MD
Mary Dorsey — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Dorsey across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1930), then head of a 7-person household.
Age 10
b. ~1930
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Dorsey |
| Given Name | Mary Patricia |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago city |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Highest Grade | G 5 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1930 |
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 |
|---|---|---|---|---|
| Dorothy Dorsey | Daughter | — | 16 | ~1924 |
| Donald Dorsey | Son | — | 20 | ~1920 |
| Forest Dorsey | Head | — | 48 | ~1892 |
| James Dorsey | Son | — | 13 | ~1927 |
| Francis Dorsey | Son | — | 22 | ~1918 |
| Mary Dorsey | Daughter | — | 10 | ~1930 |
| Ellen Dorsey | Spouse | — | 46 | ~1894 |
Census Appearances
1930
Cook, Illinois
Daughter, age 1
Cook, Illinois · implied b. ~1929 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dorsey |
| Given Name | Margaret T. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 10
Cook-County, Illinois · implied b. ~1930 — 7 household members
| Surname | Dorsey |
| Given Name | Mary Patricia |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago city |
| 1935 Residence (County) | Cook |
| Highest Grade | G 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 Dorsey across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Dorsey
Daughter · 1940 · age 10 · b. ~1930 · Illinois
★ You are viewing this record
Sibling
James Dorsey
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Dorsey
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Dorsey
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Dorsey
Sibling · 1940 · age 16
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-t0627-00952-00314)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Patrick J. Mooney | 56 | Head | Maintenance | Ireland |
| 2 | Margaret Collins | 57 | Housekeeper | Housekeeper | New York |
| 3 | Helen Collins | 20 | Housekeeper's daughter | Stenographer | Illinois |
| 4 | Arthur Hinkle | 33 | Head | Lithographer | Kentucky |
| 5 | Vivian Hinkle | 34 | Wife | — | Kentucky |
| 6 | Henry Tankersley | 37 | Head | Lithographer | Kentucky |
| 7 | Martha Tankersley | 27 | Wife | — | Illinois |
| 8 | Clement See | 30 | Head | Auto Repairs | Illinois |
| 9 | Marie See | 28 | Wife | — | Michigan |
| 10 | Shirley See | 10 | Daughter | — | Illinois |
| 11 | Delmar See | 10 | Son | — | Illinois |
| 12 | Florence See | 8 | Daughter | — | Illinois |
| 13 | Glenn See | 3 | Son | — | Illinois |
| 14 | Jas A. Walli | 34 | Head | Stationary Engineer | Wisconsin |
| 15 | Irene Walli | 42 | Wife | — | Illinois |
| 16 | Regina Walli | 10 | Daughter | — | Illinois |
| 17 | Coletta Walli | 8 | Daughter | — | Illinois |
| 18 | Mary Walli | 7 | Daughter | — | Illinois |
| 19 | James Walli | 5 | Son | — | Illinois |
| 20 | Frank Cappitta | 35 | Head | Driver Salesman | Illinois |
| 21 | Julia Cappitta | 36 | Wife | — | Illinois |
| 22 | Patricia Cappitta | 3 | Daughter | — | Illinois |
| 23 | Franklin Darrah | 34 | Head | Office Worker | Ohio |
| 24 | Thelma Darrah | 31 | Wife | — | Pennsylvania |
| 25 | Frank Bertisco | 40 | Head | Steamfitter | Italy |
| 26 | Rose Bertisco | 38 | Wife | — | Illinois |
| 27 | Joseph Bertisco | 16 | Son | — | Illinois |
| 28 | Victoria Bertisco | 15 | Daughter | — | Illinois |
| 29 | Theo Bertisco | 10 | Son | — | Illinois |
| 30 | Forest Dorsey | 48 | Head | Office Worker | Utah |
| 31 | Ellen Dorsey | 46 | Wife | — | Illinois |
| 32 | Francis Dorsey | 22 | Son | Apprentice | Illinois |
| 33 | Donald Dorsey | 20 | Son | Salesman | Illinois |
| 34 | Dorothy Dorsey | 16 | Daughter | Office Worker | Illinois |
| 35 | James Dorsey | 13 | Son | — | Illinois |
| 36 | Mary Patricia Dorsey THIS PERSON | 10 | Daughter | — | Illinois |
| 37 | James Mekaito | 43 | Head | Wood Pattern Maker | Illinois |
| 38 | Olga Mekaito | 35 | Wife | — | Illinois |
| 39 | Eleanor Mekaito | 10 | Daughter | — | Illinois |
| 40 | Gloria Mekaito | 3 | 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)