EP
Elmer Peterson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Knox-County, Illinois
Our Model Tree links this Elmer Peterson across the 1920, 1930 and 1940 US Censuses in Knox-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1888), then head of a 3-person household.
Age 52
b. ~1888
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Knox-County, Illinois |
| Surname | Peterson |
| Given Name | Elmer |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Henderson Twp |
| 1935 Residence (County) | Knox |
| Additional Details | |
| Occupation | Farming |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 70 |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Farming |
| Township / Ward | Henderson Twp |
| Est. Birth Year | ~1888 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Elmer | Age | Birth yr |
|---|---|---|---|---|
| Denise Peterson | Daughter | — | 11 | ~1929 |
| Mildred Peterson | Spouse | — | 48 | ~1892 |
| Elmer Peterson | Head | — | 52 | ~1888 |
Census Appearances
1920
Knox, Illinois
Head, age 32
Knox, Illinois · implied b. ~1888 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Elmer |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Farm |
| Industry | Gen farm |
| Class of Worker | Em |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Knox, Illinois
Head, age 42
Knox, Illinois · implied b. ~1888 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Elmer |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 24 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Knox-County, Illinois
Head, age 52
Knox-County, Illinois · implied b. ~1888 — 3 household members
| Surname | Peterson |
| Given Name | Elmer |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Henderson Twp |
| 1935 Residence (County) | Knox |
| Occupation | Farming |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 70 |
| Highest Grade | 7 |
| 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 Elmer Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Elmer Peterson
Head · 1940 · age 52 · b. ~1888 · Illinois
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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 — Knox-County, Illinois
Open full size
1940 US Federal Census — Knox-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00827-00036)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ed Patterson | 56 | Head | Farming | Illinois |
| 2 | Maude Patterson | 50 | Wife | — | Illinois |
| 3 | Russell Patterson | 17 | Son | — | Illinois |
| 4 | Victor Holmsted | 67 | Head | Pastor | Sweden |
| 5 | Sophia Holmsted | 67 | Wife | — | Illinois |
| 6 | August Peterson | 78 | Brother-in-law | — | Sweden |
| 7 | C. V. Helberg | 65 | Head | Farming | Sweden |
| 8 | Almenda Helberg | 69 | Wife | — | Illinois |
| 9 | Amanda Yohnson | 64 | Head | — | Illinois |
| 10 | Wallace Yohnson | 41 | Son | Farming | Illinois |
| 11 | Glendya Yohnson | 32 | Daughter | Stenographer | Illinois |
| 12 | Frank H. Peterson | 41 | Head | Farming | Illinois |
| 13 | Elvena Powrie | 53 | Housekeeper | — | Illinois |
| 14 | William Heagy | 67 | Head | Farming | Illinois |
| 15 | Minnie Heagy | 64 | Wife | — | Illinois |
| 16 | Emily Plank | 63 | Sister-in-law | — | Illinois |
| 17 | Hanna Rising | 61 | Head | — | Sweden |
| 18 | Stanley Rising | 33 | Son | Farming | Illinois |
| 19 | Ruby Rising | 29 | Daughter | — | Illinois |
| 20 | Cora Moberg | 56 | Head | — | Illinois |
| 21 | Henry B. Smith | 71 | Head | Farming | Illinois |
| 22 | Ida Smith | 65 | Wife | — | Sweden |
| 23 | Ludwig Peterson | 77 | Head | — | Sweden |
| 24 | Ernest Peterson | 28 | Son | Farming | Illinois |
| 25 | Elmer Peterson THIS PERSON | 52 | Head | Farming | Illinois |
| 26 | Mildred Peterson | 48 | Wife | — | Illinois |
| 27 | Denise Peterson | 11 | Daughter | — | Illinois |
| 28 | Fred W. Peterson | 38 | Head | Common Laborer | Illinois |
| 29 | Flayda Peterson | 37 | Wife | Farming | Illinois |
| 30 | Marion J. Peterson | 15 | Daughter | — | Canada |
| 31 | Carl W. Benson | 42 | Head | Farming | Illinois |
| 32 | Laura Benson | 36 | Wife | — | Illinois |
| 33 | Frances Ann Benson | 8 | Daughter | — | Illinois |
| 34 | Bessie Wilson | 59 | Head | Farming | England |
| 35 | Edward C. Wilson | 70 | Husband | — | Illinois |
| 36 | Mary E. Peterson | 61 | Head | — | Illinois |
| 37 | James R. Jr. Wilson | 23 | Partner | Farming | Illinois |
| 38 | Pauline Wilson | 21 | Wife | — | Illinois |
| 39 | Rodney Wilson | 2 | Son | — | Illinois |
| 40 | Hanna Peterson | 73 | Boarder | — | Sweden |
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)