HL
Helen Lynch — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Helen Lynch across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Thomas & Thomas — first a daughter (b.~1916), then head of a 4-person household.
Age 24
b. ~1916
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Lynch |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Stenographer |
| Industry | Railroad |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 960 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Stenographer |
| Township / Ward | Chicago City |
| 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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Helen | Age | Birth yr |
|---|---|---|---|---|
| Nellie Lynch | Spouse | — | 59 | ~1881 |
| Thomas Lynch | Head | — | 64 | ~1876 |
| Robert Lynch | Son | — | 32 | ~1908 |
| Helen Lynch | Daughter | — | 24 | ~1916 |
Census Appearances
1920
Cook, Illinois
Daughter, age 4
Cook, Illinois · implied b. ~1916 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lynch |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| 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 |
1930
Cook, Illinois
Daughter, age 14
Cook, Illinois · implied b. ~1916 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lynch |
| Given Name | Helen D. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| 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 — 4 household members
| Surname | Lynch |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Stenographer |
| Industry | Railroad |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 960 |
| Highest Grade | H 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 Helen Lynch across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Thomas Lynch (~0.92 confidence) and father Thomas Lynch (~0.92 confidence) and mother Nellie Lynch (~0.92 confidence) and mother Nellie Lynch (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Thomas Lynch
b. ~1877
Source father
● Household
· direct · ~0.92
Father
Thomas Lynch
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Nellie Lynch
b. ~1881
Source mother
● Household
· direct · ~0.92
Mother
Nellie Lynch
b. ~1882
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Helen Lynch
Daughter · 1940 · age 24 · b. ~1916 · Illinois
★ You are viewing this record
Sibling
Robert Lynch
Sibling · 1940 · age 32
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-t0627-00936-00067)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Thomas B Bondue | 47 | Head | Surgeon | Iowa |
| 42 | Astrid Bondue | 42 | Wife | — | Sweden |
| 43 | Thomas Bondue | 13 | Son | — | Illinois |
| 44 | Jack Bondue | 11 | Son | — | Illinois |
| 45 | Ray Bondue | 10 | Daughter | — | Illinois |
| 46 | John P Mellis | 55 | Head | Restaurant | Scotland |
| 47 | Elizabeth Mellis | 52 | Wife | Helper | Illinois |
| 48 | Nellie Pyne | 64 | Sister-in-law | — | Illinois |
| 49 | Mary B Pyne | 60 | Sister-in-law | — | Illinois |
| 50 | Margaret Pyne | 55 | Sister-in-law | Secretary | Illinois |
| 51 | Arkell M Vaughn | 44 | Head | Surgeon | Illinois |
| 52 | Margaret M Vaughn | 44 | Wife | — | Illinois |
| 53 | Jack R Vaughn | 13 | Son | — | Illinois |
| 54 | Catherine Hager | 27 | Maid | Housework | Illinois |
| 55 | William Ruberry | 49 | Head | City Fireman | Illinois |
| 56 | Margaret Ruberry | 41 | Wife | — | Illinois |
| 57 | William Ruberry | 12 | Son | — | Illinois |
| 58 | Jack Ruberry | 8 | Son | — | Illinois |
| 59 | Helen Ruberry | 7 | Daughter | — | Illinois |
| 60 | Regina Ruberry | 2 | Daughter | — | Illinois |
| 61 | Guy Richards | 51 | Head | Assistant Superintendent | Michigan |
| 62 | Myrl Richards | 49 | Wife | — | Michigan |
| 63 | Phyllis Richards | 20 | Daughter | — | Michigan |
| 64 | Wayne Richards | 14 | Son | — | Ohio |
| 65 | John P Riordan | 51 | Head | Foreman | Illinois |
| 66 | Olga E Riordan | 53 | Wife | — | Sweden |
| 67 | Patrick J O'Brien | 15 | Nephew | — | Illinois |
| 68 | James Marchbank | 33 | Head | Building Contractor | Minnesota |
| 69 | Dorothy Marchbank | 33 | Wife | — | Oklahoma |
| 70 | Marjorie Marchbank | 9 | Daughter | — | Kansas |
| 71 | James Jr Marchbank | 4 | Son | — | Illinois |
| 72 | Frederick Kant | 59 | Head | Waiter | Germany |
| 73 | Ella Kant | 61 | Wife | — | Ireland |
| 74 | Gerald Costello | 26 | Son-in-law | Driver | Illinois |
| 75 | Catherine Costello | 23 | Daughter | Stenographer | Illinois |
| 76 | Thomas F Lynch | 64 | Head | 26 | Illinois |
| 77 | Nellie M Lynch | 59 | Wife | — | Illinois |
| 78 | Robert Lynch | 32 | Son | Bartender | Illinois |
| 79 | Helen Lynch THIS PERSON | 24 | Daughter | Stenographer | Illinois |
| 80 | James H Campbell | 38 | Head | Dept Manager | Illinois |
Related Census Records
Pedigree Summary
Helen + 1 sibling
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)