MS
Mary Swanson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Wapello-County, Iowa
Our Model Tree links this Mary Swanson across the 1930 and 1940 US Censuses in Wapello-County, Iowa (XGBoost, ~Confirmed) — first a daughter (b.~1930), then head of a 8-person household.
Age 10
b. ~1930
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Wapello-County, Iowa |
| Surname | Swanson |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Ottumwa City |
| 1935 Residence (County) | Wapello County |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Ottumwa City |
| Est. Birth Year | ~1930 |
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 |
|---|---|---|---|---|
| George Swanson | Son | — | 12 | ~1928 |
| Lorraine Swanson | Daughter | — | 18 | ~1922 |
| Mary Swanson | Other | — | 78 | ~1862 |
| Mary Swanson | Daughter | — | 10 | ~1930 |
| George Swanson | Head | — | 42 | ~1898 |
| Esther Swanson | Spouse | — | 42 | ~1898 |
| Russell Swanson | Son | — | 15 | ~1925 |
| John Swanson | Son | — | 6 | ~1934 |
Census Appearances
1930
Wapello, Iowa
Daughter, age
Wapello, Iowa · implied b. ~1930 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Swanson |
| Given Name | Marie E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Veteran | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Wapello-County, Iowa
Daughter, age 10
Wapello-County, Iowa · implied b. ~1930 — 8 household members
| Surname | Swanson |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Ottumwa City |
| 1935 Residence (County) | Wapello County |
| Highest Grade | No 8 |
| 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 Swanson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Swanson
Daughter · 1940 · age 10 · b. ~1930 · Iowa
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Sibling
Russell Swanson
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Swanson
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lorraine Swanson
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Swanson
Sibling · 1940 · age 6
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 — Wapello-County, Iowa
Open full size
1940 US Federal Census — Wapello-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01209-00287)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary S. Mcnett | 55 | Head | Private Instructor | Iowa |
| 42 | Teresa A. Nye | 44 | Lodger | Teacher | Illinois |
| 43 | Elizabeth A. Davis | 49 | Lodger | Teacher | Illinois |
| 44 | Katherine M. Gohman | 45 | Lodger | Stenographer | Indiana |
| 45 | C. Donald Reedquist | 25 | Head | Office Worker | Iowa |
| 46 | Virginia G. Reedquist | 23 | Wife | — | Wisconsin |
| 47 | Harold L. Petri | 36 | Head | Painter | Illinois |
| 48 | Helen L. Petri | 35 | Wife | — | Iowa |
| 49 | Verene E. Petri | 14 | Daughter | — | Iowa |
| 50 | Mary E. Petri | 12 | Daughter | — | Iowa |
| 51 | Harry A. Petri | 9 | Son | — | Iowa |
| 52 | Richard A. Petri | 8 | Son | — | Iowa |
| 53 | Milo Ann Petri | 6 | Daughter | — | Iowa |
| 54 | Joyce A. Petri | 4 | Daughter | — | Iowa |
| 55 | Howard B. Snyder | 41 | Head | Stationary Engineer | Iowa |
| 56 | Lola C. Snyder | 38 | Wife | Houseworker | Iowa |
| 57 | N. Louise Snyder | 14 | Daughter | — | Iowa |
| 58 | Dwight E. Snyder | 13 | Son | — | Iowa |
| 59 | Alfred G. Anderson | 69 | Head | Moulder | Sweden |
| 60 | Elaine T. Anderson | 29 | Daughter | Switch Board Operator | Iowa |
| 61 | C. Victor Pohlson | 61 | Head | Cigar Maker | Iowa |
| 62 | Catherine A. Pohlson | 62 | Wife | — | Iowa |
| 63 | Carl J. Pohlson | 36 | Son | Trimmer Meat | Iowa |
| 64 | Mary J. Pohlson | 27 | Daughter | — | Iowa |
| 65 | Maxine H. Pohlson | 25 | Daughter | Canner | Iowa |
| 66 | F. William Pohlson | 21 | Son | Machine Operator | Iowa |
| 67 | Anna A. Williamson | 74 | Head | — | Sweden |
| 68 | Alice W. Williamson | 44 | Daughter | Bookkeeper | Iowa |
| 69 | George F. Swanson | 42 | Head | Machinist | Iowa |
| 70 | Esther M. Swanson | 42 | Wife | — | Iowa |
| 71 | Lorraine E. Swanson | 18 | Daughter | — | Iowa |
| 72 | Russell E. Swanson | 15 | Son | — | Iowa |
| 73 | George Jr. Swanson | 12 | Son | — | Iowa |
| 74 | Mary E. Swanson THIS PERSON | 10 | Daughter | — | Iowa |
| 75 | John K. Swanson | 6 | Son | — | Iowa |
| 76 | Mary B. Swanson | 78 | Mother | — | Sweden |
| 77 | John C. Muchow | 39 | Head | Labor | Iowa |
| 78 | Margaret M. Muchow | 33 | Wife | — | Iowa |
| 79 | Jean M. Muchow | 9 | Daughter | — | Iowa |
| 80 | Marjorie A. Muchow | 7 | Daughter | — | 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)