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Mary Mcelroy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Fremont-County, Iowa
Our Model Tree links this Mary Mcelroy across the 1930 and 1940 US Censuses in Fremont-County, Iowa (XGBoost, ~Confirmed) — first a daughter (b.~1919), then head of a 8-person household.
Age 21
b. ~1919
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Fremont-County, Iowa |
| Surname | McElroy |
| Given Name | Mary A |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Benton Township |
| 1935 Residence (County) | Fremont |
| Additional Details | |
| Occupation | House Keeper |
| Industry | Own Home |
| Class of Worker | NP |
| Hours Worked | 0 |
| Income (1939) | 225 |
| Highest Grade | Hs 4 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Housekeeper |
| Township / Ward | Benton Township |
| Est. Birth Year | ~1919 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Mcelroy | Daughter | — | 21 | ~1919 |
| Perry Mcelroy | Son | — | 22 | ~1918 |
| Robert Mcelroy | Son | — | 14 | ~1926 |
| Clyde Mcelroy | Head | — | 60 | ~1880 |
| Wendell Mcelroy | Son | — | 12 | ~1928 |
| Carl Mcelroy | Son | — | 25 | ~1915 |
| Clyde Mcelroy | Son | — | 18 | ~1922 |
| Mary Mcelroy | Spouse | — | 54 | ~1886 |
Census Appearances
1930
Fremont, Iowa
Daughter, age 11
Fremont, Iowa · implied b. ~1919 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McElroy |
| Given Name | Mary A. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Fremont-County, Iowa
Daughter, age 21
Fremont-County, Iowa · implied b. ~1919 — 8 household members
| Surname | McElroy |
| Given Name | Mary A |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Benton Township |
| 1935 Residence (County) | Fremont |
| Occupation | House Keeper |
| Industry | Own Home |
| Class of Worker | NP |
| Hours Worked | 0 |
| Income (1939) | 225 |
| Highest Grade | Hs 4 |
| 1935 Residence | Iowa |
| 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 Mcelroy across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mcelroy
Daughter · 1940 · age 21 · b. ~1919 · Iowa
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Sibling
Robert Mcelroy
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Wendell Mcelroy
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Perry Mcelroy
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Carl Mcelroy
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clyde Mcelroy
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 — Fremont-County, Iowa
Open full size
1940 US Federal Census — Fremont-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01162-00011)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Cleon D Freeze | 16 | Son | — | Nebraska |
| 42 | Frederick D Keiper | 30 | Head | Farm Laborer | Iowa |
| 43 | Opal A Keiper | 32 | Wife | House Keeper | Oklahoma |
| 44 | Wallace Utterman | 65 | Head | Farm Laborer | Iowa |
| 45 | Margaret M Utterman | 63 | Wife | Home Maker | Iowa |
| 46 | Howard W Utterman | 21 | Son | Farm Laborer | Iowa |
| 47 | Burt R Wadhams | 48 | Head | Farmer | Iowa |
| 48 | Elba D Wadhams | 43 | Wife | House Keeper | Nebraska |
| 49 | Joan R Wadhams | 10 | Daughter | — | Nebraska |
| 50 | Anna F Wadhams | 67 | Mother-in-law | — | Germany |
| 51 | Richard D Cash | 40 | Head | Farmer Gardener | Missouri |
| 52 | Lela M Cash | 39 | Wife | House Keeper | Oklahoma |
| 53 | Richard L Cash | 14 | Son | — | South Dakota |
| 54 | Keith W Cash | 13 | Son | — | South Dakota |
| 55 | James H Cash | 12 | Son | — | South Dakota |
| 56 | Dorothey Cash | 9 | Daughter | — | Iowa |
| 57 | Clyde S Forney | 38 | Head | Farm Laborer | Iowa |
| 58 | Ruth J Forney | 28 | Wife | House Keeper | Iowa |
| 59 | Lanny J Forney | 2 | Son | — | Iowa |
| 60 | Clyde R Mcelroy | 60 | Head | Farmer | Iowa |
| 61 | Mary E Mcelroy | 54 | Wife | House Keeper | Iowa |
| 62 | Carl M Mcelroy | 25 | Son | Farm Laborer | Iowa |
| 63 | Perry L Mcelroy | 22 | Son | Farm Laborer | Iowa |
| 64 | Mary A Mcelroy THIS PERSON | 21 | Daughter | House Keeper | Iowa |
| 65 | Clyde R Mcelroy | 18 | Son | Farm Laborer | Iowa |
| 66 | Robert L Mcelroy | 14 | Son | — | Iowa |
| 67 | Wendell A Mcelroy | 12 | Son | — | Iowa |
| 68 | Clara D Handy | 56 | Head | House Keeper | Iowa |
| 69 | Albert E Handy | 35 | Head | Farmer | Iowa |
| 70 | Gertrude E Handy | 34 | Wife | House Keeper | Iowa |
| 71 | Robert W Handy | 8 | Son | — | Nebraska |
| 72 | Dean A Handy | 5 | Son | — | Nebraska |
| 73 | Albert L Handy | 4 | Son | — | Nebraska |
| 74 | Elmer C Burns | 26 | Head | Farm Hand | Nebraska |
| 75 | Bessie E Burns | 17 | Wife | House Keeper | Nebraska |
| 76 | Norma L Burns | 0 | Son | — | Nebraska |
| 77 | Edward Briley | 23 | Head | Farm Laborer | Iowa |
| 78 | Thelma M Briley | 21 | Wife | House Keeper | Iowa |
| 79 | Larry L Briley | 1 | Son | — | Iowa |
| 80 | George M Pauline | 62 | Father-in-law | Farm Laborer | Kansas |
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)