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Mary Larson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Larson across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1878), then head of a 3-person household.
Age 62
b. ~1878
Female
Spouse
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Larson |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | S 8 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago |
| Est. Birth Year | ~1878 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| John Larson | Head | — | 69 | ~1871 |
| Robert Larson | Son | — | 33 | ~1907 |
| Mary Larson | Spouse | — | 62 | ~1878 |
Census Appearances
1920
Cook, Illinois
Other, age 41
Cook, Illinois · implied b. ~1879 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larsen |
| Given Name | Mary |
| Relationship to Head | Aunt |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
Spouse, age 53
Cook, Illinois · implied b. ~1877 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larsen |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 18 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Spouse, age 62
Cook-County, Illinois · implied b. ~1878 — 3 household members
| Surname | Larson |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Income (1939) | 0 |
| Highest Grade | S 8 |
| 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 Mary Larson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Larson
Spouse · 1940 · age 62 · b. ~1878 · Illinois
★ You are viewing this record
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-t0627-00957-00202)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Charles Parras | 37 | Head | Proprietor | Greece |
| 42 | Mary Parras | 27 | Wife | — | Illinois |
| 43 | Ernestine Parras | 8 | Son | — | Illinois |
| 44 | Nicholas Parras | 2 | Son | — | Illinois |
| 45 | Nicholas Parras | 72 | Father | — | Greece |
| 46 | Leon Miner | 33 | Head | Butcher | Canada Eng |
| 47 | Lillian Miner | 31 | Wife | — | Illinois |
| 48 | Robert Miner | 7 | Son | — | Illinois |
| 49 | Jean Marie Miner | 5 | Daughter | — | Illinois |
| 50 | Walter Dankwart | 28 | Head | Metallurgist | Illinois |
| 51 | Constance Dankwart | 24 | Wife | — | Illinois |
| 52 | Michael Shanahan | 54 | Head | Weighmaster | Illinois |
| 53 | Grace Shanahan | 49 | Wife | — | Illinois |
| 54 | Eddie Edward Shanahan | 29 | Step son | Bookkeeper | Illinois |
| 55 | Emil Hagelberg | 61 | Head | Retriever Pipes Mach | Sweden |
| 56 | Anna Hagelberg | 58 | Wife | — | Sweden |
| 57 | Eugenia Miller | 62 | Roomer | — | Sweden |
| 58 | Jas T Beale | 59 | Head | Route Freight | Illinois |
| 59 | Daisy Beale | 59 | Wife | — | Illinois |
| 60 | Grace Lillian Beale | 27 | Daughter | — | Illinois |
| 61 | Patsy Ann Beale | 4 | Granddaughter | — | Illinois |
| 62 | W. F. Kuhneman | 44 | Head | Stock Clerk | Illinois |
| 63 | Elvira Kuhneman | 37 | Wife | — | Illinois |
| 64 | Lorraine Kuhneman | 1 | Daughter | — | Illinois |
| 65 | Thomas K Palley | 62 | Head | Line Stock Clerk | Ireland |
| 66 | Mae M Palley | 56 | Wife | — | Illinois |
| 67 | Ralph Palley | 33 | Son | Rate Clerk | Illinois |
| 68 | Roy Kiefer | 24 | Head | Traveling Salesman | Indiana |
| 69 | Marion Kiefer | 23 | Wife | File Clerk | Illinois |
| 70 | Maude Reilly | 50 | Mother in law | — | Illinois |
| 71 | Robert Reilly | 21 | Brother in law | Gen Off Clerk | Illinois |
| 72 | John E Larson | 69 | Head | — | Sweden |
| 73 | Mary Larson THIS PERSON | 62 | Wife | — | Illinois |
| 74 | Robert E Larson | 33 | Son | Electrical Engineer | Illinois |
| 75 | Joseph Stein | 61 | Head | — | Germany |
| 76 | Elizabeth Stein | 59 | Wife | — | Germany |
| 77 | Julia Wagner | 52 | Head | Telephone Operator | Illinois |
| 78 | John Uneritch | 36 | Son in law | Cook | Poland |
| 79 | Bernice Uneritch | 30 | Daughter | Telephone Operator | Illinois |
| 80 | Irwin Wagner | 28 | Son | Meterman | Illinois |
Related Census Records
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)