MC
Mary Cleary — 1940 US Census Record
Linked across censuses1940 United States Federal Census · St.-Clair-County, Illinois
Our Model Tree links this Mary Cleary across the 1930 and 1940 US Censuses in St.-Clair-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 7-person household.
Age 12
b. ~1928
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Clair-County, Illinois |
| Surname | Cleary |
| Given Name | Mary Adele |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | East St. Louis |
| 1935 Residence (County) | St. Clair |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | East St Louis |
| Est. Birth Year | ~1928 |
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 |
|---|---|---|---|---|
| Mary Cleary | Daughter | — | 12 | ~1928 |
| Corinne Cleary | Daughter | — | 11 | ~1929 |
| Pauline Britt | Spouse | — | 32 | ~1908 |
| Curtis Britt | Head | — | 30 | ~1910 |
| Loretta Britt | Daughter | — | 3 | ~1937 |
| Melvin Cleary | Son | — | 5 | ~1935 |
| Curtis Britt | Son | — | 2 | ~1938 |
Census Appearances
1930
St Clair, …
Other, age 1
St Clair, Illinois · implied b. ~1929 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cleary |
| Given Name | Mary Adele |
| Relationship to Head | Gr Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
St.-Clair-County, Illinois
Daughter, age 12
St.-Clair-County, Illinois · implied b. ~1928 — 7 household members
| Surname | Cleary |
| Given Name | Mary Adele |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | East St. Louis |
| 1935 Residence (County) | St. Clair |
| Highest Grade | No 6 |
| 1935 Residence | Same house |
| 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 Cleary across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Cleary
Daughter · 1940 · age 12 · b. ~1928 · Illinois
★ You are viewing this record
Sibling
Loretta Britt
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Melvin Cleary
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Curtis Britt
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Corinne Cleary
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — St.-Clair-County, Illinois
Open full size
1940 US Federal Census — St.-Clair-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00881-00873)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Otto Haffarth | 54 | Brother-in-law | Watchman | Illinois |
| 42 | Edward Urbock | 31 | Head | Manager | Illinois |
| 43 | Valeta Urbock | 30 | Wife | — | Illinois |
| 44 | Robert Urbock | 2 | Son | — | Missouri |
| 45 | One Entry Black Urbock | None | — | — | — |
| 46 | Charles A. Lehman | 38 | Head | Tinner | Germany |
| 47 | Josephine Lehman | 35 | Wife | — | Illinois |
| 48 | J. Edgar Lehman | 33 | Son | — | Illinois |
| 49 | Leonard Oatts | 33 | Head | Fireman | Indiana |
| 50 | Ethel Oatts | 30 | Wife | Meat Packer | Illinois |
| 51 | Laura Johnston | 57 | Mother-in-law | — | Pennsylvania |
| 52 | Delores Kearns | 11 | Step-child | — | Illinois |
| 53 | Dorothy Kearns | 10 | Step-child | — | Illinois |
| 54 | Florence Kearns | 6 | Step-child | — | Illinois |
| 55 | Lorrain Eberle | 21 | Head | Chauffer | Illinois |
| 56 | Gladys Eberle | 20 | Wife | Saleswoman | Missouri |
| 57 | John W. Davison | 57 | Head | — | England |
| 58 | Elizabeth Ellen Davison | 59 | Wife | — | England |
| 59 | Herbert Clover | 25 | Head | Machine Moulder | Illinois |
| 60 | Virginia Clover | 19 | Wife | — | Illinois |
| 61 | Stanley Brzostowski | 27 | Head | Laborer | Illinois |
| 62 | Virginia Brzostowski | 26 | Wife | — | Missouri |
| 63 | Frank Elsik | 46 | Head | Laborer | Illinois |
| 64 | Elsie Elsik | 46 | Wife | Clerk | Missouri |
| 65 | John P. O'Donnell | 44 | Head | Steam Fitter | Illinois |
| 66 | Anna O'Donnell | 41 | Wife | — | Florida |
| 67 | Benjamin O'Donnell | 19 | Son | New Worker | Illinois |
| 68 | Geraldine O'Donnell | 12 | Daughter | — | Illinois |
| 69 | Otto Krause | 59 | Head | Carpenter | Germany |
| 70 | Effie Krause | 55 | Wife | — | Kentucky |
| 71 | Extra Line Krause | None | — | — | — |
| 72 | Raymond Cadmus | 41 | Head | Salesman | Illinois |
| 73 | Edna Cadmus | 41 | Wife | — | Illinois |
| 74 | Curtis Britt | 30 | Head | Sand Perator | Kentucky |
| 75 | Pauline Britt | 32 | Wife | — | Illinois |
| 76 | Mary Adele Cleary THIS PERSON | 12 | Daughter | — | Illinois |
| 77 | Corinne Cleary | 11 | Daughter | — | Illinois |
| 78 | Melvin Cleary | 5 | Son | — | Illinois |
| 79 | Loretta Britt | 3 | Daughter | — | Illinois |
| 80 | Curtis Jr. Britt | 2 | 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)