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Margaret Fitzpatrick — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Margaret Fitzpatrick across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Frank & George — first a daughter (b.~1916), then head of a 8-person household.
Age 24
b. ~1916
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Fitzpatrick |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| Additional Details | |
| Industry | 0 |
| Highest Grade | Hs 4 |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago |
| Est. Birth Year | ~1916 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| Margarita Fitzpatrick | Spouse | — | 42 | ~1898 |
| Edgar Fitzpatrick | Son | — | 18 | ~1922 |
| Robert Fitzpatrick | Son | — | 9 | ~1931 |
| George Fitzpatrick | Head | — | 49 | ~1891 |
| Patrick Fitzpatrick | Son | — | 6 | ~1934 |
| George Fitzpatrick | Son | — | 22 | ~1918 |
| Margaret Fitzpatrick | Daughter | — | 24 | ~1916 |
| David Fitzpatrick | Son | — | 15 | ~1925 |
Census Appearances
1920
Cook, Illinois
Daughter, age 5
Cook, Illinois · implied b. ~1915 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fitzpatrick |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
Daughter, age 15
Cook, Illinois · implied b. ~1915 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fitzpatrick |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| 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
Daughter, age 24
Cook-County, Illinois · implied b. ~1916 — 8 household members
| Surname | Fitzpatrick |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| Industry | 0 |
| Highest Grade | Hs 4 |
| 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 Margaret Fitzpatrick across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Frank Fitzpatrick (~0.92 confidence) and father George Fitzpatrick (~0.92 confidence) and mother Irene Fitzpatrick (~0.92 confidence) and mother Margarita Fitzpatrick (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Frank Fitzpatrick
b. ~1884
Source father
● Household
· direct · ~0.92
Father
George Fitzpatrick
b. ~1891
Source father
● Household
· direct · ~0.92
Mother
Irene Fitzpatrick
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Margarita Fitzpatrick
b. ~1898
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Margaret Fitzpatrick
Daughter · 1940 · age 24 · b. ~1916 · Illinois
★ You are viewing this record
Sibling
Patrick Fitzpatrick
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Fitzpatrick
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edgar Fitzpatrick
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
David Fitzpatrick
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Fitzpatrick
Sibling · 1940 · age 22
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-t0627-00944-00630)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Donna Trolio | 1 | Daughter | — | Illinois |
| 2 | William Bingham | 39 | Head | Surface Line | Illinois |
| 3 | Margarita Bingham | 39 | Wife | — | Illinois |
| 4 | Richard Bingham | 19 | Son | Elevator | Illinois |
| 5 | Mary Bingham | 15 | Daughter | — | Illinois |
| 6 | George Fitzpatrick | 49 | Head | Automobiles | Illinois |
| 7 | Margarita Fitzpatrick | 42 | Wife | — | Illinois |
| 8 | Margaret Fitzpatrick THIS PERSON | 24 | Daughter | — | Illinois |
| 9 | George Fitzpatrick | 22 | Son | Boiler Maker | Illinois |
| 10 | Edgar Fitzpatrick | 18 | Son | — | Illinois |
| 11 | David Fitzpatrick | 15 | Son | — | Illinois |
| 12 | Robert Fitzpatrick | 9 | Son | — | Illinois |
| 13 | Patrick Fitzpatrick | 6 | Son | — | Illinois |
| 14 | Louis Bergmann | 36 | Head | W.P.A. Project | Illinois |
| 15 | Bernice Bergmann | 35 | Wife | — | Illinois |
| 16 | Jeanne Bergmann | 14 | Daughter | — | Illinois |
| 17 | Bernice Bergmann | 12 | Daughter | — | Illinois |
| 18 | Lois Bergmann | 7 | Daughter | — | Illinois |
| 19 | Robert Bergmann | 4 | Son | — | Illinois |
| 20 | James Bender | 35 | Head | Cartage | Illinois |
| 21 | Corinne Bender | 29 | Wife | — | Illinois |
| 22 | Margaret Considine | 65 | Head | Institution | Irish Free State |
| 23 | Constantine Semkus | 57 | Head | Wholesale Meat | Lithuania |
| 24 | Josephine Semkus | 54 | Wife | — | Lithuania |
| 25 | Frank Semkus | 25 | Son | Mill Wright | Connecticut |
| 26 | Louis Semkus | 21 | Son | Watch Maker | Connecticut |
| 27 | Edward Semkus | 12 | Son | — | Illinois |
| 28 | Ellen Mcmahon | 71 | Head | — | Massachusetts |
| 29 | John Mcmahon | 41 | Son | Dept. Streets | Illinois |
| 30 | Catherine Mcmahon | 38 | Daughter | City Hall | Illinois |
| 31 | Theresa Mcmahon | 12 | Daughter | — | Illinois |
| 32 | John Mcgrath | 40 | Head | Public Tavern | Illinois |
| 33 | Blanche Mcgrath | 37 | Wife | — | Illinois |
| 34 | John Mcgrath | 10 | Son | — | Illinois |
| 35 | William Mcgrath | 5 | Son | — | Illinois |
| 36 | Elizabeth Mcgrath | 5 | Daughter | — | Illinois |
| 37 | Michael Mcgrath | 3 | Son | — | Illinois |
| 38 | Joseph Loeffel | 77 | Head | — | Germany |
| 39 | Anna Loeffel | 48 | Daughter | Telephone | Illinois |
| 40 | Albert Loeffel | 46 | Son | Infirmary | Illinois |
Related Census Records
Search for Margaret Fitzpatrick
All Margaret Fitzpatrick Census Records Discover Fitzpatrick Family TreePedigree Summary
Margaret + 5 siblings
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)