MD
Mary Dunlap — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Grundy-County, Missouri
Our Model Tree links this Mary Dunlap across the 1930 and 1940 US Censuses in Grundy-County, Missouri (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 7-person household.
Age 12
b. ~1928
Female
Daughter
Born: Missouri
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Grundy-County, Missouri |
| Surname | Dunlap |
| Given Name | Mary Lou |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | Liberty Township |
| 1935 Residence (County) | Grundy |
| Additional Details | |
| Class of Worker | No |
| Income (1939) | 0 |
| Highest Grade | No 2 |
| 1935 Residence | Same place |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Township / Ward | Liberty Township |
| Est. Birth Year | ~1928 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Ruth Dunlap | Spouse | — | 44 | ~1896 |
| Wilma Dunlap | Daughter | — | 18 | ~1922 |
| Georgia Dunlap | Daughter | — | 20 | ~1920 |
| Mary Dunlap | Daughter | — | 12 | ~1928 |
| Marina Dunlap | Son | — | 12 | ~1928 |
| W Dunlap | Head | — | 61 | ~1879 |
| John Dunlap | Son | — | 13 | ~1927 |
Census Appearances
1930
Grundy, Missouri
Daughter, age 2
Grundy, Missouri · implied b. ~1928 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dunlap |
| Given Name | Mary Lou |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Missouri |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
Grundy-County, Missouri
Daughter, age 12
Grundy-County, Missouri · implied b. ~1928 — 7 household members
| Surname | Dunlap |
| Given Name | Mary Lou |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | Liberty Township |
| 1935 Residence (County) | Grundy |
| Class of Worker | No |
| Income (1939) | 0 |
| Highest Grade | No 2 |
| 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 Dunlap across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Dunlap
Daughter · 1940 · age 12 · b. ~1928 · Missouri
★ You are viewing this record
Sibling
Georgia Dunlap
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marina Dunlap
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Dunlap
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Wilma Dunlap
Sibling · 1940 · age 18
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 — Grundy-County, Missouri
Open full size
1940 US Federal Census — Grundy-County, Missouri
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02110-00111)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Wayne Samples | 32 | Son | Laborer | Missouri |
| 42 | Ruth Samples | 25 | Daughter-in-law | — | Washington |
| 43 | Benny Samples | 5 | Grandson | — | — |
| 44 | Raymond Vencill | 38 | Head | Farm Farmer | Missouri |
| 45 | Corrine Vencill | 35 | Wife | — | Missouri |
| 46 | John Jr. Vencill | 15 | Son | — | Missouri |
| 47 | Earl Vencill | 12 | Son | — | Missouri |
| 48 | Barbara Vencill | 10 | Daughter | — | Missouri |
| 49 | Martha Vencill | 5 | Daughter | — | — |
| 50 | Charles Shira | 39 | Head | Farmer | Missouri |
| 51 | Mintie Shira | 36 | Wife | — | Missouri |
| 52 | Charles O. Shira | 8 | Son | — | Missouri |
| 53 | Wm. Wilford | 59 | Head | Farmer | Missouri |
| 54 | Vernie E. Wilford | 56 | Wife | — | Missouri |
| 55 | Lloyd Sexton | 25 | Head | Farmer | Iowa |
| 56 | Doris Sexton | 21 | Wife | — | Iowa |
| 57 | Ernest Lee Sexton | 1 | Son | — | — |
| 58 | Harold Sexton | 19 | Brother | Farm Laborer | Iowa |
| 59 | Sam A. Jr. Todd | 63 | Head | Farmer | Missouri |
| 60 | Verna M. Todd | 60 | Wife | — | Missouri |
| 61 | Robert J. Todd | 70 | Brother | — | Missouri |
| 62 | Wm. Vencill | 58 | Head | Farmer | Missouri |
| 63 | Ella G. Vencill | 60 | Wife | — | Missouri |
| 64 | Gay Wilson | 40 | Head | Farm Laborer | Missouri |
| 65 | Roderic Wilson | 34 | Wife | Teacher | Missouri |
| 66 | Martha Jane Wilson | 9 | Daughter | — | Missouri |
| 67 | Fred Wheeler | 52 | Head | Farm Operator | Missouri |
| 68 | Hill Florence Wheeler | 54 | Sister | — | Missouri |
| 69 | W. L. Dunlap | 61 | Head | Farmer | Pennsylvania |
| 70 | Ruth Dunlap | 44 | Wife | — | Missouri |
| 71 | Georgia Dunlap | 20 | Daughter | — | Missouri |
| 72 | Wilma Dunlap | 18 | Daughter | — | Missouri |
| 73 | John Calvin Dunlap | 13 | Son | — | Missouri |
| 74 | Mary Lou Dunlap THIS PERSON | 12 | Daughter | — | Missouri |
| 75 | Marina Lee Dunlap | 12 | Son | — | Missouri |
| 76 | Ora Robertson | 56 | Head | — | Missouri |
| 77 | Glendola Robertson | 22 | Daughter | — | Missouri |
| 78 | Robert Robertson | 19 | Son | Farm Labor | Missouri |
| 79 | Shirlen Robertson | 17 | Daughter | — | Missouri |
| 80 | Mack Robertson | 35 | Brother-in-law | — | Missouri |
Related Census Records
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)