ME
Mary Egan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Egan across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents William & Robert — first a daughter (b.~1919), then head of a 9-person household.
Age 21
b. ~1919
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Egan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | New Worker |
| Class of Worker | 0 |
| Hours Worked | 65 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | New Worker |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1919 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Margaret Egan | Daughter | — | 15 | ~1925 |
| Edward Egan | Son | — | 17 | ~1923 |
| Mary Egan | Spouse | — | 54 | ~1886 |
| Helen Egan | Daughter | — | 14 | ~1926 |
| Mary Egan | Daughter | — | 21 | ~1919 |
| William Egan | Son | — | 18 | ~1922 |
| Rita Egan | Daughter | — | 7 | ~1933 |
| John Egan | Son | — | 26 | ~1914 |
| William Egan | Head | — | 63 | ~1877 |
Census Appearances
1920
Cook, Illinois
Daughter, age
Cook, Illinois · implied b. ~1920 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Egan |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| 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
Daughter, age 11
Cook, Illinois · implied b. ~1919 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Egan |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| 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 21
Cook-County, Illinois · implied b. ~1919 — 9 household members
| Surname | Egan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | New Worker |
| Class of Worker | 0 |
| Hours Worked | 65 |
| Highest Grade | Hs 4 |
| 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 Mary Egan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Egan (~0.92 confidence) and father Robert Egan (~0.92 confidence) and mother Mary Egan (~0.92 confidence) and mother Alice Egan (~0.92 confidence) and father S Egan (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Egan
b. ~1877
Source father
● Household
· direct · ~0.92
Father
Robert Egan
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Mary Egan
b. ~1886
Source mother
● Household
· direct · ~0.92
Mother
Alice Egan
b. ~1895
Source mother
● Household
· direct · ~0.92
Father
S Egan
b. ~1895
Source father
● Household
· direct · ~0.92
This person
Anchor record
Mary Egan
Daughter · 1940 · age 21 · b. ~1919 · Illinois
★ You are viewing this record
Sibling
Edward Egan
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rita Egan
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Egan
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Egan
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Egan
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Egan
Sibling · 1940 · age 18
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-t0627-00952-00292)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Robert Heaton | 14 | Son | — | Illinois |
| 2 | Beverly Heaton | 8 | Daughter | — | Illinois |
| 3 | Charles Heaton | 4 | Daughter | — | Illinois |
| 4 | William Egan | 63 | Head | Policeman | Illinois |
| 5 | Mary Egan | 54 | Wife | — | Illinois |
| 6 | John Egan | 26 | Son | Special Agent | Illinois |
| 7 | Mary Egan THIS PERSON | 21 | Daughter | New Worker | Illinois |
| 8 | William Egan | 18 | Son | — | Illinois |
| 9 | Edward Egan | 17 | Son | — | Illinois |
| 10 | Margaret Egan | 15 | Daughter | — | Illinois |
| 11 | Helen Egan | 14 | Daughter | — | Illinois |
| 12 | Rita Egan | 7 | Daughter | — | Illinois |
| 13 | Nicholas Weingert | 45 | Head | Electric Welder | Illinois |
| 14 | Ella Weingert | 37 | Wife | — | Illinois |
| 15 | Nicholas Weingert | 11 | Son | — | Illinois |
| 16 | Norman Weingert | 0 | Son | — | Illinois |
| 17 | Mary E. Moorman | 50 | Head | — | Illinois |
| 18 | Thomas Moorman | 24 | Son | Navy Active Duties | Illinois |
| 19 | John Sullivan | 50 | Head | Mail Carrier | Illinois |
| 20 | Mabel Sullivan | 48 | Wife | — | Illinois |
| 21 | Gladys Sullivan | 16 | Daughter | — | Illinois |
| 22 | Lorraine Sullivan | 13 | Daughter | — | Illinois |
| 23 | Mary Cornick | 83 | Mother-in-law | — | Free State |
| 24 | Cornelius Mahoney | 56 | Head | Engineer | Eire - Ireland |
| 25 | Delia Mahoney | 60 | Wife | — | Eire - Ireland |
| 26 | Mary Mahoney | 21 | Daughter | Bookkeeping | Illinois |
| 27 | Cornelius Mahoney | 18 | Son | Office Boy | Illinois |
| 28 | Edward Pope | 56 | Head | Accountant | Illinois |
| 29 | Mary Pope | 56 | Wife | — | Illinois |
| 30 | Elizabeth Pope | 31 | Daughter | Office Work | Illinois |
| 31 | Herbert Lees | 51 | Head | Electrician | England |
| 32 | Ethel Lees | 46 | Wife | — | Illinois |
| 33 | Mary Lees | 23 | Daughter | Service Repr. | Illinois |
| 34 | Jack Lees | 17 | Son | — | Illinois |
| 35 | Lotta Fryer | 40 | Lodger | Office Work | Nebraska |
| 36 | Gertrude O'Leary | 52 | Head | — | Illinois |
| 37 | James O'Leary | 29 | Son | Office Work | Illinois |
| 38 | Geraldine O'Leary | 28 | Daughter | Grd. Day Operator | Illinois |
| 39 | Laura Jean O'Leary | 21 | Daughter | New Worker | Illinois |
| 40 | Richard O'Leary | 13 | Son | — | Illinois |
Related Census Records
Pedigree Summary
Mary + 6 siblings
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)