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Mary Grimes — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Marshall-County, Iowa
Our Model Tree links this Mary Grimes across the 1930 and 1940 US Censuses in Marshall-County, Iowa (XGBoost, ~Confirmed) — first a daughter (b.~1924), then head of a 4-person household.
Age 16
b. ~1924
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Marshall-County, Iowa |
| Surname | Grimes |
| Given Name | Mary Louise |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Albion town |
| 1935 Residence (County) | Marshall |
| Additional Details | |
| Highest Grade | H-2 |
| 1935 Residence | Same house |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Albion Town |
| Est. Birth Year | ~1924 |
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 |
|---|---|---|---|---|
| Harry Grimes | Head | — | 46 | ~1894 |
| Grace Grimes | Spouse | — | 45 | ~1895 |
| Mary Grimes | Daughter | — | 16 | ~1924 |
| Beverly Grimes | Daughter | — | 13 | ~1927 |
Census Appearances
1930
Marshall, Iowa
Daughter, age 3
Marshall, Iowa · implied b. ~1927 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Grimes |
| Given Name | Mary Louise |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Marshall-County, Iowa
Daughter, age 16
Marshall-County, Iowa · implied b. ~1924 — 4 household members
| Surname | Grimes |
| Given Name | Mary Louise |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Albion town |
| 1935 Residence (County) | Marshall |
| Highest Grade | H-2 |
| 1935 Residence | Same house |
| 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 Grimes across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Grimes
Daughter · 1940 · age 16 · b. ~1924 · Iowa
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Sibling
Beverly Grimes
Sibling · 1940 · age 13
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 — Marshall-County, Iowa
Open full size
1940 US Federal Census — Marshall-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01182-00103)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charles Brown | 36 | Head | Barber | Iowa |
| 2 | Marjorie Brown | 10 | Daughter | — | — |
| 3 | Patricia Brown | 2 | Daughter | — | — |
| 4 | Mary Hauser | 60 | Mother-in-law | — | Iowa |
| 5 | George Hauser | 27 | Brother-in-law | Common Laborer | Iowa |
| 6 | Clarence Keeler | 26 | Head | Manager | Iowa |
| 7 | Vera Keeler | 23 | Wife | — | Iowa |
| 8 | Gordon Keeler | 2 | Son | — | — |
| 9 | Jessie Reidel | 59 | Head | Farmer | Iowa |
| 10 | Alice N. Reidel | 45 | Sister | — | Iowa |
| 11 | David Wilson | 67 | Head | Farmer | Iowa |
| 12 | Maude A. Wilson | 60 | Wife | — | Indiana |
| 13 | Floyd Wilson | 41 | Son | Laborer | Iowa |
| 14 | Helen Wilson | 35 | Daughter | — | Iowa |
| 15 | Raymond Carlson | 10 | Grandson | — | Iowa |
| 16 | Jesse G. Waddell | 80 | Head | Farmer | New York |
| 17 | Lula O. Smith | 55 | Daughter | — | Illinois |
| 18 | Graham Smith | 56 | Son-in-law | Carpenter | Iowa |
| 19 | Pearlyer Schalle | 21 | Lodger | School Teacher | Iowa |
| 20 | Lois Kirkpatrick | 20 | Lodger | School Teacher | Iowa |
| 21 | Earnest L. Harmon | 43 | Head | Proprietor | Iowa |
| 22 | Goldie Harmon | 42 | Wife | — | Iowa |
| 23 | Alice Harmon | 14 | Daughter | — | Iowa |
| 24 | Wendell M. Harmon | 13 | Son | — | Iowa |
| 25 | Ellis Lee Harmon | 11 | Son | — | Iowa |
| 26 | Harry M. Grimes | 46 | Head | Manager | Illinois |
| 27 | Grace R. Grimes | 45 | Wife | — | Iowa |
| 28 | Mary Louise Grimes THIS PERSON | 16 | Daughter | — | Iowa |
| 29 | Beverly Jean Grimes | 13 | Daughter | — | Iowa |
| 30 | Robert Shewalter | 51 | Head | Carpenter | Nebraska |
| 31 | Helen Shewalter | 49 | Wife | General Housework | Iowa |
| 32 | Omar Shewalter | 26 | Son | Contractor | Iowa |
| 33 | Elvin Shewalter | 18 | Son | Carpenter Helper | Iowa |
| 34 | Bertha Shewalter | 17 | Daughter | Nya | Iowa |
| 35 | Dorothy Shewalter | 13 | Daughter | — | Iowa |
| 36 | Joan Shewalter | 6 | Daughter | — | Iowa |
| 37 | Willie Underwood | 59 | Head | Proprietor | Missouri |
| 38 | Blanche Underwood | 51 | Wife | — | Missouri |
| 39 | William D. Young | 79 | Head | — | Ohio |
| 40 | Lawrence A. Lounsberry | 62 | Head | — | Iowa |
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)