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Margaret Lyons — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Margaret Lyons across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1924), then head of a 10-person household.
Age 16
b. ~1924
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Lyons |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Highest Grade | H 3 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago |
| Est. Birth Year | ~1924 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| Mary Lyons | Spouse | — | 47 | ~1893 |
| Jerry Lyons | Head | — | 56 | ~1884 |
| Catherine Lyons | Daughter | — | 10 | ~1930 |
| Helen Lyons | Daughter | — | 12 | ~1928 |
| Theresa Lyons | Daughter | — | 5 | ~1935 |
| Mary Lyons | Daughter | — | 14 | ~1926 |
| Rita Lyons | Daughter | — | 8 | ~1932 |
| John Lyons | Son | — | 18 | ~1922 |
| James Lyons | Son | — | 19 | ~1921 |
| Margaret Lyons | Daughter | — | 16 | ~1924 |
Census Appearances
1930
Cook, Illinois
Daughter, age 7
Cook, Illinois · implied b. ~1923 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lyons |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 16
Cook-County, Illinois · implied b. ~1924 — 10 household members
| Surname | Lyons |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Highest Grade | H 3 |
| 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 Margaret Lyons across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Margaret Lyons
Daughter · 1940 · age 16 · b. ~1924 · Illinois
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Sibling
Rita Lyons
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Lyons
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Lyons
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Lyons
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Theresa Lyons
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Lyons
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Lyons
Sibling · 1940 · age 12
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-t0627-00950-00692)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Josephine Lyons | 12 | Son | — | Illinois |
| 2 | Jerry Lyons | 56 | Head | Laborer | Ireland |
| 3 | Mary Lyons | 47 | Wife | — | Ireland |
| 4 | James Lyons | 19 | Son | Engineer Helper | Illinois |
| 5 | John Lyons | 18 | Son | Laborer | Illinois |
| 6 | Margaret Lyons THIS PERSON | 16 | Daughter | — | Illinois |
| 7 | Mary Lyons | 14 | Daughter | — | Illinois |
| 8 | Helen Lyons | 12 | Daughter | — | Illinois |
| 9 | Catherine Lyons | 10 | Daughter | — | Illinois |
| 10 | Rita Lyons | 8 | Daughter | — | Illinois |
| 11 | Theresa Lyons | 5 | Daughter | — | Illinois |
| 12 | Thomas Hill | 42 | Head | Laborer | Illinois |
| 13 | Mary Hill | 68 | Wife | — | Alabama |
| 14 | Frank Berger | 60 | Head | Brick Layer | Austria |
| 15 | Josephine Berger | 57 | Wife | — | Austria |
| 16 | John Berger | 25 | Son | Freight Router | Illinois |
| 17 | Edward Reyer | 27 | Head | Laborer | Illinois |
| 18 | Mary Reyer | 22 | Wife | Bench Worker | Illinois |
| 19 | Here Ends | None | Block | — | — |
| 20 | John Broach | 71 | Head | — | Austria |
| 21 | Caroline Broach | 70 | Wife | — | Germany |
| 22 | Hermine Broach | 30 | Daughter | Office Work | Illinois |
| 23 | Thomas Stack | 52 | Head | Laborer | New York |
| 24 | Catherine Stack | 52 | Wife | — | Illinois |
| 25 | Michael Stack | 23 | Son | Laborer | Illinois |
| 26 | Catherine Stack | 20 | Daughter | New Worker | Illinois |
| 27 | Mary Stack | 17 | Daughter | New Worker | Illinois |
| 28 | John Stack | 15 | Son | — | Illinois |
| 29 | Patrick Stack | 11 | Son | — | Illinois |
| 30 | Nora Casey | 56 | Head | — | Ireland |
| 31 | John Casey | 21 | Son | Order Packer | Illinois |
| 32 | James Casey | 25 | Son | Drill Press Operator | Illinois |
| 33 | Leo Balding | 45 | Head | Mechanic Helper | Illinois |
| 34 | Pearl Balding | 40 | Wife | — | Illinois |
| 35 | Virgil Balding | 20 | Son | Laborer | Illinois |
| 36 | Elmer Balding | 17 | Son | — | Illinois |
| 37 | Dorothy Balding | 14 | Daughter | — | Illinois |
| 38 | Virginia Balding | 13 | Daughter | — | Illinois |
| 39 | Margaret Laley | 33 | Head | Secretary | Illinois |
| 40 | Thomas Laley | 8 | Son | — | Illinois |
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)