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John Olsen — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Henderson-County, Illinois
Our Model Tree links this John Olsen across the 1930 and 1940 US Censuses in Henderson-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1920), then head of a 10-person household.
Age 20
b. ~1920
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Henderson-County, Illinois |
| Surname | Olsen |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Bald Bluff Twp. |
| 1935 Residence (County) | Henderson |
| Additional Details | |
| Occupation | Farm laborer |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 57 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Farm Laborer |
| Township / Ward | Bald Bluff Twp |
| Est. Birth Year | ~1920 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Ed Olsen | Head | — | 65 | ~1875 |
| Martha Olsen | Daughter | — | 13 | ~1927 |
| Mary Olsen | Daughter | — | 9 | ~1931 |
| Ethel Olsen | Daughter | — | 22 | ~1918 |
| Frank Olsen | Son | — | 11 | ~1929 |
| Elizabeth Olsen | Spouse | — | 53 | ~1887 |
| Fred Olsen | Son | — | 23 | ~1917 |
| John Olsen | Son | — | 20 | ~1920 |
| Edith Olsen | Daughter | — | 16 | ~1924 |
| Bert Olsen | Son | — | 19 | ~1921 |
Census Appearances
1930
Henderson, Illinois
Son, age 10
Henderson, Illinois · implied b. ~1920 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olson |
| Given Name | John E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Henderson-County, Illinois
Son, age 20
Henderson-County, Illinois · implied b. ~1920 — 10 household members
| Surname | Olsen |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Bald Bluff Twp. |
| 1935 Residence (County) | Henderson |
| Occupation | Farm laborer |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 57 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| 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 Olsen across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Olsen
Son · 1940 · age 20 · b. ~1920 · Illinois
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Sibling
Fred Olsen
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frank Olsen
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edith Olsen
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bert Olsen
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ethel Olsen
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Martha Olsen
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Olsen
Sibling · 1940 · age 9
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 — Henderson-County, Illinois
Open full size
1940 US Federal Census — Henderson-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00811-00007)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary Pauline Fluba | 5 | Daughter | — | Illinois |
| 2 | Philip Mcevoy | 67 | Lodger | Farmer | Iowa |
| 3 | William Porter | 52 | Head | Farmer | Illinois |
| 4 | Velva Crosley | 43 | Housekeeper | Housekeeper | Kentucky |
| 5 | Harold Crosley | 18 | Lodger | Farm Laborer | Illinois |
| 6 | George Chandler | 34 | Head | Farmer | Illinois |
| 7 | Florence Chandler | 31 | Wife | — | Illinois |
| 8 | Melvin Chandler | 7 | Son | — | Illinois |
| 9 | Vera Enders | 42 | Head | Farm Laborer | Illinois |
| 10 | Ina Enders | 45 | Wife | — | Illinois |
| 11 | Florence Enders | 19 | Daughter | Housekeeper | Illinois |
| 12 | Alice Enders | 18 | Daughter | Housekeeper | Illinois |
| 13 | Francis Enders | 16 | Daughter | — | Illinois |
| 14 | Ruth Enders | 15 | Daughter | — | Illinois |
| 15 | Irvin Enders | 12 | Son | — | Illinois |
| 16 | Forest Enders | 10 | Son | — | Illinois |
| 17 | Lois Enders | 7 | Daughter | — | Illinois |
| 18 | Francis Kallman | 58 | Head | Farmer | Illinois |
| 19 | Paul Beall | 13 | Lodger | — | Illinois |
| 20 | Clifford Dale | 25 | Head | Farmer | Illinois |
| 21 | Abby Dale | 25 | Wife | — | Illinois |
| 22 | Charles Dale | 4 | Son | — | Illinois |
| 23 | Ed Olsen | 65 | Head | Farmer | Illinois |
| 24 | Elizabeth Olsen | 53 | Wife | — | Illinois |
| 25 | Fred Olsen | 23 | Son | Plumber | Illinois |
| 26 | Ethel Olsen | 22 | Daughter | Housekeeper | Illinois |
| 27 | John Olsen THIS PERSON | 20 | Son | Farm Laborer | Illinois |
| 28 | Bert Olsen | 19 | Son | Farm Laborer | Illinois |
| 29 | Edith Olsen | 16 | Daughter | — | Illinois |
| 30 | Martha Olsen | 13 | Daughter | — | Illinois |
| 31 | Frank Olsen | 11 | Son | — | Illinois |
| 32 | Mary Olsen | 9 | Daughter | — | Illinois |
| 33 | Wallace Irvin | 48 | Head | Farmer | Illinois |
| 34 | Odessa Irvin | 41 | Wife | — | Iowa |
| 35 | Thomas Irvin | 58 | Hired hand | Hired Hand | Kentucky |
| 36 | George Irvin | 31 | Lodger | — | Illinois |
| 37 | James R. Frick | 37 | Head | Farmer | Illinois |
| 38 | Elaine Frick | 25 | Wife | — | Illinois |
| 39 | John Frick | 5 | Son | — | Illinois |
| 40 | Ira Lee Frick | 1 | Son | — | Illinois |
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)