MC
Mary Corcoran — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Ogle-County, Illinois
Our Model Tree links this Mary Corcoran across the 1930 and 1940 US Censuses in Ogle-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1894), then head of a 11-person household.
Age 46
b. ~1894
Female
Spouse
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Ogle-County, Illinois |
| Surname | Corcoran |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Oregon City |
| 1935 Residence (County) | Ogle |
| Additional Details | |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Oregon City |
| Est. Birth Year | ~1894 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Ralph Corcoran | Son | — | 3 | ~1937 |
| Viola Naffzinger | Other | — | 19 | ~1921 |
| Kenneth Corcoran | Head | — | 52 | ~1888 |
| William Michaels | Other | — | 58 | ~1882 |
| Gerald Corcoran | Son | — | 13 | ~1927 |
| William Riley | Other | — | 14 | ~1926 |
| Kenneth Corcoran | Son | — | 16 | ~1924 |
| Thomas Corcoran | Son | — | 12 | ~1928 |
| Clara Belthome | Other | — | 80 | ~1860 |
| Mary Corcoran | Spouse | — | 46 | ~1894 |
| Robert Corcoran | Son | — | 12 | ~1928 |
Census Appearances
1930
Ogle, Illinois
Spouse, age 34
Ogle, Illinois · implied b. ~1896 — 20 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Corcoran |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 17 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Ogle-County, Illinois
Spouse, age 46
Ogle-County, Illinois · implied b. ~1894 — 11 household members
| Surname | Corcoran |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Oregon City |
| 1935 Residence (County) | Ogle |
| Highest Grade | No 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 Corcoran across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Corcoran
Spouse · 1940 · age 46 · b. ~1894 · 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 — Ogle-County, Illinois
Open full size
1940 US Federal Census — Ogle-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00863-00642)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Irvan Mcroberts | 48 | Head | Spray Man | Missouri |
| 2 | Sadie Mcroberts | 47 | Wife | Waitress | Illinois |
| 3 | Kenneth Corcoran | 52 | Head | Janitor | Illinois |
| 4 | Mary Corcoran THIS PERSON | 46 | Wife | — | Illinois |
| 5 | Kenneth Jr Corcoran | 16 | Son | New Worker | Illinois |
| 6 | Gerald Corcoran | 13 | Son | — | Illinois |
| 7 | Thomas Corcoran | 12 | Son | — | Illinois |
| 8 | Robert Corcoran | 12 | Son | — | Illinois |
| 9 | Ralph Corcoran | 3 | Son | — | Illinois |
| 10 | William Riley | 14 | Step-son | — | Illinois |
| 11 | Clara Belthome | 80 | Mother | — | Germany |
| 12 | Viola Naffzinger | 19 | Maid | Maid | Colorado |
| 13 | William Michaels | 58 | Lodger | — | Iowa |
| 14 | Earl Frey | 24 | Head | Planer | Iowa |
| 15 | Lillian Frey | 19 | Wife | — | Illinois |
| 16 | Dorothy Taft | 33 | Head | — | Connecticut |
| 17 | Tilman Taft | 11 | Son | — | New York |
| 18 | William Taft | 22 | Head | Molder | Illinois |
| 19 | Lois Taft | 20 | Wife | — | Illinois |
| 20 | A. J. Behr | 40 | Head | Proprietor | Poland |
| 21 | Clara Behr | 34 | Wife | — | Russia |
| 22 | Lillian Behr | 13 | Daughter | — | Illinois |
| 23 | Evelyn Behr | 12 | Daughter | — | Illinois |
| 24 | Benj Ronald Behr | 6 | Son | — | Illinois |
| 25 | John Jansen | 60 | Head | Night Watchman | Germany |
| 26 | Maude Jansen | 59 | Wife | — | Illinois |
| 27 | E. H. Thinny | 79 | Head | — | England |
| 28 | Anna Thinny | 78 | Wife | — | Canada |
| 29 | Edna Thinny | 48 | Daughter | Line & Tape Operator | Illinois |
| 30 | Henry Smith | 39 | Head | Belt Cleaner | Illinois |
| 31 | Shirley Smith | 12 | Daughter | — | Illinois |
| 32 | Robert Smith | 10 | Son | — | Illinois |
| 33 | Forrest Francis | 35 | Head | Laborer | Illinois |
| 34 | Laurine Francis | 28 | Wife | — | Illinois |
| 35 | Wanda Lee Francis | 10 | Daughter | — | Illinois |
| 36 | Patsy Ann Francis | 9 | Daughter | — | Illinois |
| 37 | Edgar Westendorf | 15 | Brother-in-law | — | Illinois |
| 38 | Sam Greenblatt | 60 | Head | — | Russia |
| 39 | Jennie Greenblatt | 60 | Wife | — | Russia |
| 40 | Lewis Steinhagen | 53 | Head | — | 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)