MC
Mary Cooper — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Pottawatomie-County, Kansas
Our Model Tree links this Mary Cooper across the 1920, 1930 and 1940 US Censuses in Pottawatomie-County, Kansas (XGBoost, ~Confirmed) — first a spouse (b.~1868), then head of a 3-person household.
Age 72
b. ~1868
Female
Spouse
Born: Ohio
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Pottawatomie-County, Kansas |
| Surname | Cooper |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 72 |
| Marital Status | Married |
| Birthplace | Ohio |
| 1935 Residence (City) | St. Marys city |
| 1935 Residence (County) | Pottawatomie |
| Additional Details | |
| Industry | 0 |
| Highest Grade | 5 |
| 1935 Residence | Same house |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Township / Ward | St Marys City |
| Est. Birth Year | ~1868 |
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 |
|---|---|---|---|---|
| Thomas Cooper | Head | — | 72 | ~1868 |
| John Cooper | Son | — | 38 | ~1902 |
| Mary Cooper | Spouse | — | 72 | ~1868 |
Census Appearances
1920
Pottawatomie, Kansas
Spouse, age 51
Pottawatomie, Kansas · implied b. ~1869 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Mary A |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Ohio |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | German |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Pottawatomie, Kansas
Spouse, age 62
Pottawatomie, Kansas · implied b. ~1868 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Ohio |
| Age at First Marriage | 26 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Pottawatomie-County, Kansas
Spouse, age 72
Pottawatomie-County, Kansas · implied b. ~1868 — 3 household members
| Surname | Cooper |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 72 |
| Marital Status | Married |
| Birthplace | Ohio |
| 1935 Residence (City) | St. Marys city |
| 1935 Residence (County) | Pottawatomie |
| Industry | 0 |
| Highest Grade | 5 |
| 1935 Residence | Same house |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 72 · b. ~1868 · Kansas
★ 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 — Pottawatomie-County, Kansas
Open full size
1940 US Federal Census — Pottawatomie-County, Kansas
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01252-00287)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Nellie Muckenthaler | 1 | Son | — | Kansas |
| 2 | Edward Graf | 24 | Head | Salesman | Kansas |
| 3 | Lorrayne Graf | 22 | Wife | — | Kansas |
| 4 | Edith Moss | 57 | Head | — | Kansas |
| 5 | John S Moss | 19 | Son | General Manager | Kansas |
| 6 | Paul Platt | 23 | Lodger | Manager | Kansas |
| 7 | Velon Platt | 21 | Lodger | — | Kansas |
| 8 | Jennie C Bross | 75 | Lodger | — | Illinois |
| 9 | Andrew Koppes | 70 | Head | Janitor | Kansas |
| 10 | Clemence Koppes | 66 | Wife | — | Belgium |
| 11 | Francis Harlan | 29 | Lodger | Commercial Music Teacher | Kansas |
| 12 | John Conlan | 68 | Head | Real Estate Agent | Illinois |
| 13 | Mary Conlan | 60 | Wife | — | Missouri |
| 14 | Dorothy Conlan | 26 | Daughter | Teacher | Kansas |
| 15 | J. J. Mcmullen | 32 | Head | Dentist | Kansas |
| 16 | Catherine Mcmullen | 30 | Wife | — | Kansas |
| 17 | C. Elaine Mcmullen | 3 | Daughter | — | Kansas |
| 18 | Marilyn Ann Mcmullen | 1 | Daughter | — | Kansas |
| 19 | Anthony Platt | 60 | Head | Painter Paper Hanger | Kansas |
| 20 | Catherine Platt | 61 | Wife | — | Kansas |
| 21 | Florence Platt | 20 | Daughter | New Worker | Kansas |
| 22 | Herman Baumchen | 43 | Head | Barber | Kansas |
| 23 | Alice Baumchen | 32 | Wife | — | Kansas |
| 24 | Mary Kathryn Baumchen | 8 | Daughter | — | Kansas |
| 25 | Achille D'Sonder | 68 | Head | — | Belgium |
| 26 | Alice D'Sonder | 40 | Sister | — | Kansas |
| 27 | Eugene Mcenroe | 35 | Head | Printer | Kansas |
| 28 | Marie Mcenroe | 37 | Wife | — | Kansas |
| 29 | Jeanne Mcenroe | 11 | Daughter | — | Kansas |
| 30 | John Mcenroe | 9 | Son | — | Kansas |
| 31 | Paul Mcclain | 38 | Head | Barber | Kansas |
| 32 | Ella Pearl Mcclain | 38 | Wife | — | Kansas |
| 33 | Paul Jr Mcclain | 13 | Son | — | Colorado |
| 34 | Frank Mcclain | 13 | Son | — | Missouri |
| 35 | Roderick Mcclain | 10 | Son | — | Kansas |
| 36 | Lawrence Mcclain | 7 | Son | — | Kansas |
| 37 | E. Patrick Mcclain | 4 | Son | — | Kansas |
| 38 | Thomas Cooper | 72 | Head | — | Wisconsin |
| 39 | Mary Cooper THIS PERSON | 72 | Wife | — | Ohio |
| 40 | John Cooper | 38 | Son | Laborer | Kansas |
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)