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Mary Mcgovern — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Mcgovern across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1915), then head of a 6-person household.
Age 25
b. ~1915
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | McGovern |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Typist |
| Industry | Rent + Real Estate |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 270 |
| Highest Grade | H 4 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Typist |
| Township / Ward | Chicago |
| Est. Birth Year | ~1915 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Nora Mcgovern | Spouse | — | 54 | ~1886 |
| Florence Mcgovern | Daughter | — | 15 | ~1925 |
| Lawrence Mcgovern | Head | — | 58 | ~1882 |
| Mary Mcgovern | Daughter | — | 25 | ~1915 |
| Margaret Mcgovern | Daughter | — | 18 | ~1922 |
| Josephine Mcgovern | Daughter | — | 23 | ~1917 |
Census Appearances
1930
Cook, Illinois
Daughter, age 15
Cook, Illinois · implied b. ~1915 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGovern |
| Given Name | Mae |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| 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 25
Cook-County, Illinois · implied b. ~1915 — 6 household members
| Surname | McGovern |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Occupation | Typist |
| Industry | Rent + Real Estate |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 270 |
| 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 Mary Mcgovern across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mcgovern
Daughter · 1940 · age 25 · b. ~1915 · Illinois
★ You are viewing this record
Sibling
Josephine Mcgovern
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Mcgovern
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Florence Mcgovern
Sibling · 1940 · age 15
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-t0627-00933-00647)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Marion Olmstead | 23 | Wife | Factory Worker | Illinois |
| 42 | Francis Manau | 30 | Head | Forward Shipping | Illinois |
| 43 | Margaret Manau | 29 | Wife | Cashier | Colorado |
| 44 | Frank O'Connell | 34 | Head | Chauffer | Illinois |
| 45 | Julia O'Connell | 31 | Wife | — | Illinois |
| 46 | Emma Janglein | 50 | Head | — | Germany |
| 47 | Sophia Reinhold | 35 | Cousin | Beauty Operator | Germany |
| 48 | Leonard Meeder | 32 | Head | Clerical Office Machine | Illinois |
| 49 | Grace Meeder | 33 | Wife | Operator | Illinois |
| 50 | John L. Fraser | 64 | Head | Railroad Clerk | Scotland |
| 51 | Jean Fraser | 54 | Wife | — | Scotland |
| 52 | Kenneth Fraser | 19 | Son | New Worker | Scotland |
| 53 | John Curtain | 45 | Head | Bakelite Molder | Austria |
| 54 | Nora Curtain | 46 | Wife | — | Irish Free State |
| 55 | Dennis Curtain | 10 | Son | — | Illinois |
| 56 | Brother Dennis | None | M | Repair Shop | — |
| 57 | Benjamin Green | 35 | Head | Special Collector | Illinois |
| 58 | Margaret Green | 32 | Wife | — | Illinois |
| 59 | Margaret A. Green | 5 | Daughter | — | Illinois |
| 60 | Lawrence Mcgovern | 58 | Head | Police Officer | Irish Free State |
| 61 | Nora Mcgovern | 54 | Wife | — | Irish Free State |
| 62 | Mary Mcgovern THIS PERSON | 25 | Daughter | Typist | Illinois |
| 63 | Josephine Mcgovern | 23 | Daughter | Beauty Op | Illinois |
| 64 | Margaret Mcgovern | 18 | Daughter | New Worker | Illinois |
| 65 | Florence Mcgovern | 15 | Daughter | — | Illinois |
| 66 | Joseph O'Connor | 67 | Head | Private Watchman | Illinois |
| 67 | Mary O'Connor | 55 | Wife | — | Illinois |
| 68 | Mae O'Connor | 27 | Daughter | Stenographer | Illinois |
| 69 | Harry Renninger | 42 | Head | Motor Truck Driver | Illinois |
| 70 | Helen Renninger | 39 | Wife | — | Illinois |
| 71 | Harry Jr. Renninger | 16 | Son | — | Illinois |
| 72 | Robert Renninger | 13 | Son | — | Illinois |
| 73 | Ellen Ryd | 66 | Head | Christian Science Practitioner | Sweden |
| 74 | Annie Stanley | 76 | Roomer | — | Northern Ireland |
| 75 | Frank Dehycker | 39 | Head | Credit Man | Illinois |
| 76 | Harriet Dehycker | 34 | Wife | — | Illinois |
| 77 | Richard Dehycker | 15 | Son | — | Illinois |
| 78 | Beverley Dehycker | 9 | Daughter | — | Illinois |
| 79 | David O'Brien | 74 | Head | — | Pennsylvania |
| 80 | Annie O'Brien | 73 | Wife | — | 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)