MN
Mary Nolan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Nolan across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1930), then head of a 9-person household.
Age 10
b. ~1930
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Nolan |
| Given Name | Mary P. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Highest Grade | G 3 |
| 1935 Residence | Same town |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago |
| 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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Ruth Nolan | Daughter | — | 18 | ~1922 |
| Margaret Nolan | Daughter | — | 20 | ~1920 |
| Kathleen Nolan | Daughter | — | 23 | ~1917 |
| Bernice Nolan | Daughter | — | 22 | ~1918 |
| Mary Nolan | Daughter | — | 10 | ~1930 |
| Bernice Nolan | Head | — | 47 | ~1893 |
| Thomas Nolan | Son | — | 7 | ~1933 |
| John Nolan | Son | — | 20 | ~1920 |
| Robert Nolan | Son | — | 16 | ~1924 |
Census Appearances
1930
Cook, Illinois
Daughter, age 2
Cook, Illinois · implied b. ~1928 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nolan |
| Given Name | Mary P. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Michigan |
| Occupation | none |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 10
Cook-County, Illinois · implied b. ~1930 — 9 household members
| Surname | Nolan |
| Given Name | Mary P. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (County) | Cook |
| Highest Grade | G 3 |
| 1935 Residence | Same town |
| 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 Nolan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Nolan
Daughter · 1940 · age 10 · b. ~1930 · Illinois
★ You are viewing this record
Sibling
Kathleen Nolan
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernice Nolan
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Nolan
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Nolan
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Nolan
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Nolan
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Nolan
Sibling · 1940 · age 20
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-t0627-00982-00490)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Suzanne Thomas | 2 | Daughter | — | Illinois |
| 2 | Charles H. Luecke | 51 | Head | 40 | Missouri |
| 3 | Mary S. Luecke | 55 | Wife | — | Missouri |
| 4 | Arthur Byrne | 27 | Head | 48 | Indiana |
| 5 | Helen Byrne | 24 | Wife | — | Illinois |
| 6 | Richard Byrne | 3 | Son | — | Illinois |
| 7 | — | None | — | — | — |
| 8 | Bernice Nolan | 47 | Head | — | Michigan |
| 9 | Kathleen M. Nolan | 23 | Daughter | 40 | Michigan |
| 10 | Bernice Nolan | 22 | Daughter | 40 | Michigan |
| 11 | John J. Nolan | 20 | Son | 40 | Michigan |
| 12 | Margaret M. Nolan | 20 | Daughter | 35 | Michigan |
| 13 | Ruth E. Nolan | 18 | Daughter | — | Illinois |
| 14 | Robert P. Nolan | 16 | Son | 6 | Illinois |
| 15 | Mary P. Nolan THIS PERSON | 10 | Daughter | — | Illinois |
| 16 | Thomas J. Nolan | 7 | Son | — | Illinois |
| 17 | Fred Everett | 44 | Head | 48 | Illinois |
| 18 | Anna Everett | 41 | Wife | — | Illinois |
| 19 | Darlene Everett | 19 | Daughter | 21 | Illinois |
| 20 | Elaine Everett | 16 | Daughter | 40 | Illinois |
| 21 | Fred J. Everett | 14 | Son | — | Illinois |
| 22 | John E. Everett | 12 | Son | — | Illinois |
| 23 | Bruce Everett | 10 | Son | — | Illinois |
| 24 | Mary Lou Everett | 5 | Daughter | — | Illinois |
| 25 | Raymond L. Jordan | 31 | Head | 44 | Missouri |
| 26 | Edna Jordan | 31 | Wife | — | Michigan |
| 27 | Beverly R. Jordan | 9 | Daughter | — | Illinois |
| 28 | Donald Jordan | 5 | Son | — | Illinois |
| 29 | Carl Freeman | 38 | Head | 10 | Pennsylvania |
| 30 | Emma Freeman | 35 | Wife | — | Montana |
| 31 | Helen Freeman | 14 | Daughter | — | Pennsylvania |
| 32 | William M. Freeman | 12 | Son | — | Illinois |
| 33 | Suzanne Freeman | 8 | Daughter | — | Illinois |
| 34 | Sandra Freeman | 6 | Daughter | — | Illinois |
| 35 | Lynne Freeman | 2 | Daughter | — | Illinois |
| 36 | Robert J. Semin | 52 | Head | 48 | Illinois |
| 37 | Belle Semin | 56 | Wife | — | Illinois |
| 38 | George Moore | 30 | Head | Illinois | Illinois |
| 39 | G. Selma Moore | 23 | Wife | Illinois | Illinois |
| 40 | Irene Dale | 21 | Lodger | Illinois | 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)