MN
Mary Nolan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Nolan across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Kate & Catherine — first a head (b.~1893), then head of a 2-person household.
Age 47
b. ~1893
Female
Head
Born: Illinois
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Nolan |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 47 |
| Marital Status | Widowed |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Cook |
| Industry | Candy Manuf. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Cook |
| Township / Ward | Chicago |
| Est. Birth Year | ~1893 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Nolan | Head | — | 47 | ~1893 |
| Lawrence Nolan | Son | — | 25 | ~1915 |
Census Appearances
1920
Cook, Illinois
Daughter, age 25
Cook, Illinois · implied b. ~1895 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nolan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Cashier |
| Industry | Dept Store |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Daughter, age 36
Cook, Illinois · implied b. ~1894 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nolan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 36 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 47
Cook-County, Illinois · implied b. ~1893 — 2 household members
| Surname | Nolan |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 47 |
| Marital Status | Widowed |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Occupation | Cook |
| Industry | Candy Manuf. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | No 8 |
| 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 Nolan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Kate Nolan (~0.92 confidence) and mother Catherine Nolan (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Kate Nolan
b. ~1872
Source mother
● Household
· direct · ~0.92
Mother
Catherine Nolan
b. ~1875
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Nolan
Head · 1940 · age 47 · b. ~1893 · 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-t0627-00994-00653)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Anna Kayser | 28 | Wife | — | Illinois |
| 2 | Darlene Kayser | 4 | Daughter | — | Illinois |
| 3 | Richard Kayser | 1 | Son | — | Illinois |
| 4 | James Caddell | 59 | Head | Brick Layer | Scotland |
| 5 | Theodore F. Kruse | 46 | Head | Bookkeeper | Germany |
| 6 | Rose Kruse | 41 | Wife | — | Illinois |
| 7 | Theodore F. Jr. Kruse | 13 | Son | — | Illinois |
| 8 | Jean Irene Kruse | 9 | Daughter | — | Illinois |
| 9 | Richard Nelson | 58 | Head | Foreman Wood Work | Norway |
| 10 | Helen Nelson | 56 | Wife | — | Norway |
| 11 | Ruth Nelson | 27 | Daughter | Sales Clerk | Illinois |
| 12 | Nora Nelson | 25 | Daughter | Teacher | Illinois |
| 13 | Theodore Peterson | 56 | Head | Cabinet Maker | Sweden |
| 14 | Agda Peterson | 48 | Wife | — | Sweden |
| 15 | Ella Peterson | 19 | Daughter | Typist | Illinois |
| 16 | Burney Peterson | 16 | Son | — | Illinois |
| 17 | Emma Peterson | 38 | Head | — | Illinois |
| 18 | Humbert Groppi | 50 | Head | Statuary Architect | Italy |
| 19 | Emma Groppi | 45 | Wife | — | Italy |
| 20 | Humbert Jr. Groppi | 24 | Son | Bookkeeper | Illinois |
| 21 | John Groppi | 18 | Son | — | Illinois |
| 22 | Mary Therese Groppi | 12 | Daughter | — | Illinois |
| 23 | Carmen Gentile | 42 | Head | Barber | Italy |
| 24 | Rose Gentile | 41 | Wife | — | Illinois |
| 25 | Lois Gentile | 15 | Daughter | — | Illinois |
| 26 | John Darette | 76 | Uncle | — | Italy |
| 27 | James Feidt | 40 | Head | Draftsman | Illinois |
| 28 | Mary Feidt | 41 | Wife | — | Illinois |
| 29 | George Hefferin | 39 | Head | Repair Bicycle & Toys | Illinois |
| 30 | Edward Hefferin | 36 | Son | Machine Setter | Illinois |
| 31 | George Mcauliffe | 35 | Head | Plumbing Laborer | Illinois |
| 32 | Margaret Mcauliffe | 30 | Wife | — | Kentucky |
| 33 | Phyllis Mcauliffe | 7 | Daughter | — | Illinois |
| 34 | Tony Judge | 46 | Head | President Of News Drivers | Illinois |
| 35 | Alvina Judge | 43 | Wife | — | Illinois |
| 36 | Ann Judge | 20 | Daughter | — | Illinois |
| 37 | Anthony Judge | 12 | Son | — | Illinois |
| 38 | Mick Judge | 9 | Son | — | Illinois |
| 39 | Mary Nolan THIS PERSON | 47 | Head | Cook | Illinois |
| 40 | Lawrence Nolan | 25 | Son | Accountant | Illinois |
Pedigree Summary
Mary
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
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)