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John Olson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Webster-County, Iowa
Our Model Tree links this John Olson across the 1920, 1930 and 1940 US Censuses in Webster-County, Iowa (XGBoost, ~Confirmed), with identified parents Caroline — first a son (b.~1873), then head of a 5-person household.
Age 67
b. ~1873
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Webster-County, Iowa |
| Surname | Olson |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 67 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Lost Grove T |
| 1935 Residence (County) | Webster |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Lost Grove T |
| Est. Birth Year | ~1873 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Anita Olson | Daughter | — | 48 | ~1892 |
| Olive Olson | Daughter | — | 43 | ~1897 |
| Caroline Olson | Head | — | 82 | ~1858 |
| Gilbert Olson | Son | — | 53 | ~1887 |
| John Olson | Son | — | 67 | ~1873 |
Census Appearances
1920
Webster, Iowa
Other, age 48
Webster, Iowa · implied b. ~1872 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olson |
| Given Name | John W. |
| Relationship to Head | Brother-in-law |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Labor |
| Industry | Farm |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Webster, Iowa
Other, age 56
Webster, Iowa · implied b. ~1874 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olson |
| Given Name | John |
| Relationship to Head | Brother |
| Sex | M |
| Color / Race | White |
| Age | 56 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Webster-County, Iowa
Son, age 67
Webster-County, Iowa · implied b. ~1873 — 5 household members
| Surname | Olson |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 67 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Lost Grove T |
| 1935 Residence (County) | Webster |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 John Olson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Caroline Olson (~0.92 confidence). The pedigree spans 1 generation with 1 identified ancestor.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Caroline Olson
b. ~1858
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Olson
Son · 1940 · age 67 · b. ~1873 · Iowa
★ You are viewing this record
Sibling
Gilbert Olson
Sibling · 1940 · age 53
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anita Olson
Sibling · 1940 · age 48
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Olive Olson
Sibling · 1940 · age 43
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 — Webster-County, Iowa
Open full size
1940 US Federal Census — Webster-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01212-00391)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Freda Samuelson | 61 | Wife | — | Illinois |
| 2 | Gust B Erickson | 47 | Head | Farmer | Sweden |
| 3 | Hattie V Erickson | 45 | Wife | — | Sweden |
| 4 | Alvin Gorman | 42 | Head | Farm Laborer | Iowa |
| 5 | Elma Gorman | 42 | Wife | — | Iowa |
| 6 | Marie Gorman | 15 | Daughter | — | Iowa |
| 7 | Ruth Gorman | 13 | Daughter | — | Iowa |
| 8 | Richard Gorman | 10 | Son | — | Iowa |
| 9 | Francis Gorman | 7 | Son | — | Iowa |
| 10 | Caroline Olson | 82 | Head | — | Sweden |
| 11 | John Olson THIS PERSON | 67 | Son | — | Illinois |
| 12 | Gilbert Olson | 53 | Son | Farmer | Iowa |
| 13 | Anita Olson | 48 | Daughter | — | Iowa |
| 14 | Olive Olson | 43 | Daughter | — | Iowa |
| 15 | Willard Peterson | 29 | Head | Farmer | Iowa |
| 16 | Hazel Peterson | 20 | Wife | — | Iowa |
| 17 | Caryl Peterson | 0 | Daughter | — | Iowa |
| 18 | Victor Larson | 63 | Head | Farmer | Iowa |
| 19 | Hulda Larson | 55 | Wife | — | Sweden |
| 20 | Richard Larson | 19 | Son | Farm Labour | Iowa |
| 21 | Rena Larson | 17 | Daughter | — | Iowa |
| 22 | Emanuel Peterson | 48 | Head | Farmer | Iowa |
| 23 | Adena Peterson | 52 | Wife | — | Iowa |
| 24 | Charlotte Peterson | 15 | Daughter | — | Iowa |
| 25 | Charles Peterson | 13 | Son | — | Iowa |
| 26 | Ernest Peterson | 52 | Brother | Farmer | Iowa |
| 27 | Herbert Pingrew | 48 | Head | Farmer | Iowa |
| 28 | Zula Pingrew | 42 | Wife | — | Iowa |
| 29 | Herbert Jr Pingrew | 7 | Son | — | Iowa |
| 30 | Charlie Pingrew | 6 | Son | — | Iowa |
| 31 | Ronald Pingrew | 4 | Son | — | Iowa |
| 32 | Teddy Dean Pingrew | 2 | Son | — | Iowa |
| 33 | Marvin Fortune | 20 | Hired man | Farm Labor | Iowa |
| 34 | Alfred Peterson | 51 | Head | Farmer | Iowa |
| 35 | Sigrid Peterson | 49 | Wife | — | Sweden |
| 36 | Weldon Peterson | 16 | Son | Farm Laborer | Iowa |
| 37 | Paul Peterson | 13 | Son | — | Iowa |
| 38 | Fern Peterson | 27 | Daughter | — | Iowa |
| 39 | Emil G Carlson | 58 | Head | Farmer | Sweden |
| 40 | Mabel Carlson | 52 | Wife | — | Iowa |
Pedigree Summary
John + 3 siblings
Gen 1 · 1 parents
~0.92
Max depth 4 (1900–1950 window)
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)