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Mary Mccoy — 1940 US Census Record
Model Tree available1940 United States Federal Census · Jefferson-County, Kansas
Our Model Tree links this Mary Mccoy across the 1920, 1930 and 1940 US Censuses in Jefferson-County, Kansas (XGBoost, ~Confirmed), with identified parents Arch & Ura — first a daughter (b.~1914), then head of a 4-person household.
Age 26
b. ~1914
Female
Daughter
Born: Kansas
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Kansas |
| Surname | McCoy |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Kansas |
| 1935 Residence (City) | Rock Creek Township |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Occupation | Housekeeper |
| Industry | Private family |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 150 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
| Occupation | Housekeeper |
| Township / Ward | Rock Creek Township |
| Est. Birth Year | ~1914 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Mccoy | Daughter | — | 26 | ~1914 |
| Arch Mccoy | Head | — | 65 | ~1875 |
| Elmer Montgomery | Other | — | 47 | ~1893 |
| Mabel Mccoy | Spouse | — | 61 | ~1879 |
Census Appearances
1920
Jefferson, Kansas
Daughter, age 5
Jefferson, Kansas · implied b. ~1915 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCoy |
| Given Name | Mary A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Kansas |
| Father's Birthplace | Kansas |
| Mother's Birthplace | Kansas |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1930
Jefferson, Kansas
Daughter, age 16
Jefferson, Kansas · implied b. ~1914 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCoy |
| Given Name | Mary A. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Kansas |
| Father's Birthplace | Kansas |
| Mother's Birthplace | Kansas |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1940
Jefferson-County, Kansas
Daughter, age 26
Jefferson-County, Kansas · implied b. ~1914 — 4 household members
| Surname | McCoy |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Kansas |
| 1935 Residence (City) | Rock Creek Township |
| 1935 Residence (County) | Jefferson |
| Occupation | Housekeeper |
| Industry | Private family |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 150 |
| Highest Grade | H-4 |
| 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 Mccoy across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Arch Mccoy (~0.92 confidence) and father Ura Mccoy (~0.92 confidence) and mother Mabel Mccoy (~0.92 confidence) and mother S Mccoy (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Arch Mccoy
b. ~1875
Source father
● Household
· direct · ~0.92
Father
Ura Mccoy
b. ~1875
Source father
● Household
· direct · ~0.92
Mother
Mabel Mccoy
b. ~1879
Source mother
● Household
· direct · ~0.92
Mother
S Mccoy
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Mccoy
Daughter · 1940 · age 26 · b. ~1914 · 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 — Jefferson-County, Kansas
Open full size
1940 US Federal Census — Jefferson-County, Kansas
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01236-00273)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Clarence Chacey | 27 | Son | Mechanic (Auto) | Kansas |
| 42 | Charles Chacey | 63 | Brother | Farmer | Ohio |
| 43 | Merrill Chacey | 50 | Brother | Farm Laborer | Kansas |
| 44 | Roy Myers | 38 | Head | Rented & Owned Farm | Kansas |
| 45 | Clara Myers | 40 | Wife | — | Kansas |
| 46 | Donald Myers | 15 | Son | — | Kansas |
| 47 | Charles Myers | 11 | Son | — | Kansas |
| 48 | Dorothy Myers | 4 | Daughter | — | Kansas |
| 49 | David I Mair | 59 | Head | Laborer | Kansas |
| 50 | Lena Swickard | 63 | Head | Farmer | Ohio |
| 51 | Maynard Swickard | 31 | Son | Farmer | Kansas |
| 52 | Lawrence Rhodes | 22 | Hired hand | Farm | Kansas |
| 53 | Arch B. Mccoy | 65 | Head | Farmer | Kansas |
| 54 | Mabel Mccoy | 61 | Wife | — | Kansas |
| 55 | Mary Mccoy THIS PERSON | 26 | Daughter | Housekeeper | Kansas |
| 56 | Elmer Montgomery | 47 | Lodger | Farm Laborer | Kansas |
| 57 | Carl Haake | 37 | Head | Farmer | Iowa |
| 58 | Vera Haake | 31 | Wife | — | Washington |
| 59 | Dorothy Jean Haake | 11 | Daughter | — | Kansas |
| 60 | Elizabeth Ann Haake | 9 | Daughter | — | Kansas |
| 61 | Barbara Sue Haake | 6 | Daughter | — | Kansas |
| 62 | Robert Haake | 23 | Head | Veterinary Student | Kansas |
| 63 | Claude Cook | 42 | Head | Farmer | Kansas |
| 64 | Mabel Cook | 32 | Wife | — | Kansas |
| 65 | Orville Cook | 11 | Son | — | Kansas |
| 66 | Harvey Murdie | 32 | Head | Rented Farm | Kansas |
| 67 | Opal Murdie | 30 | Wife | 0 | Kansas |
| 68 | David Murdie | 5 | Son | — | Kansas |
| 69 | Myrtle Murdie | 3 | Daughter | — | Kansas |
| 70 | Hinkle Hodecap | 65 | Head | Farm Laborer | Kansas |
| 71 | Lattimer Potts | 73 | Head | Farmer | Kansas |
| 72 | Mary F Rice | 69 | Lodger | Farmers Home | Pennsylvania |
| 73 | Elmer Marks | 68 | Head | Farmer | Kansas |
| 74 | Josephine Marks | 66 | Wife | — | Indiana |
| 75 | John Epler | 43 | Head | Paperhanger & Painter | Nebraska |
| 76 | Julia Epler | 36 | Wife | — | Kansas |
| 77 | Carl Epler | 12 | Son | — | Kansas |
| 78 | Elmer Epler | 7 | Son | — | Kansas |
| 79 | George Dellinger | 58 | Head | Farmer | Kansas |
| 80 | Pearl Dellinger | 51 | Wife | — | Kansas |
Pedigree Summary
Mary
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
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)