MS
Mary Swanson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Swanson across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 7-person household.
Age 11
b. ~1929
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Swanson |
| Given Name | Mary Lou |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | CHICAGO |
| 1935 Residence (County) | COOK |
| Additional Details | |
| Highest Grade | Hs 5 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago |
| Est. Birth Year | ~1929 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Roy Swanson | Head | — | 51 | ~1889 |
| Earl Swanson | Son | — | 19 | ~1921 |
| Mary Swanson | Daughter | — | 11 | ~1929 |
| Pearl Swanson | Daughter | — | 17 | ~1923 |
| Marie Swanson | Daughter | — | 21 | ~1919 |
| Maude Swanson | Spouse | — | 45 | ~1895 |
| Gloria Swanson | Daughter | — | 13 | ~1927 |
Census Appearances
1930
Cook, Illinois
Daughter, age 1
Cook, Illinois · implied b. ~1929 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Swanson |
| Given Name | Mary Lou |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Wisconsin |
| Occupation | none |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 11
Cook-County, Illinois · implied b. ~1929 — 7 household members
| Surname | Swanson |
| Given Name | Mary Lou |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | CHICAGO |
| 1935 Residence (County) | COOK |
| Highest Grade | Hs 5 |
| 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 Mary Swanson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Swanson
Daughter · 1940 · age 11 · b. ~1929 · Illinois
★ You are viewing this record
Sibling
Gloria Swanson
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marie Swanson
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Earl Swanson
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Pearl Swanson
Sibling · 1940 · age 17
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-t0627-00933-00819)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Anna Baumgart | 51 | Wife | — | Germany |
| 42 | Edward Baumgart | 27 | Son | Butcher | Illinois |
| 43 | Lloyd A Anderson | 38 | Head | Metal Finisher | Nebraska |
| 44 | Dora V Anderson | 39 | Wife | — | Iowa |
| 45 | Devon L Anderson | 5 | Son | — | Illinois |
| 46 | Leroy E Wootton | 48 | Head | Burner | Illinois |
| 47 | Jessie Wootton | 36 | Wife | — | Mississippi |
| 48 | Dorothy A Wootton | 11 | Daughter | — | Illinois |
| 49 | Edward B Wootton | 10 | Son | — | Illinois |
| 50 | James H Shields | 70 | Head | Paving Engineer | Illinois |
| 51 | Pearl Shields | 65 | Wife | — | Illinois |
| 52 | Edward B Seybold | 72 | Head | Decorator | Indiana |
| 53 | Hattie Seybold | 68 | Wife | — | Mississippi |
| 54 | John J O'Rourke | 65 | Head | Watchman | Scotland |
| 55 | Margaret O'Rourke | 61 | Wife | — | Illinois |
| 56 | Russell J O'Rourke | 18 | Son | — | Illinois |
| 57 | Alfreda Harding | 46 | Head | — | Florida |
| 58 | Frederick Mckenzie | 15 | Son | — | Illinois |
| 59 | Calvin E Mckenzie | 13 | Son | — | Illinois |
| 60 | John Mckenzie | 17 | Son | — | Illinois |
| 61 | Arthur Torsdahl | 36 | Head | Motorman | Iowa |
| 62 | Dorothy Torsdahl | 32 | Wife | — | Canada Eng |
| 63 | Lorraine Torsdahl | 7 | Daughter | — | Illinois |
| 64 | Dallas J Torsdahl | 5 | Daughter | — | Illinois |
| 65 | Roy W Swanson | 51 | Head | Machinist | Illinois |
| 66 | Maude E Swanson | 45 | Wife | — | Illinois |
| 67 | Marie Swanson | 21 | Daughter | Post Clerk | Illinois |
| 68 | Earl B Swanson | 19 | Son | — | Illinois |
| 69 | Pearl M Swanson | 17 | Daughter | — | Illinois |
| 70 | Gloria Swanson | 13 | Daughter | — | Illinois |
| 71 | Mary Lou Swanson THIS PERSON | 11 | Daughter | — | Illinois |
| 72 | Charles E Geisler | 48 | Head | Grocer | Ohio |
| 73 | Mary B Geisler | 49 | Wife | — | Ohio |
| 74 | Edna May Geisler | 19 | Daughter | Clerk | Illinois |
| 75 | Joseph Geisler | 15 | Son | — | Illinois |
| 76 | Charles Jr Geisler | 43 | Son | — | Illinois |
| 77 | Joseph Mageau | 63 | Lodger | — | Conn |
| 78 | Jennie Mageau | 64 | Lodger Wife | — | Ohio |
| 79 | Katie Witham | 67 | Head | — | Illinois |
| 80 | Fred S Welsh | 36 | Nephew | Truck Driver | 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)