MH
Mary Harper — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Camden-County, Missouri
Our Model Tree links this Mary Harper across the 1920, 1930 and 1940 US Censuses in Camden-County, Missouri (XGBoost, ~Confirmed) — first a head (b.~1870), then head of a 4-person household.
Age 70
b. ~1870
Female
Head
Born: Missouri
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Camden-County, Missouri |
| Surname | Harper |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 70 |
| Marital Status | Widowed |
| Birthplace | Missouri |
| 1935 Residence (City) | Osage |
| 1935 Residence (County) | Osage |
| Additional Details | |
| Occupation | Manager |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 30 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Occupation | Manager |
| Township / Ward | Osage |
| Est. Birth Year | ~1870 |
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 |
|---|---|---|---|---|
| Lora Harper | Daughter | — | 31 | ~1909 |
| Mary Harper | Daughter | — | 18 | ~1922 |
| Mary Harper | Head | — | 70 | ~1870 |
| Clifford Harper | Son | — | 33 | ~1907 |
Census Appearances
1920
Camden, Missouri
Spouse, age 46
Camden, Missouri · implied b. ~1874 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harper |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Missouri |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1930
Camden, Missouri
Spouse, age 60
Camden, Missouri · implied b. ~1870 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harper |
| Given Name | Mary J. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Missouri |
| Age at First Marriage | 21 |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Can Read/Write | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
Camden-County, Missouri
Head, age 70
Camden-County, Missouri · implied b. ~1870 — 4 household members
| Surname | Harper |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 70 |
| Marital Status | Widowed |
| Birthplace | Missouri |
| 1935 Residence (City) | Osage |
| 1935 Residence (County) | Osage |
| Occupation | Manager |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 30 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| 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 Harper 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 Harper
Head · 1940 · age 70 · b. ~1870 · 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 — Camden-County, Missouri
Open full size
1940 US Federal Census — Camden-County, Missouri
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02092-00867)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Acre, Margaret H. Yotter | 34 | Wife | Operator | Missouri |
| 42 | Templeton, Florence Yotter | 28 | Servant | Waitress | Missouri |
| 43 | Eugene Whaley | 27 | Head | Laborer | Missouri |
| 44 | Mary Whaley | 24 | Wife | Housekeeper | Kansas |
| 45 | Harry Burton Whaley | 1 | Son | — | Missouri |
| 46 | Cora Whaley | 62 | Mother | — | Missouri |
| 47 | Oliver E. Cavin | 46 | Head | Manager | Missouri |
| 48 | Lissie Cavin | 49 | Wife | — | Missouri |
| 49 | Drew Alexander | 90 | Head | — | Missouri |
| 50 | Claude Pemberton | 45 | Head | Carpenter | Missouri |
| 51 | Gladys Pemberton | 37 | Wife | — | Missouri |
| 52 | Dorothy Mae Pemberton | 18 | Daughter | — | Oklahoma |
| 53 | Thomas Williams | 70 | Head | — | Iowa |
| 54 | Edith Williams | 57 | Wife | — | Missouri |
| 55 | Thomas H. Forrester | 62 | Head | Operator | Illinois |
| 56 | Ida Mae Forrester | 59 | Wife | — | Missouri |
| 57 | Thomas Forrester | 35 | Head | Proprietor | Missouri |
| 58 | Myrtle Forrester | 33 | Wife | Housekeeper | Oklahoma |
| 59 | John R. Yelton | 75 | Head | — | Tennessee |
| 60 | Bettie Jane Yelton | 63 | Wife | — | Missouri |
| 61 | Mary Harper THIS PERSON | 70 | Head | Manager | Missouri |
| 62 | Clifford Harper | 33 | Son | Operator | Missouri |
| 63 | Lora Harper | 31 | Daughter | Housekeeper | Missouri |
| 64 | Mary Harper | 18 | Daughter | Operator | Missouri |
| 65 | Louise Webbert | 64 | Head | — | Louisiana |
| 66 | William D. Jeffries | 63 | Head | — | Missouri |
| 67 | Yalovia Jeffries | 58 | Wife | — | Missouri |
| 68 | Frank Jeffries | 39 | Son | Operator | Missouri |
| 69 | Olive Jeffries | 34 | Daughter | Operator | Missouri |
| 70 | Nellie Jeffries | 24 | Daughter | Operator | Missouri |
| 71 | Farris Jeffries | 16 | Son | — | Missouri |
| 72 | Burl Blankenship | 30 | Head | Truck Driver | Missouri |
| 73 | Nadine Blankenship | 21 | Wife | — | Missouri |
| 74 | Charles Hymes | 53 | Head | Manager | Missouri |
| 75 | Hazel Hymes | 52 | Wife | Housekeeper | Missouri |
| 76 | Charles Jr. Hymes | 19 | Son | — | Kansas |
| 77 | Ruth Louise Hymes | 14 | Daughter | — | Kansas |
| 78 | Richard Bradley | 65 | Head | Carpenter | Tennessee |
| 79 | Harvey Gore | 64 | Head | Operator | Iowa |
| 80 | Winifred Gore | 62 | Wife | — | Wisconsin |
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)