |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 28
Cook-County, Illinois · implied b. ~1912 — 4 household members
| Surname | Fitzpatrick |
| Given Name | Thomas |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Secretary |
| Industry | Alderman |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 2368 |
| Highest Grade | Hs 4 |
| 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 Thomas Fitzpatrick across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Fitzpatrick (~0.92 confidence) and mother Isabel Fitzpatrick (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Fitzpatrick
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Isabel Fitzpatrick
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Fitzpatrick
Head · 1940 · age 28 · b. ~1912 · 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-t0627-00959-00602)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charles Meagher | 25 | Son | Orderly | Illinois |
| 2 | Angus Davidson | 47 | Head | Carpenter | Illinois |
| 3 | Ethel Davidson | 44 | Wife | — | Illinois |
| 4 | Beverly Davidson | 11 | Daughter | — | Illinois |
| 5 | Claire Davidson | 5 | Daughter | — | Illinois |
| 6 | Raymond Janeczek | 31 | Head | Accountant | Illinois |
| 7 | Ruth Janeczek | 31 | Wife | — | Illinois |
| 8 | Diane Janeczek | 2 | Daughter | — | Illinois |
| 9 | Earl La Barre | 54 | Head | Service Inspector | Michigan |
| 10 | Gracia La Barre | 54 | Wife | — | Michigan |
| 11 | Paul Davidson | 44 | Head | Gen Foreman | Illinois |
| 12 | Jennie Davidson | 44 | Wife | — | Illinois |
| 13 | Isabel Davidson | 19 | Daughter | Steno. | Illinois |
| 14 | Harry Davidson | 15 | Son | Delivery Boy | Illinois |
| 15 | — | None | — | — | — |
| 16 | Jacob Hostrup | 42 | Head | Civil Engineer | Iowa |
| 17 | Hester Hostrup | 33 | Wife | — | Michigan |
| 18 | Maryanne Hostrup | 13 | Daughter | — | Michigan |
| 19 | John Hostrup | 7 | Son | — | Illinois |
| 20 | Edwin Podewell | 59 | Head | Barber | Michigan |
| 21 | Anna Podewell | 58 | Wife | — | Germany |
| 22 | Edward Cunningham | 48 | Head | Loco Engineer | Illinois |
| 23 | Marion Cunningham | 46 | Wife | — | Illinois |
| 24 | June Cunningham | 20 | Daughter | — | Illinois |
| 25 | John Cunningham | 18 | Son | — | Illinois |
| 26 | William Cunningham | 16 | Son | — | Illinois |
| 27 | Edward Cunningham | 8 | Son | — | Illinois |
| 28 | Thomas Irwin | 42 | Head | Ind. Engineer | Canada |
| 29 | Emma Irwin | 38 | Wife | — | Wisconsin |
| 30 | Nellas Irwin | 15 | Daughter | — | Minnesota |
| 31 | Kathaleen Irwin | 13 | Daughter | — | Missouri |
| 32 | Thomas Scanlon | 57 | Head | Engineer | Illinois |
| 33 | Harriet Scanlon | 52 | Wife | — | Illinois |
| 34 | Marjorie Scanlon | 23 | Daughter | New Worker | Illinois |
| 35 | — | None | — | — | — |
| 36 | — | None | — | — | — |
| 37 | Thomas Fitzpatrick THIS PERSON | 28 | Head | Secretary | Illinois |
| 38 | Charlotte Fitzpatrick | 28 | Wife | Social Worker | Illinois |
| 39 | Charleen Fitzpatrick | 1 | Daughter | — | Illinois |
| 40 | Maureen Fitzpatrick | 0 | Daughter | — | Illinois |
Search for Thomas Fitzpatrick
All Thomas Fitzpatrick Census Records Discover Fitzpatrick Family TreePedigree Summary
Thomas
Gen 1 · 2 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)