MH
Mary Healy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Healy across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1873), then head of a 7-person household.
Age 67
b. ~1873
Female
Head
Born: Minnesota
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Healy |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 67 |
| Marital Status | Widowed |
| Birthplace | Minnesota |
| 1935 Residence (City) | Oak Park Village |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | General office work |
| Industry | Church |
| Class of Worker | PW |
| Hours Worked | 20 |
| Income (1939) | 490 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Occupation | General Office Work |
| Township / Ward | Oak Park Village |
| Est. Birth Year | ~1873 |
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 |
|---|---|---|---|---|
| Patricia Murray | Daughter | — | 30 | ~1910 |
| Mary Healy | Head | — | 67 | ~1873 |
| Dennis Murray | Other | — | ~1940 | |
| James Murray | Other | — | 6 | ~1934 |
| James Murray | Other | — | 31 | ~1909 |
| Michael Murray | Other | — | 4 | ~1936 |
| John Healy | Son | — | 34 | ~1906 |
Census Appearances
1920
Cook, Illinois
Head, age 47
Cook, Illinois · implied b. ~1873
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | Haly |
| Given Name | Marcella |
| Relationship to Head | head |
| Sex | F |
| Color / Race | White |
| Age | 47 |
| Marital Status | Widowed |
| Birthplace | Minnesota |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Manicurist |
| Industry | Beauty Parlor |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1930
Cook, Illinois
Head, age 58
Cook, Illinois · implied b. ~1872 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Haley |
| Given Name | Marcella |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 58 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 8,000 |
| Radio Set | R |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1940
Cook-County, Illinois
Head, age 67
Cook-County, Illinois · implied b. ~1873 — 7 household members
| Surname | Healy |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 67 |
| Marital Status | Widowed |
| Birthplace | Minnesota |
| 1935 Residence (City) | Oak Park Village |
| 1935 Residence (County) | Cook |
| Occupation | General office work |
| Industry | Church |
| Class of Worker | PW |
| Hours Worked | 20 |
| Income (1939) | 490 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
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 Healy across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Healy
Head · 1940 · age 67 · b. ~1873 · 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
38 people indexed on this census page (nara:1940:m-t0627-00786-00120)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Lucien Annunziata | 39 | Head | Linotype Operator | Italy |
| 2 | Elizabeth Annunziata | 31 | Wife | — | Illinois |
| 3 | Betty Annunziata | 14 | Daughter | — | Illinois |
| 4 | Raymond Annunziata | 4 | Son | — | Illinois |
| 5 | Ethel Annunziata | 1 | Daughter | — | Illinois |
| 6 | Arthur Hrick | 44 | Head | Accountant | Illinois |
| 7 | Ella Hrick | 41 | Wife | — | Illinois |
| 8 | Lorraine Hrick | 17 | Daughter | — | Illinois |
| 9 | Allen Hrick | 12 | Son | — | Illinois |
| 10 | Charles Ranager | 46 | Head | Car Foreman | Illinois |
| 11 | Ella Ranager | 45 | Wife | — | Illinois |
| 12 | Viola Ranager | 20 | Daughter | Stenographer | Illinois |
| 13 | William J Sack | 46 | Head | Tool And Die | Illinois |
| 14 | Mathilda Sack | 37 | Wife | — | Illinois |
| 15 | William Jr Sack | 7 | Son | — | Illinois |
| 18 | Edward R Prueter | 42 | Head | Accountant | Illinois |
| 19 | Clara B Prueter | 42 | Wife | — | Illinois |
| 20 | Eldred G Prueter | 16 | Son | — | Illinois |
| 21 | Arnold E Prueter | 8 | Son | — | Illinois |
| 22 | Clara Buss | 72 | Mother-in-law | — | Ohio |
| 23 | William Noorlag | 70 | Head | — | Netherlands |
| 24 | Emma Noorlag | 68 | Wife | — | Illinois |
| 25 | Elsie Wassbrodt | 35 | Daughter | Marker | Illinois |
| 26 | Mary Healy THIS PERSON | 67 | Head | General Office Work | Minnesota |
| 27 | John Healy | 34 | Son | — | South Dakota |
| 28 | James Murray | 31 | Son-in-law | Order Clerk | Illinois |
| 29 | Patricia Murray | 30 | Daughter | — | Minnesota |
| 30 | James Murray | 6 | Grand-son | — | Illinois |
| 31 | Michael Murray | 4 | Grand-son | — | Illinois |
| 32 | Dennis Murray | 0 | Grand-son | — | Illinois |
| 33 | Edwin Zielke | 36 | Head | Truck Driver | Illinois |
| 34 | Alice Zielke | 34 | Wife | — | Illinois |
| 35 | Lindsay Cox | 40 | Head | General Office Work | Illinois |
| 36 | Mildred Cox | 41 | Wife | — | Indiana |
| 37 | Lindsay Jr Cox | 14 | Son | — | Illinois |
| 38 | Charlotte Cox | 9 | Daughter | — | Illinois |
| 39 | Dorothy Cox | 9 | Daughter | — | Illinois |
| 40 | Clarence Steckel | 35 | Head | Factory Foreman | 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)