MM
Mary Madden — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Madden across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents William & William — first a daughter (b.~1919), then head of a 3-person household.
Age 21
b. ~1919
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Madden |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Office Clerk |
| Industry | Mailing Contractor |
| 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 | Office Clerk |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1919 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Katherine Madden | Spouse | — | 55 | ~1885 |
| Mary Madden | Daughter | — | 21 | ~1919 |
| William Madden | Head | — | 58 | ~1882 |
Census Appearances
1920
Cook, Illinois
Daughter, age 1
Cook, Illinois · implied b. ~1919 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Madden |
| Given Name | Mary V |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Daughter, age 11
Cook, Illinois · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Madden |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 21
Cook-County, Illinois · implied b. ~1919 — 3 household members
| Surname | Madden |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Office Clerk |
| Industry | Mailing Contractor |
| 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 Madden across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Madden (~0.92 confidence) and father William Madden (~0.92 confidence) and mother Katherine Madden (~0.92 confidence) and mother Katherine Madden (~0.92 confidence) and father William Madden (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Madden
b. ~1882
Source father
● Household
· direct · ~0.92
Father
William Madden
b. ~1882
Source father
● Household
· direct · ~0.92
Mother
Katherine Madden
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Katherine Madden
b. ~1885
Source mother
● Household
· direct · ~0.92
Father
William Madden
b. ~1885
Source father
● Household
· direct · ~0.92
This person
Anchor record
Mary Madden
Daughter · 1940 · age 21 · b. ~1919 · 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-t0627-01016-00163)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Walter Q Stone | 26 | Head | Elevator Operator | Illinois |
| 2 | Miriam Stone | 29 | Wife | — | Minnesota |
| 3 | Sheila Lyn Stone | 2 | Daughter | — | Illinois |
| 4 | John J Nash | 64 | Head | Office Clerk | Illinois |
| 5 | Mary L Nash | 58 | Sister | — | Illinois |
| 6 | William Madden | 58 | Head | Mail Dispatcher | Illinois |
| 7 | Katherine Madden | 55 | Wife | — | Illinois |
| 8 | Mary Madden THIS PERSON | 21 | Daughter | Office Clerk | Illinois |
| 9 | Frank Leesch | 65 | Head | Conductor | Illinois |
| 10 | Mamie Leesch | 35 | Sister | Office Clerk | Illinois |
| 11 | Mary Thomas | 65 | Housekeeper | Housekeeper | Illinois |
| 12 | John Bailey | 39 | Head | Service Man | New York |
| 13 | Rena Bailey | 38 | Wife | — | Florida |
| 14 | Jack Bailey | 14 | Son | — | Illinois |
| 15 | Minnie Boyd | 56 | Mother in law | — | Florida |
| 16 | Louis E Frandsen | 45 | Head | Seamstress | Holland |
| 17 | Marie Frandsen | 42 | Wife | Printer | Holland |
| 18 | Louise Frandsen | 22 | Daughter | Saleswoman | Illinois |
| 19 | Robert Frandsen | 17 | Son | Office Clerk | Illinois |
| 20 | Walter N Hagberg | 55 | Head | Truck Driver Helper | Illinois |
| 21 | Adelade Hagberg | 49 | Wife | Photographer | Wisconsin |
| 22 | William Hagberg | 9 | Son | — | Wisconsin |
| 23 | Mary J Hagberg | 5 | Daughter | — | Wisconsin |
| 24 | Beda Bent | 60 | Sister | — | Illinois |
| 25 | Jennie Johnson | 60 | Lodger | Bookkeeper | Illinois |
| 26 | Josephine Rink | 25 | Lodger | Laundress | Kansas |
| 27 | Julia Stripe | 23 | Lodger | Interviewer | Illinois |
| 28 | Amy E Jenkins | 77 | Head | — | England |
| 29 | John T Jenkins | 52 | Son | — | Illinois |
| 30 | Amy X Jenkins | 47 | Daughter | — | Illinois |
| 31 | Alexander Jacobs | 63 | Head | Tea Maker | Germany |
| 32 | Hedwig X Jacobs | 63 | Wife | Salesman | Germany |
| 33 | Adams Jacobs | None | Paul H | — | No 8 |
| 34 | Ida E Adams | 56 | Wife | Traffic Inspector | Kansas |
| 35 | Arthur Q Schultz | 53 | Head | — | Illinois |
| 36 | Frieda Schultz | 54 | Wife | Salesman | Illinois |
| 37 | Edna Schultz | 32 | Daughter | — | Illinois |
| 38 | Hubert Dennis | 42 | Head | Office Clerk | Illinois |
| 39 | Ruth Dennis | 44 | Wife | Station Attendant | Illinois |
| 40 | Dennis | None | — | — | — |
Pedigree Summary
Mary
Gen 1 · 5 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)