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Mary Mcdowell — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Delaware-County, Iowa
Our Model Tree links this Mary Mcdowell across the 1930 and 1940 US Censuses in Delaware-County, Iowa (XGBoost, ~Confirmed) — first a spouse (b.~1890), then head of a 7-person household.
Age 50
b. ~1890
Female
Spouse
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Delaware-County, Iowa |
| Surname | McDowell |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Prairie Twp |
| 1935 Residence (County) | Delaware |
| Additional Details | |
| Occupation | Housekeeper |
| Industry | Farm |
| Class of Worker | NP |
| Hours Worked | 48 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Housekeeper |
| Township / Ward | Prairie Twp |
| Est. Birth Year | ~1890 |
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 |
|---|---|---|---|---|
| Arline Mcdowell | Daughter | — | 18 | ~1922 |
| Mary Mcdowell | Spouse | — | 50 | ~1890 |
| Verle Mcdowell | Son | — | 26 | ~1914 |
| Merle Mcdowell | Son | — | 26 | ~1914 |
| George Mcdowell | Head | — | 54 | ~1886 |
| Glenn Mcdowell | Son | — | 19 | ~1921 |
| Eva Mcdowell | Daughter | — | 22 | ~1918 |
Census Appearances
1930
Delaware, Iowa
Other, age 40
Delaware, Iowa · implied b. ~1890 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDowell |
| Given Name | Mary E. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 20 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Delaware-County, Iowa
Spouse, age 50
Delaware-County, Iowa · implied b. ~1890 — 7 household members
| Surname | McDowell |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Prairie Twp |
| 1935 Residence (County) | Delaware |
| Occupation | Housekeeper |
| Industry | Farm |
| Class of Worker | NP |
| Hours Worked | 48 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 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 Mcdowell across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Mcdowell
Spouse · 1940 · age 50 · b. ~1890 · Iowa
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Delaware-County, Iowa
Open full size
1940 US Federal Census — Delaware-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01155-00463)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Carol Robinson | 0 | Daughter | — | Iowa |
| 42 | Leo M. Chapman | 31 | Head | Farmer | Iowa |
| 43 | Viola Chapman | 27 | Wife | Housekeeper | Iowa |
| 44 | Mary Alice Chapman | 4 | Daughter | — | Iowa |
| 45 | John Chapman | 2 | Son | — | Iowa |
| 46 | James Chapman | 0 | Son | — | Iowa |
| 47 | Ray Guthrie | 35 | Head | Farmer | Iowa |
| 48 | Esther Guthrie | 34 | Wife | Housekeeper | Iowa |
| 49 | Edward Mcallen | 38 | Hired Hand | Farm Labor | Iowa |
| 50 | John Carradus | 52 | Head | Farmer | Iowa |
| 51 | Mae Carradus | 48 | Wife | Housekeeper | Iowa |
| 52 | Leroy Carradus | 18 | Son | — | Iowa |
| 53 | Elliott Carradus | 14 | Son | — | Iowa |
| 54 | Elmer Carradus | 48 | Head | Farmer | Iowa |
| 55 | Lavina Carradus | 47 | Wife | Housekeeper | Iowa |
| 56 | Robert Carradus | 14 | Son | — | Iowa |
| 57 | Emily Carradus | 12 | Daughter | — | Iowa |
| 58 | Dean Carradus | 10 | Son | — | Iowa |
| 59 | William Carradus | 55 | Head | Farmer | Iowa |
| 60 | Nellie Carradus | 55 | Wife | Housekeeper | Wisconsin |
| 61 | Francis Carradus | 17 | Son | — | Iowa |
| 62 | Raymond Hines | 28 | Head | Farmer | Iowa |
| 63 | Lyda Hines | 26 | Wife | Housekeeper | Iowa |
| 64 | Lyle Hines | 6 | Son | — | Iowa |
| 65 | Luella Hines | 4 | Daughter | — | Iowa |
| 66 | Larry Hines | 2 | Son | — | Iowa |
| 67 | Lowell Hines | 0 | Son | — | Iowa |
| 68 | Patrick Burns | 52 | Head | Farmer | Iowa |
| 69 | Mable Burns | 43 | Wife | Housekeeper | Iowa |
| 70 | Kenneth Burns | 17 | Son | — | Iowa |
| 71 | Gene Burns | 15 | Son | — | Iowa |
| 72 | Eleanor Burns | 13 | Daughter | — | Iowa |
| 73 | Patricia Burns | 8 | Daughter | — | Iowa |
| 74 | George Mcdowell | 54 | Head | Farmer | Iowa |
| 75 | Mary Mcdowell THIS PERSON | 50 | Wife | Housekeeper | Iowa |
| 76 | Merle Mcdowell | 26 | Son | Farmer | Iowa |
| 77 | Verle Mcdowell | 26 | Son | Farm Labor | Iowa |
| 78 | Eva Mcdowell | 22 | Daughter | Housekeeper | Iowa |
| 79 | Glenn Mcdowell | 19 | Son | Farm Labor | Iowa |
| 80 | Arline Mcdowell | 18 | Daughter | School Teacher | 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)