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.~1924), then head of a 5-person household.
Age 16
b. ~1924
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Swanson |
| Given Name | Mary A |
| 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 | |
| Class of Worker | 0 |
| Highest Grade | S 8 |
| 1935 Residence | Same Place |
| 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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Margie Swanson | Daughter | — | 14 | ~1926 |
| Mary Swanson | Daughter | — | 16 | ~1924 |
| Robert Swanson | Son | — | 10 | ~1930 |
| Oscar Swanson | Head | — | 42 | ~1898 |
| Susan Swanson | Spouse | — | 48 | ~1892 |
Census Appearances
1930
Cook, Illinois
Daughter, age 6
Cook, Illinois · implied b. ~1924 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Swanson |
| Given Name | Marie |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 16
Cook-County, Illinois · implied b. ~1924 — 5 household members
| Surname | Swanson |
| Given Name | Mary A |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Class of Worker | 0 |
| Highest Grade | S 8 |
| 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 16 · b. ~1924 · Illinois
★ You are viewing this record
Sibling
Robert Swanson
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margie Swanson
Sibling · 1940 · age 14
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-t0627-00976-00762)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Robert Long | 15 | Grandchild | — | Iowa |
| 42 | Alice Long | 13 | Grandchild | — | Iowa |
| 43 | Oscar Carlson | 53 | Lodger | Moulder | Sweden |
| 44 | Mary R Cunningham | 65 | Head | — | Illinois |
| 45 | John Cunningham | 26 | Son | Mail Clerk | Illinois |
| 46 | William J Brown | 54 | Head | Watchman | Wisconsin |
| 47 | Julia Brown | 37 | Wife | — | Illinois |
| 48 | Albert O Abbe | 60 | Head | — | Illinois |
| 49 | Benjamin Hush | 43 | Roomer | Salesman | Pennsylvania |
| 50 | John G Zumstein | 46 | Head | Milk Driver | Pennsylvania |
| 51 | Mary D Zumstein | 44 | Wife | — | Pennsylvania |
| 52 | Jess Zumstein | 40 | Brother | Milk Driver | Pennsylvania |
| 53 | Lorraine M Zumstein | 38 | Sister-in-law | — | Illinois |
| 54 | William Zumstein | 13 | Nephew | — | Illinois |
| 55 | Albert Zumstein | 13 | Nephew | — | Illinois |
| 56 | Oscar Solv Swanson | 42 | Head | Painter | Illinois |
| 57 | Susan M Swanson | 48 | Wife | — | Illinois |
| 58 | Mary A Swanson THIS PERSON | 16 | Daughter | — | Illinois |
| 59 | Margie D Swanson | 14 | Daughter | — | Illinois |
| 60 | Robert C Swanson | 10 | Son | — | Illinois |
| 61 | Ernest F Dodson | 41 | Head | Plumber | Oklahoma |
| 62 | Gertie P Dodson | 42 | Wife | — | Texas |
| 63 | Margaret F Dodson | 20 | Daughter | Credit Clerk | Oklahoma |
| 64 | Kenneth L Dodson | 19 | Son | Printer | Oklahoma |
| 65 | Robert R Mcclement | 43 | Head | Fireman | Canada |
| 66 | Isabelle B Mcclement | 42 | Wife | — | Scotland |
| 67 | Robert Jr. Mcclement | 22 | Son | Laborer | Canada |
| 68 | George Mcclement | 19 | Son | New Worker | Canada |
| 69 | Charles Mcclement | 12 | Son | — | Illinois |
| 70 | James B Butler | 35 | Head | Electrician | Wisconsin |
| 71 | Maria M Butler | 34 | Wife | — | Illinois |
| 72 | James Jr. Butler | 15 | Son | — | Indiana |
| 73 | Richard Butler | 11 | Son | — | Illinois |
| 74 | John Butler | 9 | Son | — | Illinois |
| 75 | Shirley Butler | 7 | Daughter | — | Illinois |
| 76 | George C Guptill | 42 | Head | Machinist | Illinois |
| 77 | Loretta O Guptill | 53 | Wife | — | Michigan |
| 78 | George R Guptill | 18 | Son | Laborer | Illinois |
| 79 | Norman E Tonietti | 20 | Son-in-law | Sales Clerk | Wisconsin |
| 80 | Ruth Tonietti | 19 | Daughter | Waitress | 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)