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Margaret Mclean — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Margaret Mclean across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1922), then head of a 8-person household.
Age 18
b. ~1922
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | McLean |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | New Worker |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | New Worker |
| Township / Ward | Chicago |
| Est. Birth Year | ~1922 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| Beatrice Mclean | Spouse | — | 40 | ~1900 |
| Margaret Mclean | Daughter | — | 18 | ~1922 |
| Beatrice Mclean | Daughter | — | 16 | ~1924 |
| Edward Mclean | Son | — | 12 | ~1928 |
| James Mclean | Head | — | 44 | ~1896 |
| Ursula Mclean | Daughter | — | 7 | ~1933 |
| Douglas Mclean | Son | — | 9 | ~1931 |
| Thomas Mclean | Son | — | 14 | ~1926 |
Census Appearances
1930
Cook, Illinois
Daughter, age 8
Cook, Illinois · implied b. ~1922 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McLean |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 8 |
| 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 18
Cook-County, Illinois · implied b. ~1922 — 8 household members
| Surname | McLean |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Occupation | New Worker |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | H 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 Margaret Mclean across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Margaret Mclean
Daughter · 1940 · age 18 · b. ~1922 · Illinois
★ You are viewing this record
Sibling
Edward Mclean
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Beatrice Mclean
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Douglas Mclean
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Mclean
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ursula Mclean
Sibling · 1940 · age 7
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-t0627-00953-00411)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charles Healey | 68 | Head | — | Irish Free |
| 2 | Mary Healey | 18 | Wife | — | Irish Free |
| 3 | Thomas Healey | 36 | Son | Street Prog. | Illinois |
| 4 | Thomas Hagadon | 69 | Head | Grocery | Denmark |
| 5 | Alma Hagadon | 51 | Wife | — | Norway |
| 6 | Herbert Mccue | 33 | Head | Fireman | Illinois |
| 7 | Mary Mccue | 31 | Wife | — | Illinois |
| 8 | Margaret Mccue | 11 | Daughter | — | Illinois |
| 9 | Marian Mccue | 9 | Daughter | — | Illinois |
| 10 | Thomas Mccue | 6 | Son | — | Illinois |
| 11 | Patricia Mccue | 3 | Daughter | — | Illinois |
| 12 | Louis Mccue | 0 | Son | — | Illinois |
| 13 | Mary Hatzel | 53 | Head | — | Austria |
| 14 | Joseph Ribich | 70 | Lodger | Saw Filer | Jugo Slavia |
| 15 | John Jederez | 30 | Lodger | Moulder | Illinois |
| 16 | Max Burghardt | 61 | Head | Brewer | Germany |
| 17 | Wilma Burghardt | 27 | Daughter | — | Illinois |
| 18 | Chris O'Brien | 48 | Head | — | Irish Free |
| 19 | Freda O'Brien | 47 | Wife | — | Indiana |
| 20 | Steve Uhuslerck|Uhuslerik | 54 | Head | Laborer | Poland |
| 21 | Mary Uhuslerck|Uhuslerik | 45 | Wife | — | Poland |
| 22 | Gertrude Uhuslerck|Uhuslerik | 24 | Daughter | Factory Work | Illinois |
| 23 | Eveline Uhuslerck|Uhuslerik | 21 | Daughter | Packer | Illinois |
| 24 | Joseph Uhuslerck|Uhuslerik | 9 | Son | — | Illinois |
| 25 | Harry Kaefer | 51 | Head | Chauffeur | Illinois |
| 26 | Alice Kaefer | 41 | Wife | — | Illinois |
| 27 | Bernice Kaefer | 18 | Daughter | New Worker | Illinois |
| 28 | Margaret Kaefer | 16 | Daughter | — | Illinois |
| 29 | Allen Kaefer | 14 | Daughter | — | Illinois |
| 30 | Jaceline Kaefer | 12 | Daughter | — | Illinois |
| 31 | Harry Jr Kaefer | 9 | Son | — | Illinois |
| 32 | Mary Kaefer | 77 | Mother | — | Illinois |
| 33 | James Mclean | 44 | Head | Chauffeur | Illinois |
| 34 | Beatrice Mclean | 40 | Wife | — | Illinois |
| 35 | Margaret Mclean THIS PERSON | 18 | Daughter | New Worker | Illinois |
| 36 | Beatrice Mclean | 16 | Daughter | — | Illinois |
| 37 | Thomas Mclean | 14 | Son | — | Illinois |
| 38 | Edward Mclean | 12 | Son | — | Illinois |
| 39 | Douglas Mclean | 9 | Son | — | Illinois |
| 40 | Ursula Mclean | 7 | Daughter | — | 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)