JF
Joseph Fitzgerald — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Joseph Fitzgerald across the 1910, 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Edward & James — first a head (b.~1904), then head of a 7-person household.
Age 36
b. ~1904
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Fitzgerald |
| Given Name | Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Policeman |
| Industry | City |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 604 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Policeman |
| Township / Ward | Chicago |
| Est. Birth Year | ~1904 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Joseph | Age | Birth yr |
|---|---|---|---|---|
| Margaret Marnane | Other | — | 30 | ~1910 |
| Joseph Fitzgerald | Head | — | 36 | ~1904 |
| Eileen Fitzgerald | Daughter | — | 12 | ~1928 |
| Edward Fitzgerald | Son | — | 7 | ~1933 |
| Nellie Marnane | Other | — | 60 | ~1880 |
| Patricia Fitzgerald | Daughter | — | 13 | ~1927 |
| Mary Fitzgerald | Spouse | — | 36 | ~1904 |
Census Appearances
1910
Cook, Illinois
Son, age 5
Cook, Illinois · implied b. ~1905 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fitzgerald |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| 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 |
1920
Cook, Illinois
Son, age 16
Cook, Illinois · implied b. ~1904 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fitzgerald |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | New York |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 27
Cook, Illinois · implied b. ~1903 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fitzgerald |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | New York |
| Mother's Birthplace | Illinois |
| Occupation | Helper |
| Industry | Truck |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 36
Cook-County, Illinois · implied b. ~1904 — 7 household members
| Surname | Fitzgerald |
| Given Name | Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Occupation | Policeman |
| Industry | City |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 604 |
| 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 Joseph Fitzgerald across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Edward Fitzgerald (~0.92 confidence) and father James Fitzgerald (~0.92 confidence) and father James Fitzgerald (~0.92 confidence) and mother Margaret Fitzgerald (~0.92 confidence) and mother Nellie Fitzgerald (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Edward Fitzgerald
b. ~1868
Source father
● Household
· direct · ~0.92
Father
James Fitzgerald
b. ~1872
Source father
● Household
· direct · ~0.92
Father
James Fitzgerald
b. ~1869
Source father
● Household
· direct · ~0.92
Mother
Margaret Fitzgerald
b. ~1873
Source mother
● Household
· direct · ~0.92
Mother
Nellie Fitzgerald
b. ~1869
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Joseph Fitzgerald
Head · 1940 · age 36 · b. ~1904 · 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-t0627-00958-00900)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | J. Howard Hacker | 37 | Head | Struct Engineer | Michigan |
| 2 | B. Frances Hacker | 37 | Wife | — | Indiana |
| 3 | A. Jean Hacker | 17 | Daughter | — | Indiana |
| 4 | L. Marilyn Hacker | 13 | Daughter | — | Indiana |
| 5 | J. Richard Mcnamara | 35 | Head | — | Irish Free State |
| 6 | Mary Mcnamara | 66 | Mother | — | Irish Free State |
| 7 | Morgan Mcnamara | 32 | Brother | Laborer | Irish Free State |
| 8 | Mary Mcnamara | 28 | Sister | — | Irish Free State |
| 9 | Frances Mcnamara | 26 | Sister | Clerk | Irish Free State |
| 10 | Nora Herbert | 67 | Head | — | Irish Free State |
| 11 | Marie Herbert | 34 | Daughter | — | Illinois |
| 12 | Joseph Fitzgerald THIS PERSON | 36 | Head | Policeman | Illinois |
| 13 | Mary Fitzgerald | 36 | Wife | — | Illinois |
| 14 | Patricia Fitzgerald | 13 | Daughter | — | Illinois |
| 15 | Eileen Fitzgerald | 12 | Daughter | — | Illinois |
| 16 | Edward Fitzgerald | 7 | Son | — | Illinois |
| 17 | Nellie Marnane | 60 | Mother in law | — | Irish Free State |
| 18 | Margaret Marnane | 30 | Sister in law | Clerk | Illinois |
| 19 | Michael O'Connell | 69 | Head | Mgr Station | Illinois |
| 20 | Margaret O'Connell | 65 | Wife | — | Illinois |
| 21 | Alice O'Connell | 27 | Daughter | Clerk | Illinois |
| 22 | John O'Connell | 22 | Son | — | Illinois |
| 23 | Lorretta Megan | 18 | Lodger | — | Illinois |
| 24 | Michael Conway | 62 | Head | — | Illinois |
| 25 | Ellen Conway | 58 | Wife | — | Illinois |
| 26 | Mary Conway | 30 | Daughter | Cashier | Illinois |
| 27 | Thomas Conway | 26 | Son | Office | Illinois |
| 28 | Winifred Conway | 25 | Daughter | Secretary | Illinois |
| 29 | Rita Conway | 18 | Daughter | — | Illinois |
| 30 | Michael Jr. Conway | 17 | Son | — | Illinois |
| 31 | J. John Boland | 41 | Head | Cashier | Illinois |
| 32 | Myra Boland | 38 | Wife | — | Wisconsin |
| 33 | H. William Durkin | 68 | Head | Salesman | Irish Free State |
| 34 | Mary Durkin | 63 | Wife | — | Illinois |
| 35 | Marcella Durkin | 37 | Daughter | Worker | Illinois |
| 36 | A. Percy Lythberg | 46 | Head | Supt Sales | Illinois |
| 37 | Josephine Lythberg | 46 | Wife | — | Sweden |
| 38 | William Lythberg | 12 | Son | — | Illinois |
| 39 | Richard Lythberg | 10 | Son | — | Illinois |
| 40 | Mother Annette | None | F | — | — |
Pedigree Summary
Joseph
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)