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Anna Olsen — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Shelby-County, Iowa
Our Model Tree links this Anna Olsen across the 1920, 1930 and 1940 US Censuses in Shelby-County, Iowa (XGBoost, ~Confirmed) — first a spouse (b.~1895), then head of a 6-person household.
Age 45
b. ~1895
Female
Spouse
Born: Denmark
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Shelby-County, Iowa |
| Surname | Olsen |
| Given Name | Anna |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Denmark |
| 1935 Residence (City) | Lincoln Twp |
| 1935 Residence (County) | Shelby |
| Naturalization Status | Alien |
| Additional Details | |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth Country | Denmark |
| Birthplace (normalized) | denmark |
| Township / Ward | Lincoln Twp |
| Est. Birth Year | ~1895 |
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 |
|---|---|---|---|---|
| Betty Olsen | Daughter | — | 14 | ~1926 |
| Helmer Olsen | Son | — | 21 | ~1919 |
| Darlene Olsen | Daughter | — | 12 | ~1928 |
| Nels Olsen | Head | — | 52 | ~1888 |
| Anna Olsen | Spouse | — | 45 | ~1895 |
| Emma Olsen | Daughter | — | 7 | ~1933 |
Census Appearances
Spouse, age 24
Shelby, Iowa · implied b. ~1896 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olson |
| Given Name | Anna |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Denmark |
| Year of Immigration | 1911 |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | LC |
| Birth Country | Denmark |
| Birthplace (normalized) | denmark |
1930
Shelby, Iowa
Other, age 35
Shelby, Iowa · implied b. ~1895 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olsen |
| Given Name | Anna M |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Denmark |
| Naturalization Status | Alien |
| Year of Immigration | 1911 |
| Age at First Marriage | 18 |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Can Read/Write | Yes |
| Mother Tongue | Danish |
| Birth Country | Denmark |
| Birthplace (normalized) | denmark |
1940
Shelby-County, Iowa
Spouse, age 45
Shelby-County, Iowa · implied b. ~1895 — 6 household members
| Surname | Olsen |
| Given Name | Anna |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Denmark |
| 1935 Residence (City) | Lincoln Twp |
| 1935 Residence (County) | Shelby |
| Naturalization Status | Alien |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth Country | Denmark |
| Birthplace (normalized) | denmark |
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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Anna Olsen
Spouse · 1940 · age 45 · b. ~1895 · 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 — Shelby-County, Iowa
Open full size
1940 US Federal Census — Shelby-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01204-00336)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Donald Conrad | 15 | Son | — | Iowa |
| 2 | Geraldine Conrad | 13 | Daughter | — | Iowa |
| 3 | Charles Conrad | 9 | Son | — | Iowa |
| 4 | Max Conrad | 4 | Son | — | Iowa |
| 5 | Bonnie Conrad | 2 | Daughter | — | Iowa |
| 6 | Helga Andersen | 52 | Head | Farmer | Denmark |
| 7 | Anna Andersen | 52 | Wife | — | Denmark |
| 8 | Harry Andersen | 19 | Son | Laborer | Denmark |
| 9 | Donald Andersen | 10 | Son | — | Iowa |
| 10 | Carl Erickson | 51 | Head | Farmer | Iowa |
| 11 | Georgia Erickson | 42 | Wife | — | Iowa |
| 12 | Wm Pauley | 54 | Head | Laborer | Iowa |
| 13 | Rosie Pauley | 49 | Wife | — | Iowa |
| 14 | John Frahm | 55 | Head | Laborer | Germany |
| 15 | Dora Frahm | 44 | Wife | — | Iowa |
| 16 | Leonard Frahm | 22 | Son | Laborer | Iowa |
| 17 | Virginia Frahm | 13 | Daughter | — | Iowa |
| 18 | Alvin Frahm | 12 | Son | — | Iowa |
| 19 | Chris M Christensen | 63 | Head | Farmer | Denmark |
| 20 | Lena Christensen | 58 | Wife | — | Denmark |
| 21 | Andrew Mejerus | 53 | Head | Laborer | Germany |
| 22 | Rose Mejerus | 48 | Wife | — | Iowa |
| 23 | Dorothy Mejerus | 21 | Daughter | — | Iowa |
| 24 | Delbert Mejerus | 18 | Son | Laborer | Iowa |
| 25 | Helen Mejerus | 15 | Daughter | — | Iowa |
| 26 | Leroy Mejerus | 13 | Son | — | Iowa |
| 27 | Leonard Mejerus | 10 | Son | — | Iowa |
| 28 | Rita Mejerus | 7 | Daughter | — | Iowa |
| 29 | Edward Mejerus | 6 | Son | — | Iowa |
| 30 | Alice Mejerus | 3 | Daughter | — | Iowa |
| 31 | Genevieve Mejerus | 0 | Daughter | — | Iowa |
| 32 | Carl Fothman | 36 | Head | Farmer | Germany |
| 33 | Katherine Fothman | 29 | Wife | — | Iowa |
| 34 | Nels Olsen | 52 | Head | Farmer | Denmark |
| 35 | Anna Olsen THIS PERSON | 45 | Wife | — | Denmark |
| 36 | Helmer Olsen | 21 | Son | Laborer | Iowa |
| 37 | Betty Olsen | 14 | Daughter | — | Iowa |
| 38 | Darlene Olsen | 12 | Daughter | — | Iowa |
| 39 | Emma Olsen | 7 | Daughter | — | Iowa |
| 40 | Larry Engel | 27 | Head | Farmer | Iowa |
Related Census Records
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)