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Mary Mullen — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Mullen across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1900), then head of a 7-person household.
Age 40
b. ~1900
Female
Spouse
Born: Ireland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Mullen |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Naturalization Status | Alien |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1900 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Kathryn Mullen | Daughter | — | 12 | ~1928 |
| Patricia Mullen | Daughter | — | 8 | ~1932 |
| Anna Mullen | Daughter | — | 13 | ~1927 |
| Michael Mullen | Head | — | 43 | ~1897 |
| James Mullen | Son | — | 9 | ~1931 |
| Joseph Mullen | Son | — | 6 | ~1934 |
| Mary Mullen | Spouse | — | 40 | ~1900 |
Census Appearances
1930
Cook, Illinois
Daughter, age 31
Cook, Illinois · implied b. ~1899 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mellen |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Divorced |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1901 |
| Age at First Marriage | 24 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Switch Board Operator |
| Industry | Hospital |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Veteran | No |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Cook-County, Illinois
Spouse, age 40
Cook-County, Illinois · implied b. ~1900 — 7 household members
| Surname | Mullen |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Naturalization Status | Alien |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
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 Mullen across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mullen
Spouse · 1940 · age 40 · b. ~1900 · Illinois
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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-t0627-00948-00508)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary Stapleton | 31 | Wife | — | Illinois |
| 2 | Anthony J Stapleton | 1 | Son | — | Illinois |
| 3 | James Modesto | 37 | Head | Machinist | Italy |
| 4 | Minnie Modesto | 33 | Wife | — | Illinois |
| 5 | Ann Marie Modesto | 2 | Daughter | — | Illinois |
| 6 | Modesto | None | — | — | — |
| 7 | Michael Collins | 47 | Head | Laborer | Missouri |
| 8 | Lella Collins | 47 | Wife | — | Ireland |
| 9 | James Nolan | 44 | Head | Motorman | Ireland |
| 10 | Beatrice Nolan | 44 | Wife | — | Ireland |
| 11 | Mary Nolan | 21 | Daughter | Dictaphone Oper | Illinois |
| 12 | Francis Nolan | 19 | Son | Helper | Illinois |
| 13 | John Novak | 52 | Head | Sign Painter | Illinois |
| 14 | Phyllis Novak | 50 | Wife | — | Italy |
| 15 | Joseph Newton | 23 | Son-in-law | Chemist | Illinois |
| 16 | Angelina Newton | 22 | Daughter | — | Illinois |
| 17 | Michael O'Connor | 36 | Head | Conductor | Illinois |
| 18 | Anna O'Connor | 36 | Wife | — | Illinois |
| 19 | Andrew O'Connor | 15 | Son | — | Illinois |
| 20 | Laverne O'Connor | 14 | Daughter | — | Illinois |
| 21 | Jack O'Connor | 10 | Son | — | Illinois |
| 22 | George Hagenberg | 45 | Head | Bone & Tallow | Illinois |
| 23 | Emilie Hagenberg | 44 | Wife | — | Illinois |
| 24 | Richard Hagenberg | 23 | Son | Chemist | Illinois |
| 25 | Charlotte Hagenberg | 19 | Daughter | — | Illinois |
| 26 | Michael Mullen | 43 | Head | Laborer | Ireland |
| 27 | Mary Mullen THIS PERSON | 40 | Wife | — | Ireland |
| 28 | Anna Marie Mullen | 13 | Daughter | — | Illinois |
| 29 | Kathryn Mullen | 12 | Daughter | — | Illinois |
| 30 | James Mullen | 9 | Son | — | Illinois |
| 31 | Patricia Mullen | 8 | Daughter | — | Illinois |
| 32 | Joseph Mullen | 6 | Son | — | Illinois |
| 33 | William Moga | 45 | Head | Truck Driver | Illinois |
| 34 | Minnie Moga | 41 | Wife | — | Illinois |
| 35 | Lester Moga | 20 | Son | Clerking | Illinois |
| 36 | Gloria Moga | 13 | Daughter | — | Illinois |
| 37 | Julius Stine | 65 | Head | — | Germany |
| 38 | Anna Stine | 59 | Wife | — | Germany |
| 39 | John Meryung | 36 | Head | Welder | Germany |
| 40 | Julia Meryung | 29 | 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)