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Mary Mcclain — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Marion-County, Oregon
Our Model Tree links this Mary Mcclain across the 1930 and 1940 US Censuses in Marion-County, Oregon (XGBoost, ~Confirmed) — first a daughter (b.~1925), then head of a 5-person household.
Age 15
b. ~1925
Female
Daughter
Born: Oregon
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Oregon |
| Surname | McClain |
| Given Name | Mary L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Oregon |
| 1935 Residence (City) | Salem City |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Industry | New Worker |
| Highest Grade | Hs 3 |
| 1935 Residence | Same house |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
| Township / Ward | Salem City |
| Est. Birth Year | ~1925 |
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 |
|---|---|---|---|---|
| Sadie Mcclain | Spouse | — | 50 | ~1890 |
| Henry Mcclain | Son | — | 20 | ~1920 |
| Lucretia Mcclain | Daughter | — | 21 | ~1919 |
| Mary Mcclain | Daughter | — | 15 | ~1925 |
| Ivan Mcclain | Head | — | 52 | ~1888 |
Census Appearances
1930
Marion, Oregon
Daughter, age 5
Marion, Oregon · implied b. ~1925 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McClain |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Oregon |
| Father's Birthplace | Oregon |
| Mother's Birthplace | Kansas |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
1940
Marion-County, Oregon
Daughter, age 15
Marion-County, Oregon · implied b. ~1925 — 5 household members
| Surname | McClain |
| Given Name | Mary L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Oregon |
| 1935 Residence (City) | Salem City |
| 1935 Residence (County) | Marion |
| Industry | New Worker |
| Highest Grade | Hs 3 |
| 1935 Residence | Same house |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
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 Mcclain across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mcclain
Daughter · 1940 · age 15 · b. ~1925 · Oregon
★ You are viewing this record
Sibling
Henry Mcclain
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lucretia Mcclain
Sibling · 1940 · age 21
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 — Marion-County, Oregon
Open full size
1940 US Federal Census — Marion-County, Oregon
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03375-00277)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Delbert A Wright | 22 | Son | Picker Tender | Oregon |
| 42 | Russell L Wright | 58 | Head | Tractor Driver | Indiana |
| 43 | Florence M Wright | 52 | Wife | — | Nebraska |
| 44 | John W Hellenbrand | 85 | Head | — | Maine |
| 45 | Leona A Hellenbrand | 83 | Wife | — | Oregon |
| 46 | Ivan E Mcclain | 52 | Head | Yard Captain | Oregon |
| 47 | Sadie H Mcclain | 50 | Wife | — | Kansas |
| 48 | Lucretia A Mcclain | 21 | Daughter | Cannery Worker | Oregon |
| 49 | Henry H Mcclain | 20 | Son | Mill Work | Oregon |
| 50 | Mary L Mcclain THIS PERSON | 15 | Daughter | — | Oregon |
| 51 | Albert Oehler | 74 | Head | — | Iowa |
| 52 | Helen M Oehler | 68 | Wife | — | Iowa |
| 53 | Selma H Oehler | 44 | Daughter | Nurse | Minnesota |
| 54 | Ione L Oehler | 24 | Daughter | Teacher | Iowa |
| 55 | Ansel L Carnegie | 51 | Head | Mechanic | Minnesota |
| 56 | Myrtle L Carnegie | 40 | Wife | — | Massachusetts |
| 57 | Burton E Carnegie | 16 | Son | — | Idaho |
| 58 | Earl D Carnegie | 14 | Son | — | Oregon |
| 59 | Emory C De Hart | 42 | Head | Machinist | Kansas |
| 60 | Hazel M De Hart | 41 | Wife | — | Nebraska |
| 61 | Kenneth E De Hart | 14 | Son | — | Nebraska |
| 62 | Emory T Wood | 32 | Head | Lineman | Oregon |
| 63 | Mary A Wood | 32 | Wife | — | Texas |
| 64 | Lawrence Wood | 4 | Son | — | Oregon |
| 65 | Janice E Wood | 1 | Daughter | — | Oregon |
| 66 | Keith G Morris | 44 | Head | Restaurant Owner | Iowa |
| 67 | Elsie E Morris | 38 | Wife | — | Oregon |
| 68 | Keith D Morris | 13 | Son | — | Oregon |
| 69 | Clarence J Hamilton | 30 | Head | Salesman | Oregon |
| 70 | Margaret S Hamilton | 28 | Wife | — | Oregon |
| 71 | Hamilton | None | — | — | — |
| 72 | John Hendrickson | 74 | Head | Janitor | Sweden |
| 73 | Hendrickson | 66 | Wife | — | Minnesota |
| 74 | Effie Mathis | 54 | Head | Housework | Kansas |
| 75 | Myrtle Mathis | 26 | Daughter | Junior Clerk | Missouri |
| 76 | Mathis | None | — | — | — |
| 77 | James T Murphy | 37 | Head | Salesman | Texas |
| 78 | Almina J Murphy | 34 | Wife | — | Minnesota |
| 79 | James W Murphy | 4 | Son | — | California |
| 80 | Oscar H Donaldson | 53 | Head | Overseer Spinning Room | Sweden |
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)