MC
Mary Cooper — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Columbia-County, Oregon
Our Model Tree links this Mary Cooper across the 1920, 1930 and 1940 US Censuses in Columbia-County, Oregon (XGBoost, ~Confirmed) — first a spouse (b.~1879), then head of a 3-person household.
Age 61
b. ~1879
Female
Spouse
Born: Kansas
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Columbia-County, Oregon |
| Surname | Cooper |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 61 |
| Marital Status | Married |
| Birthplace | Kansas |
| 1935 Residence (City) | Warren E. P. |
| 1935 Residence (County) | Columbia |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
| Township / Ward | Warren E P |
| Est. Birth Year | ~1879 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| William Cooper | Head | — | 72 | ~1868 |
| Curtis Cooper | Son | — | 40 | ~1900 |
| Mary Cooper | Spouse | — | 61 | ~1879 |
Census Appearances
1920
Columbia, Oregon
Spouse, age 40
Columbia, Oregon · implied b. ~1880 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Kansas |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Iowa |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1930
Columbia, Oregon
Spouse, age 51
Columbia, Oregon · implied b. ~1879 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Mary D |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Kansas |
| Age at First Marriage | 18 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1940
Columbia-County, Oregon
Spouse, age 61
Columbia-County, Oregon · implied b. ~1879 — 3 household members
| Surname | Cooper |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 61 |
| Marital Status | Married |
| Birthplace | Kansas |
| 1935 Residence (City) | Warren E. P. |
| 1935 Residence (County) | Columbia |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
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 Cooper across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Cooper
Spouse · 1940 · age 61 · b. ~1879 · Oregon
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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 — Columbia-County, Oregon
Open full size
1940 US Federal Census — Columbia-County, Oregon
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03357-00645)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Melvin H. West | 16 | Son | — | Oregon |
| 2 | Jean E. West | 12 | Daughter | — | Oregon |
| 3 | Carolyn M. West | 2 | Daughter | — | Oregon |
| 4 | James L. Gallogly | 39 | Head | Butcher | Nebraska |
| 5 | Annie E. Gallogly | 35 | Wife | — | Texas |
| 6 | Jennie M. Gallogly | 10 | Son | — | Arizona |
| 7 | Floyd R. Gallogly | 8 | Son | — | Arizona |
| 8 | Frances A. Gallogly | 4 | Daughter | — | Arizona |
| 9 | Oscar M. Johnson | 46 | Head | Contractor | Sweden |
| 10 | Bertha J. Johnson | 45 | Wife | — | Sweden |
| 11 | Thorsten M. Johnson | 19 | Son | Carpenter | Oregon |
| 12 | Gordon Johnson | 13 | Son | — | Oregon |
| 13 | Donald Johnson | 9 | Son | — | Oregon |
| 14 | Arthur L. Lindahl | 51 | Head | Farmer | Iowa |
| 15 | Esther H. Lindahl | 43 | Sister | — | Iowa |
| 16 | William E. Cooper | 72 | Head | Farmer | Missouri |
| 17 | Mary E. Cooper THIS PERSON | 61 | Wife | — | Kansas |
| 18 | Curtis R. Cooper | 40 | Son | Painter | Oregon |
| 19 | John A. Martin | 52 | Head | Pastor | Nebraska |
| 20 | Agnes J. Martin | 56 | Wife | — | Illinois |
| 21 | Douglas Martin | 18 | Son | — | Illinois |
| 22 | Lorraine Martin | 22 | Daughter | — | Illinois |
| 23 | Ray M. Morse | 34 | Head | Turbine Operator | Oregon |
| 24 | Beatrice A. Morse | 34 | Wife | Telephone Operator | Oregon |
| 25 | Walter T. Mugford | 29 | Head | Pastor | England |
| 26 | Corrinne G. Mugford | 24 | Wife | — | Oregon |
| 27 | Walter T. Jr. Mugford | 3 | Son | — | Oregon |
| 28 | Albert L. Larson | 74 | Head | Attendant | Sweden |
| 29 | Hannah E. Larson | 53 | Wife | — | Sweden |
| 30 | William E. Skarberg | 18 | Step-son | — | Oregon |
| 31 | Eleanor Bangs | 44 | Daughter | Nurse | Colorado |
| 32 | Mary A. Anderson | 51 | Head | Nurse | Nebraska |
| 33 | Alice Spies | 30 | Daughter | — | Nebraska |
| 34 | Amel | 36 | Son-in-law | Laborer | Oregon |
| 35 | Jacob Schmidt | 68 | Inmate | — | Germany |
| 36 | Edward Halling | 70 | Inmate | — | Oregon |
| 37 | Eloie S. Grate | 74 | Inmate | — | Wisconsin |
| 38 | Bergh Smith | 82 | Inmate | — | Wisconsin |
| 39 | August Ellis | 75 | Inmate | — | Wisconsin |
| 40 | Henry A. Larsen | 57 | Inmate | — | Minnesota |
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)