AO
Anna Olsen — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Monona-County, Iowa
Our Model Tree links this Anna Olsen across the 1930 and 1940 US Censuses in Monona-County, Iowa (XGBoost, ~Confirmed) — first a spouse (b.~1900), then head of a 6-person household.
Age 40
b. ~1900
Female
Spouse
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Monona-County, Iowa |
| Surname | Olsen |
| Given Name | Anna |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| Additional Details | |
| Occupation | housewife |
| Industry | farm |
| Class of Worker | NP |
| Hours Worked | 48 |
| Highest Grade | No 8 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Housewife |
| Est. Birth Year | ~1900 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Anna | Age | Birth yr |
|---|---|---|---|---|
| Marva Olsen | Daughter | — | 15 | ~1925 |
| Olin Olsen | Head | — | 40 | ~1900 |
| Anna Olsen | Spouse | — | 40 | ~1900 |
| Marilyn Olsen | Daughter | — | 7 | ~1933 |
| Vernon Olsen | Son | — | 17 | ~1923 |
| Russell Olsen | Son | — | 5 | ~1935 |
Census Appearances
1930
Monona, Iowa
Spouse, age 30
Monona, Iowa · implied b. ~1900 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olson |
| Given Name | Anna |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 20 |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Monona-County, Iowa
Spouse, age 40
Monona-County, Iowa · implied b. ~1900 — 6 household members
| Surname | Olsen |
| Given Name | Anna |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| Occupation | housewife |
| Industry | farm |
| Class of Worker | NP |
| Hours Worked | 48 |
| Highest Grade | No 8 |
| 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 Anna Olsen across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Anna Olsen
Spouse · 1940 · age 40 · b. ~1900 · 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 — Monona-County, Iowa
Open full size
1940 US Federal Census — Monona-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01184-00524)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Hilman O. Olson | 36 | Head | Farmer | Iowa |
| 42 | Viola Olson | 37 | Wife | Housewife | Iowa |
| 43 | Joyce Olson | 10 | daughter | Housewife | Iowa |
| 44 | Howard Hansen | 21 | Hired man | Farm Helper | Iowa |
| 45 | Ray O. Burson | 36 | Head | Farmer | Iowa |
| 46 | Gilma Burson | 28 | wife | Housewife | Iowa |
| 47 | Gayland Burson | 7 | son | — | Iowa |
| 48 | Arlene Burson | 6 | daughter | — | Iowa |
| 49 | Ervin O. Adams | 57 | Head | Farmer | Iowa |
| 50 | Ruby Brown | 54 | sister | Housekeeper | Iowa |
| 51 | Edwin Brown | 8 | nephew | — | Nebraska |
| 52 | Kenneth Twiford | 18 | helper | Helper | Iowa |
| 53 | Andy O. Ballantyne | 31 | Head | Fruit Farming | Iowa |
| 54 | Edras Ballantyne | 34 | wife | Housewife | Arkansas |
| 55 | Wanda Adams | 7 | stepchild | — | Iowa |
| 56 | Geraldine Adams | 3 | stepchild | — | Iowa |
| 57 | Kenneth O. Lund | 37 | Head | Farmer | Iowa |
| 58 | Clara Lund | 37 | wife | Housewife | Iowa |
| 59 | Betty Lund | 5 | daughter | — | Iowa |
| 60 | Ab Antons | 77 | Uncle | Lodger | Norway |
| 61 | Park W. Moorhead | 39 | head | Farmer | Iowa |
| 62 | Edna Pauline Moorhead | 40 | wife | Housewife | Iowa |
| 63 | Barbara Moorhead | 14 | daughter | Student | Iowa |
| 64 | Rose Mary Moorhead | 9 | daughter | Student | Iowa |
| 65 | John Moorhead | 3 | son | — | Iowa |
| 66 | Olin Olsen | 40 | head | Farming | Iowa |
| 67 | Anna Olsen THIS PERSON | 40 | wife | Housewife | Iowa |
| 68 | Vernon Olsen | 17 | son | Farm Helper | Iowa |
| 69 | Marva Olsen | 15 | daughter | Student | Iowa |
| 70 | Marilyn Olsen | 7 | daughter | Student | Iowa |
| 71 | Russell Olsen | 5 | son | — | Iowa |
| 72 | Leonard Hedum | 45 | head | Laborer | Iowa |
| 73 | Atha Hedum | 32 | wife | Housewife | Iowa |
| 74 | Gaylord Hedum | 17 | son | Student | Iowa |
| 75 | Marilyn Hedum | 4 | son | — | Iowa |
| 76 | Maynard Hedum | 2 | son | — | Iowa |
| 77 | Eldora Taylor | 12 | stepdaughter | — | Iowa |
| 78 | Frank Adams | 33 | head | Mechanic | Iowa |
| 79 | Hazel Adams | 31 | wife | Housewife | Iowa |
| 80 | Leroy Adams | 8 | son | Student | 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)