MS
Mary Sears — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Harrison-County, Iowa
Our Model Tree links this Mary Sears across the 1930 and 1940 US Censuses in Harrison-County, Iowa (XGBoost, ~Confirmed) — first a daughter (b.~1923), then head of a 11-person household.
Age 17
b. ~1923
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Harrison-County, Iowa |
| Surname | Sears |
| Given Name | Mary Jane |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Harrison |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | La Grange Township |
| Est. Birth Year | ~1923 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Dalen Sears | Son | — | 20 | ~1920 |
| Arlan Sears | Son | — | 10 | ~1930 |
| Donald Sears | Son | — | 15 | ~1925 |
| Betty Sears | Daughter | — | 8 | ~1932 |
| Agnes Sears | Spouse | — | 37 | ~1903 |
| Robert Sears | Son | — | 6 | ~1934 |
| Mary Sears | Daughter | — | 17 | ~1923 |
| Leland Sears | Son | — | 3 | ~1937 |
| Betty Sears | Daughter | — | 5 | ~1935 |
| Bruce Sears | Head | — | 39 | ~1901 |
| Bonnie Sears | Daughter | — | 12 | ~1928 |
Census Appearances
1930
Harrison, Iowa
Daughter, age 7
Harrison, Iowa · implied b. ~1923 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sears |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Harrison-County, Iowa
Daughter, age 17
Harrison-County, Iowa · implied b. ~1923 — 11 household members
| Surname | Sears |
| Given Name | Mary Jane |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Harrison |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 Sears across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Sears
Daughter · 1940 · age 17 · b. ~1923 · Iowa
★ You are viewing this record
Sibling
Robert Sears
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bonnie Sears
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Sears
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dalen Sears
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Arlan Sears
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Sears
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leland Sears
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Sears
Sibling · 1940 · age 5
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 — Harrison-County, Iowa
Open full size
1940 US Federal Census — Harrison-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01166-00337)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Lola Hubbard | 26 | Wife | — | Iowa |
| 42 | Lowell Hubbard | 5 | Son | — | Iowa |
| 43 | Kay Hubbard | 3 | Son | — | Iowa |
| 44 | Franklin Hubbard | 1 | Daughter | — | Iowa |
| 45 | Clarence Teager | 25 | Head | Farm Helper | Iowa |
| 46 | Leta Teager | 22 | Wife | — | Iowa |
| 47 | Bruce Sears | 39 | Head | Farming | Iowa |
| 48 | Agnes Fern Sears | 37 | Wife | — | Iowa |
| 49 | Dalen J Sears | 20 | Son | Laborer | Iowa |
| 50 | Mary Jane Sears THIS PERSON | 17 | Daughter | — | Iowa |
| 51 | Donald Raymond Sears | 15 | Son | Farm Helper | Iowa |
| 52 | Bonnie Jean Sears | 12 | Daughter | — | Iowa |
| 53 | Arlan Lee Sears | 10 | Son | — | Iowa |
| 54 | Betty Marie Sears | 8 | Daughter | — | Iowa |
| 55 | Robert Dennis Sears | 6 | Son | — | Iowa |
| 56 | Betty Ann Sears | 5 | Daughter | — | Iowa |
| 57 | Leland Bruce Sears | 3 | Son | — | Iowa |
| 58 | Roy Plumyer | 41 | Head | Farming | Iowa |
| 59 | Nora Plumyer | 42 | Wife | — | Iowa |
| 60 | Frances Arlene Plumyer | 10 | Daughter | — | Iowa |
| 61 | Jacob Smith | 67 | Head | Farming | Iowa |
| 62 | Susan Smith | 67 | Wife | — | Iowa |
| 63 | Henry Fortunman | 56 | Head | Farming | Nebraska |
| 64 | Anna Fortunman | 56 | Wife | — | Iowa |
| 65 | Louis Fortunman | 25 | Son | Farming | Iowa |
| 66 | Glenna Fortunman | 16 | Daughter | — | Iowa |
| 67 | George Philip Sears | 61 | Head | Farming | Illinois |
| 68 | Martha Rachel Sears | 55 | Wife | — | Iowa |
| 69 | Herman L Sears | 35 | Son | Mechanist | Iowa |
| 70 | C. William Riley | 67 | Head | Farming | Germany |
| 71 | Minnie Riley | 57 | Wife | — | Germany |
| 72 | Dick Frederick Riley | 35 | Son | Farming | Iowa |
| 73 | Bert Riley | 33 | Son | Farming | Iowa |
| 74 | Leonard Riley | 28 | Son | Laborer | Iowa |
| 75 | Dorothy Riley | 25 | Daughter | — | Iowa |
| 76 | Willis Riley | 20 | Son | Laborer | Iowa |
| 77 | Phyllis Riley | 11 | Daughter | — | Iowa |
| 78 | Fern L Smith | 35 | Head | Farming | Oklahoma |
| 79 | Ann Smith | 35 | Wife | — | Missouri |
| 80 | Rozella Smith | 5 | Daughter | — | Nebraska |
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)