MC
Mary Corcoran — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Corcoran across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1890), then head of a 5-person household.
Age 50
b. ~1890
Female
Spouse
Born: Ireland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Corcoran |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Township / Ward | Chicago |
| Est. Birth Year | ~1890 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Corcoran | Spouse | — | 50 | ~1890 |
| Nora Corcoran | Daughter | — | 15 | ~1925 |
| Michael Corcoran | Head | — | 50 | ~1890 |
| Francis Corcoran | Daughter | — | 14 | ~1926 |
| Mary Corcoran | Daughter | — | 18 | ~1922 |
Census Appearances
1920
Cook, Illinois
Spouse, age 30
Cook, Illinois · implied b. ~1890 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Corcoran |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1908 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1930
Cook, Illinois
Spouse, age 40
Cook, Illinois · implied b. ~1890 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Corcoran |
| Given Name | Mary |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1920 |
| Age at First Marriage | 24 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Cook-County, Illinois
Spouse, age 50
Cook-County, Illinois · implied b. ~1890 — 5 household members
| Surname | Corcoran |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Income (1939) | 0 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| 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 Corcoran across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Corcoran
Spouse · 1940 · age 50 · b. ~1890 · 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-t0627-00981-00929)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Michael Corcoran | 50 | Head | Electrician | Ireland |
| 2 | Mary Corcoran THIS PERSON | 50 | Wife | — | Ireland |
| 3 | Mary Corcoran | 18 | Daughter | — | Illinois |
| 4 | Nora Corcoran | 15 | Daughter | — | Illinois |
| 5 | Francis Corcoran | 14 | Daughter | — | Illinois |
| 6 | George C. Patrick | 47 | Head | Fillagist | Iowa |
| 7 | Molly A. Patrick | 44 | Wife | — | Illinois |
| 8 | Marlow Patrick | 24 | Daughter | Tape Tape Operator | Illinois |
| 9 | Frances Patrick | 22 | Daughter | — | Illinois |
| 10 | Maurice Mulcahy | 38 | Lodger | Marker | Illinois |
| 11 | Frieda Mulcahy | 30 | Lodger | Secretary | Indiana |
| 12 | Mae Whelan | 60 | Roomer | Waitress | Illinois |
| 13 | Luella Whelan | 35 | Roomer | — | Illinois |
| 14 | Eldred English | 31 | Head | Collection Manager | Indiana |
| 15 | Edith English | 33 | Wife | — | Illinois |
| 16 | Henry Macbeth | 60 | Head | — | Iowa |
| 17 | Amanda Macbeth | 60 | Wife | — | Illinois |
| 18 | Olive Macbeth | 60 | Sister | Salesman | Illinois |
| 19 | Thomas Mcgovern | 65 | Head | Foreman | Ireland |
| 20 | Hannah Mcgovern | 61 | Wife | — | Ireland |
| 21 | Katherine Mcgovern | 38 | Daughter | Stenographer | Illinois |
| 22 | Thomas Rogers | 52 | Head | Electrician | Illinois |
| 23 | Mabel Rogers | 50 | Wife | — | Michigan |
| 24 | George Rogers | 28 | Son | Foundry Man | Illinois |
| 25 | Charles Rogers | 19 | Son | — | Illinois |
| 26 | Mary E. Stanton | 66 | Head | — | Illinois |
| 27 | Irene Stanton | 33 | Daughter | Stenographer | Illinois |
| 28 | Paul A. Newman | 40 | Head | Foreman | Illinois |
| 29 | Vera Newman | 38 | Wife | — | Illinois |
| 30 | Paul C. Newman | 3 | Son | — | Illinois |
| 31 | William Galvin | 51 | Head | Rodman | Montana |
| 32 | Mary L. Galvin | 51 | Wife | — | Wisconsin |
| 33 | William Galvin | 5 | Son | — | Illinois |
| 34 | Mary E. Ryan | 66 | Head | Filler | Illinois |
| 35 | Nelly Ryan | 77 | Sister | — | Illinois |
| 36 | Margaret M. Ryan | 17 | Niece | — | Illinois |
| 37 | Robert J. Carroll | 25 | Head | Fitter | Illinois |
| 38 | Betty J. Carroll | 19 | Wife | — | Illinois |
| 39 | Allen Noag | 42 | Head | Railroad Engineer | Michigan |
| 40 | Laura Noag | 39 | 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)