MC
Mary Cox — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Johnson-County, Missouri
Our Model Tree links this Mary Cox across the 1920, 1930 and 1940 US Censuses in Johnson-County, Missouri (XGBoost, ~Confirmed) — first a head (b.~1869), then head of a 6-person household.
Age 71
b. ~1869
Female
Head
Born: Missouri
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Johnson-County, Missouri |
| Surname | Cox |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 71 |
| Marital Status | Widowed |
| Birthplace | Missouri |
| 1935 Residence (City) | Post Oak Twp. |
| 1935 Residence (County) | Johnson |
| Additional Details | |
| Industry | Farmer |
| Class of Worker | OA |
| Hours Worked | 30 |
| Income (1939) | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Township / Ward | Post Oak Twp |
| Est. Birth Year | ~1869 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Velma Clark | Daughter | — | 36 | ~1904 |
| Mary Clark | Daughter | — | 13 | ~1927 |
| Anne Clark | Daughter | — | 11 | ~1929 |
| Mary Cox | Head | — | 71 | ~1869 |
| Dwight Clark | Son | — | 10 | ~1930 |
| Merrill Clark | Son | — | 6 | ~1934 |
Census Appearances
1920
Johnson, Missouri
Spouse, age 54
Johnson, Missouri · implied b. ~1866 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cox |
| Given Name | Mary A |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Missouri |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1930
Johnson, Missouri
Other, age 61
Johnson, Missouri · implied b. ~1869 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cox |
| Given Name | Mary A |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 61 |
| Marital Status | Married |
| Birthplace | Missouri |
| Age at First Marriage | 21 |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Can Read/Write | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
Johnson-County, Missouri
Head, age 71
Johnson-County, Missouri · implied b. ~1869 — 6 household members
| Surname | Cox |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 71 |
| Marital Status | Widowed |
| Birthplace | Missouri |
| 1935 Residence (City) | Post Oak Twp. |
| 1935 Residence (County) | Johnson |
| Industry | Farmer |
| Class of Worker | OA |
| Hours Worked | 30 |
| Income (1939) | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
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 Cox across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Cox
Head · 1940 · age 71 · b. ~1869 · Missouri
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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 — Johnson-County, Missouri
Open full size
1940 US Federal Census — Johnson-County, Missouri
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-02120-00327)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Rosco Blaylock | 52 | Head | General | Missouri |
| 2 | Mariah Blaylock | 78 | Mother | — | Pennsylvania |
| 3 | Howard Oscar Wiley | 37 | Head | Laborer | Kansas |
| 4 | Violet Mae Wiley | 34 | Wife | — | Missouri |
| 5 | Milton Don Wiley | 13 | Son | — | Missouri |
| 6 | Russell Howard Wiley | 8 | Son | — | Missouri |
| 7 | Franklin Oscar Wiley | 2 | Son | — | Missouri |
| 8 | Don Des Combes | 27 | Head | Tenant Farmer | Missouri |
| 9 | Gayle Ann Des Combes | 17 | Wife | — | Missouri |
| 10 | Heints John Egbert | 44 | Head | Blind | Missouri |
| 11 | Henrietta Egbert | 40 | Wife | — | Missouri |
| 12 | Washington Lee James | 63 | Head | Small | Missouri |
| 13 | Mattie James | 58 | Wife | — | Missouri |
| 14 | Ugene Keith James | 18 | Son | — | Missouri |
| 15 | Virginia Mary James | 15 | Daughter | — | Missouri |
| 16 | Clarence Layton | 37 | Head | Tenant Farmer | Missouri |
| 17 | Irene Gertrude Layton | 32 | Wife | — | Missouri |
| 18 | Richard Alvin Hobson | 54 | Head | General | Virginia |
| 19 | May Jessie Hobson | 43 | Wife | — | Missouri |
| 20 | Edna May Hobson | 18 | Daughter | — | Missouri |
| 21 | Mary Lee Hobson | 15 | Daughter | — | Missouri |
| 22 | Patricia Ann Hobson | 2 | Daughter | — | Missouri |
| 23 | Samuel Ora Cramer | 49 | Head | Small | Missouri |
| 24 | Jewell Bessie Cramer | 33 | Wife | — | Missouri |
| 25 | Wilber James Cramer | 20 | Son | Farm | Missouri |
| 26 | William Henry Cramer | 15 | Son | — | Missouri |
| 27 | Martha Lorretta Cramer | 11 | Daughter | — | Missouri |
| 28 | Lee Edward Cramer | 8 | Son | — | Missouri |
| 29 | Ora Jewell Cramer | 5 | Daughter | — | Missouri |
| 30 | Francis Samuel Cramer | 3 | Son | — | Missouri |
| 31 | Harlan Elbert Cramer | 1 | Son | — | Missouri |
| 32 | Mary Cox THIS PERSON | 71 | Head | — | Missouri |
| 33 | Velma Mrs Clark | 36 | Daughter | — | Missouri |
| 34 | Mary Virginia Clark | 13 | Daughter | — | Missouri |
| 35 | Anne Dorthy Clark | 11 | Daughter | — | Missouri |
| 36 | Dwight Lindell Clark | 10 | Son | — | Missouri |
| 37 | Merrill Dee Clark | 6 | Son | — | Missouri |
| 38 | William Amiel Christian | 35 | Head | Tenant Farmer | Missouri |
| 39 | Daisy Christian | 38 | Wife | — | Missouri |
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)