MD
Mary Dugan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Dugan across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1891), then head of a 8-person household.
Age 49
b. ~1891
Female
Spouse
Born: Irish Free State
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Dugan |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | 6 |
| 1935 Residence | Same House |
| Birthplace (normalized) | irish free state |
| Township / Ward | Chicago |
| Est. Birth Year | ~1891 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Kathleen Dugan | Daughter | — | 11 | ~1929 |
| Terrence Dugan | Son | — | 16 | ~1924 |
| Michael Dugan | Other | — | 2 | ~1938 |
| Mary Dugan | Daughter | — | 13 | ~1927 |
| John Dugan | Head | — | 47 | ~1893 |
| Robert Dugan | Son | — | 19 | ~1921 |
| Mary Dugan | Spouse | — | 49 | ~1891 |
| Michael Dugan | Son | — | 23 | ~1917 |
Census Appearances
1930
Cook, Illinois
Spouse, age 42
Cook, Illinois · implied b. ~1888 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dugan |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| Naturalization Status | Naturalized |
| Year of Immigration | 1890 |
| Age at First Marriage | 26 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birthplace (normalized) | irish free state |
1940
Cook-County, Illinois
Spouse, age 49
Cook-County, Illinois · implied b. ~1891 — 8 household members
| Surname | Dugan |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Income (1939) | 0 |
| Highest Grade | 6 |
| 1935 Residence | Same House |
| Birthplace (normalized) | irish free state |
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 Dugan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Dugan
Spouse · 1940 · age 49 · b. ~1891 · 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-t0627-00959-00478)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Robert Lough | 42 | Head | Assistant Cashier | Illinois |
| 42 | Helen Lough | 42 | Wife | — | Illinois |
| 43 | Helen Lough | 18 | Daughter | — | Illinois |
| 44 | Robert Lough | 8 | Son | — | Illinois |
| 45 | Henry Bessmann | 60 | Head | Meat Butcher | Illinois |
| 46 | Emma Bessmann | 60 | Wife | — | Illinois |
| 47 | Leslie Schrader | 39 | Son-in-law | Payroll Supervisor | Illinois |
| 48 | Frances Schrader | 38 | Daughter | — | Illinois |
| 49 | Kent Schrader | 5 | Grandson | — | Illinois |
| 50 | Thomas Hough | 48 | Head | Bond Solicitor | Illinois |
| 51 | Marie Hough | 39 | Wife | — | Rumania |
| 52 | Frances Hough | 18 | Son | Shipping Clerk | Illinois |
| 53 | Robert Hough | 16 | Son | — | Illinois |
| 54 | Edward Hough | 14 | Son | — | Illinois |
| 55 | Valentine Larson | 52 | Head | Paving Inspector | Illinois |
| 56 | Mable Larson | 47 | Wife | — | Illinois |
| 57 | Evelyn Larson | 26 | Daughter | Biller | Illinois |
| 58 | Stella Larson | 25 | Daughter | File Clerk | Illinois |
| 59 | Stella Larson | 81 | Mother | — | Wisconsin |
| 60 | Robert F. Miles | 47 | Head | Executive | Illinois |
| 61 | Ada Miles | 48 | Wife | — | Illinois |
| 62 | Robert Miles | 24 | Son | Office Clerk | Illinois |
| 63 | Thomas Miles | 19 | Son | — | Illinois |
| 64 | John Dugan | 47 | Head | Laborer | Irish Free State |
| 65 | Mary Dugan THIS PERSON | 49 | Wife | — | Irish Free State |
| 66 | Robert Dugan | 19 | Son | N.Y.A. Clerk | Illinois |
| 67 | Terrence Dugan | 16 | Son | — | Illinois |
| 68 | Michael Dugan | 23 | Son | Repair Man | Illinois |
| 69 | Mary Dugan | 13 | Daughter | — | Illinois |
| 70 | Kathleen Dugan | 11 | Daughter | — | Illinois |
| 71 | Michael Jr. Dugan | 2 | Grandson | — | Illinois |
| 72 | Ray Anders | 31 | Head | Insurance Inspector | Illinois |
| 73 | Freda Anders | 30 | Wife | — | Illinois |
| 74 | Doris Anders | 7 | Daughter | — | Illinois |
| 75 | Robert Anders | 5 | Son | — | Illinois |
| 76 | Henry Karloski | 36 | Brother-in-law | Photo Engraver | Pennsylvania |
| 77 | John Gallagher | 38 | Head | Bailiff | Illinois |
| 78 | Stella Gallagher | 35 | Wife | — | Illinois |
| 79 | Joan Marie Gallagher | 7 | Daughter | — | Illinois |
| 80 | John Jr. Gallagher | 10 | Son | — | 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)