ML
Margaret Lynch — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Margaret Lynch across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Thomas & John — first a daughter (b.~1917), then head of a 5-person household.
Age 23
b. ~1917
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Lynch |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Operator |
| Industry | Telephone |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1000 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Operator |
| Township / Ward | Chicago |
| Est. Birth Year | ~1917 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| Margaret Lynch | Daughter | — | 23 | ~1917 |
| John Lynch | Head | — | 51 | ~1889 |
| William Lynch | Son | — | 20 | ~1920 |
| Lawrence Lynch | Son | — | 10 | ~1930 |
| Hanna Lynch | Spouse | — | 50 | ~1890 |
Census Appearances
1920
Cook, Illinois
Daughter, age 3
Cook, Illinois · implied b. ~1917 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lynch |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | No |
| Can Write | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Daughter, age 13
Cook, Illinois · implied b. ~1917 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lynch |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| 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 23
Cook-County, Illinois · implied b. ~1917 — 5 household members
| Surname | Lynch |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Occupation | Operator |
| Industry | Telephone |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1000 |
| 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 Margaret 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 John Lynch (~0.92 confidence) and mother Minnie Lynch (~0.92 confidence) and mother Hanna Lynch (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Thomas Lynch
b. ~1887
Source father
● Household
· direct · ~0.92
Father
John Lynch
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Minnie Lynch
b. ~1889
Source mother
● Household
· direct · ~0.92
Mother
Hanna Lynch
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Margaret Lynch
Daughter · 1940 · age 23 · b. ~1917 · Illinois
★ You are viewing this record
Sibling
William Lynch
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lawrence Lynch
Sibling · 1940 · age 10
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-t0627-00952-00019)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Harry Burns | 49 | Head | — | Canada-Eng |
| 42 | Catherine Burns | 44 | Wife | — | Unknown |
| 43 | Sophie Burns | 22 | Daughter | Sales Lady | Illinois |
| 44 | Ellen Burns | 21 | Daughter | Packer York | Illinois |
| 45 | Frank Vasilus | 35 | Head | Printer | Illinois |
| 46 | Anna Vasilus | 35 | Wife | — | Illinois |
| 47 | Caroline Antanaitis | 57 | Mother | — | Lithuania |
| 48 | John Lynch | 51 | Head | Switchman | Illinois |
| 49 | Hanna Lynch | 50 | Wife | — | Ireland |
| 50 | Margaret Lynch THIS PERSON | 23 | Daughter | Operator | Illinois |
| 51 | William Lynch | 20 | Son | Delivery-Boy | Illinois |
| 52 | Lawrence Lynch | 10 | Son | — | Illinois |
| 53 | Joseph Thrill | 37 | Head | Laborer | Illinois |
| 54 | Martha Thrill | 33 | Wife | Nurse | Illinois |
| 55 | Joseph Thrill | 1 | Son | — | Illinois |
| 56 | Marie Thrill | 70 | Mother | — | Germany |
| 57 | Mary Riedle | 58 | Head | — | Pennsylvania |
| 58 | Ruby Riedle | None | Bernhard | 40 | No 8 |
| 59 | Margaret Riedle | 33 | Daughter | — | Illinois |
| 60 | Robert Riedle | 14 | Grandson | — | Illinois |
| 61 | Donna Riedle | 10 | Granddaughter | — | Illinois |
| 62 | Constance Kozlowski | 67 | Head | — | Poland |
| 63 | Clara Kozlowski | 35 | Daughter | Bank Clerk | Illinois |
| 64 | Charles Cryner | 38 | Head | Laborer | Illinois |
| 65 | Edith Cryner | 40 | Wife | — | Illinois |
| 66 | Robert Cryner | 16 | Son | — | Illinois |
| 67 | Irene Cryner | 14 | Daughter | — | Illinois |
| 68 | Harry Hahner | 31 | Head | Photo Engraver | Illinois |
| 69 | Eleanor Hahner | 38 | Wife | — | Illinois |
| 70 | Diana Hahner | 12 | Daughter | — | Illinois |
| 71 | Ralph Bonde | 29 | Head | Office Clerk | Illinois |
| 72 | Lulu Bonde | 31 | Wife | — | Illinois |
| 73 | David Bonde | 2 | Son | — | Illinois |
| 74 | Jas Mcginnis | 41 | Head | Usher | Illinois |
| 75 | Jeanette Mcginnis | 38 | Wife | — | Illinois |
| 76 | Genevieve Mcginnis | 15 | Daughter | — | Illinois |
| 77 | Anton Mazak | 51 | Head | Butcher | Lithuania |
| 78 | Elizabeth Mazak | 43 | Wife | — | Illinois |
| 79 | Lorretta Mazak | 17 | Daughter | — | Illinois |
| 80 | Raymond Mazak | 15 | Son | — | Illinois |
Pedigree Summary
Margaret + 2 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)