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Mary Mcnulty — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Mcnulty across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1916), then head of a 9-person household.
Age 24
b. ~1916
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | McNulty |
| Given Name | Mary C. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Winnetka village |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Technician |
| Industry | School |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 700 |
| Highest Grade | C 4 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Technician |
| Township / Ward | Winnetka Village |
| Est. Birth Year | ~1916 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Mcnulty | Daughter | — | 24 | ~1916 |
| Robert Mcnulty | Son | — | 13 | ~1927 |
| William Mcnulty | Son | — | 19 | ~1921 |
| Margaret Mcnulty | Daughter | — | 21 | ~1919 |
| James Mcnulty | Head | — | 44 | ~1896 |
| Cornelia Mcnulty | Spouse | — | 47 | ~1893 |
| Thomas Mcnulty | Son | — | 15 | ~1925 |
| Kathleen Mcnulty | Daughter | — | 17 | ~1923 |
| James Mcnulty | Son | — | 22 | ~1918 |
Census Appearances
1930
Cook, Illinois
Daughter, age 14
Cook, Illinois · implied b. ~1916 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McNulty |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| 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 24
Cook-County, Illinois · implied b. ~1916 — 9 household members
| Surname | McNulty |
| Given Name | Mary C. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Winnetka village |
| 1935 Residence (County) | Cook |
| Occupation | Technician |
| Industry | School |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 700 |
| Highest Grade | C 4 |
| 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 Mcnulty across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mcnulty
Daughter · 1940 · age 24 · b. ~1916 · Illinois
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Sibling
Thomas Mcnulty
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kathleen Mcnulty
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Mcnulty
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Mcnulty
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Mcnulty
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Mcnulty
Sibling · 1940 · age 19
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-t0627-00783-00767)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | George A. Macdonald | 61 | Head | Sales Manager | Scotland |
| 42 | Margaret Macdonald | 56 | Wife | — | Illinois |
| 43 | Angus Macdonald | 32 | Son | Manufacturing Division | Illinois |
| 44 | Michie Young | 45 | Servant | Maid | Scotland |
| 45 | Walter Carlson | 32 | Head | Chauffeur | Sweden |
| 46 | Esther Carlson | 36 | Wife | — | Illinois |
| 47 | Marion Carlson | 6 | Daughter | — | Illinois |
| 48 | Susan F. Hibbard | 66 | Head | — | Illinois |
| 49 | Blanche F. Caldwell | 68 | Sister | — | Illinois |
| 50 | Marie Nolahl | 56 | Servant | Maid | Sweden |
| 51 | Emily Monson | 64 | Servant | Cook | Sweden |
| 52 | Anna L. Engstrom | 58 | Servant | Maid | Sweden |
| 53 | Rudolph Rundquist | 40 | Head | Gardener | Sweden |
| 54 | Beatrice Rundquist | 41 | Wife | — | Iowa |
| 55 | Arnold W. Dotman | 56 | Head | Executive | Maine |
| 56 | Elinor K. Dotman | 57 | Wife | — | Illinois |
| 57 | Priscilla A. Dotman | 17 | Daughter | — | Illinois |
| 58 | Winifred Banner | 26 | Servant | Maid | Illinois |
| 59 | Albert H. Korges | 51 | Head | Executive | Illinois |
| 60 | Annie W. Korges | 50 | Wife | — | Illinois |
| 61 | Ruth L. Rasmussen | 32 | Servant | Maid | Illinois |
| 62 | George S. Parker | 57 | Head | President | New York |
| 63 | Carolyn W. Parker | 55 | Wife | — | Illinois |
| 64 | Jane Parker | 22 | Daughter | — | Illinois |
| 65 | Cora Johnwald | 52 | Servant | Cook | Wisconsin |
| 66 | James H. Onderdonk | 51 | Head | Salesman | New York |
| 67 | Olive Onderdonk | 49 | Wife | — | Illinois |
| 68 | Irene Rohrer | 48 | Servant | Maid | Germany |
| 69 | James J. Mcnulty | 44 | Head | Partner | Illinois |
| 70 | Cornelia Mcnulty | 47 | Wife | — | Illinois |
| 71 | Mary C. Mcnulty THIS PERSON | 24 | Daughter | Technician | Illinois |
| 72 | James J. Jr. Mcnulty | 22 | Son | — | Illinois |
| 73 | Margaret E. Mcnulty | 21 | Daughter | — | Illinois |
| 74 | William D. Mcnulty | 19 | Son | — | Illinois |
| 75 | Kathleen Mcnulty | 17 | Daughter | — | Illinois |
| 76 | Thomas F. Mcnulty | 15 | Son | — | Illinois |
| 77 | Robert E. Mcnulty | 13 | Son | — | Illinois |
| 78 | Thornton Adams | 40 | Head | Merchandise Manager | Illinois |
| 79 | Jessica Adams | 32 | Wife | — | Illinois |
| 80 | Jacqueline Adams | 16 | 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)