MH
Mary Harper — 1940 US Census Record
Model Tree available1940 United States Federal Census · Shelby-County, Indiana
Our Model Tree links this Mary Harper across the 1920, 1930 and 1940 US Censuses in Shelby-County, Indiana (XGBoost, ~Confirmed), with identified parents John & John — first a daughter (b.~1918), then head of a 5-person household.
Age 22
b. ~1918
Female
Daughter
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Shelby-County, Indiana |
| Surname | Harper |
| Given Name | Mary Ann |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Hanover Township |
| 1935 Residence (County) | Shelby |
| Additional Details | |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | C 3 |
| 1935 Residence | Same house |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Township / Ward | Hanover Township |
| Est. Birth Year | ~1918 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Harper | Daughter | — | 22 | ~1918 |
| Martha Harper | Daughter | — | 15 | ~1925 |
| John Harper | Head | — | 64 | ~1876 |
| Thomas Harper | Son | — | 25 | ~1915 |
| Ruth Harper | Spouse | — | 47 | ~1893 |
Census Appearances
1920
Shelby, Indiana
Daughter, age 2
Shelby, Indiana · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harper |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Shelby, Indiana
Daughter, age 12
Shelby, Indiana · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harper |
| Given Name | Mary Ann |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Shelby-County, Indiana
Daughter, age 22
Shelby-County, Indiana · implied b. ~1918 — 5 household members
| Surname | Harper |
| Given Name | Mary Ann |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Hanover Township |
| 1935 Residence (County) | Shelby |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | C 3 |
| 1935 Residence | Same house |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
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. Identified parents: father John Harper (~0.92 confidence) and father John Harper (~0.92 confidence) and mother Ruth Harper (~0.92 confidence) and mother Ruth Harper (~0.92 confidence) and father John Harper (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Harper
b. ~1876
Source father
● Household
· direct · ~0.92
Father
John Harper
b. ~1876
Source father
● Household
· direct · ~0.92
Mother
Ruth Harper
b. ~1878
Source mother
● Household
· direct · ~0.92
Mother
Ruth Harper
b. ~1893
Source mother
● Household
· direct · ~0.92
Father
John Harper
b. ~1897
Source father
● Household
· direct · ~0.92
This person
Anchor record
Mary Harper
Daughter · 1940 · age 22 · b. ~1918 · Indiana
★ You are viewing this record
Sibling
Thomas Harper
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Martha Harper
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Shelby-County, Indiana
Open full size
1940 US Federal Census — Shelby-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01094-00680)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Harold Myer | 45 | Head | — | Indiana |
| 2 | Roger Myer | 4 | Son | — | Indiana |
| 3 | Oscar Newton | 25 | Head | Farm Hand | Kentucky |
| 4 | Gladys Newton | 22 | Wife | — | Kentucky |
| 5 | Doris R. Newton | 2 | Daughter | — | Kentucky |
| 6 | Melvin Dearinger | 26 | Head | Farm Hand | Indiana |
| 7 | Mary Dearinger | 23 | Wife | — | Pennsylvania |
| 8 | Karen Dearinger | 1 | Daughter | — | Indiana |
| 9 | Mary J. Talbert | 76 | Head | — | Indiana |
| 10 | Eva Talbert | 45 | Daughter | Sales Woman | Indiana |
| 11 | Herbert Myer | 62 | Head | — | Indiana |
| 12 | Essie Myer | 57 | Wife | — | Indiana |
| 13 | William Kemper | 67 | Head | Farmer | Indiana |
| 14 | Pauline Mcconnell | 27 | Daughter | — | Indiana |
| 15 | Albert Mcconnell | 30 | Son-in-law | Engineer | Indiana |
| 16 | John A. Held | 53 | Head | R.F.D. Carrier | Indiana |
| 17 | Gladys M. Held | 45 | Wife | — | Indiana |
| 18 | Jean Held | 20 | Daughter | — | Indiana |
| 19 | Rebecca Held | 18 | Daughter | — | Indiana |
| 20 | Patricia Held | 16 | Daughter | — | Indiana |
| 21 | Barbara Held | 14 | Daughter | — | Indiana |
| 22 | Thomas Held | 12 | Son | — | Indiana |
| 23 | Robert Held | 11 | Son | — | Indiana |
| 24 | Marcia Held | 8 | Daughter | — | Indiana |
| 25 | Roy Steffey | 48 | Head | Recreation Leader | Indiana |
| 26 | Goldie Steffey | 49 | Wife | — | Indiana |
| 27 | Emil L. Steffey | 17 | Son | — | Indiana |
| 28 | Marion R. Steffey | 15 | Son | — | Indiana |
| 29 | Meredith M. Steffey | 15 | Daughter | — | Indiana |
| 30 | Russell L. Steffey | 14 | Son | — | Indiana |
| 31 | Roy J. Steffey | 12 | Son | — | Indiana |
| 32 | Max E. Steffey | 6 | Son | — | Indiana |
| 33 | Albert G. Mauer | 29 | Head | Salesman | Indiana |
| 34 | Rachael Mauer | 27 | Wife | — | Indiana |
| 35 | John E. Harper | 64 | Head | Accountant | Indiana |
| 36 | Ruth R. Harper | 47 | Wife | — | Indiana |
| 37 | Thomas G. Harper | 25 | Son | Account | Indiana |
| 38 | Mary Ann Harper THIS PERSON | 22 | Daughter | — | Indiana |
| 39 | Martha J. Harper | 15 | Daughter | — | Indiana |
| 40 | Gene Cole | 47 | Head | Stock Buyer | Indiana |
Pedigree Summary
Mary + 2 siblings
Gen 1 · 5 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)