HP
Harry Peterson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Will-County, Illinois
Our Model Tree links this Harry Peterson across the 1920, 1930 and 1940 US Censuses in Will-County, Illinois (XGBoost, ~Confirmed), with identified parents George & Dora — first a son (b.~1901), then head of a 4-person household.
Age 39
b. ~1901
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Will-County, Illinois |
| Surname | Peterson |
| Given Name | Harry |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Wilmington city |
| 1935 Residence (County) | Will |
| Additional Details | |
| Occupation | Laborer |
| Industry | Pipe Line Co |
| Class of Worker | PW |
| Hours Worked | 26 |
| Income (1939) | 400 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Laborer |
| Township / Ward | Wilmington City |
| Est. Birth Year | ~1901 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Harry | Age | Birth yr |
|---|---|---|---|---|
| Harry Peterson | Son | — | 39 | ~1901 |
| Laura Peterson | Other | — | 32 | ~1908 |
| Chris Peterson | Son | — | 39 | ~1901 |
| George Peterson | Head | — | 82 | ~1858 |
Census Appearances
1920
Will, Illinois
Son, age 16
Will, Illinois · implied b. ~1904 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Harry |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Will, Illinois
Son, age 27
Will, Illinois · implied b. ~1903 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Harry |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Occupation | Salesman |
| Industry | Confectionery |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Will-County, Illinois
Son, age 39
Will-County, Illinois · implied b. ~1901 — 4 household members
| Surname | Peterson |
| Given Name | Harry |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Wilmington city |
| 1935 Residence (County) | Will |
| Occupation | Laborer |
| Industry | Pipe Line Co |
| Class of Worker | PW |
| Hours Worked | 26 |
| Income (1939) | 400 |
| Highest Grade | No 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 Harry Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father George Peterson (~0.92 confidence) and mother Dora Peterson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
George Peterson
b. ~1859
Source father
● Household
· direct · ~0.92
Mother
Dora Peterson
b. ~1860
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harry Peterson
Son · 1940 · age 39 · b. ~1901 · Illinois
★ You are viewing this record
Sibling
Chris Peterson
Sibling · 1940 · age 39
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 — Will-County, Illinois
Open full size
1940 US Federal Census — Will-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00909-00981)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Joseph Craterfield | 52 | Head | Caretaker | Illinois |
| 2 | Pearl Craterfield | 40 | Wife | — | Illinois |
| 3 | Mary Craterfield | 26 | Daughter | Housework | Illinois |
| 4 | Rose Craterfield | 20 | Daughter | 2Nd Beater | Illinois |
| 5 | Joseph Craterfield | 12 | Son | — | Illinois |
| 6 | Fred Woolwine | 31 | Head | Pit Man | Maryland |
| 7 | Geraldine Woolwine | 26 | Wife | — | Illinois |
| 8 | Margaret Woolwine | 8 | Daughter | — | Illinois |
| 9 | Colleen Woolwine | 6 | Daughter | — | Illinois |
| 10 | Gerald Woolwine | 0 | Son | — | Illinois |
| 11 | Robert Pfister | 27 | Head | Drag Line Operator | Illinois |
| 12 | Ruth Pfister | 23 | Wife | — | Illinois |
| 13 | Robert Pfister | 4 | Son | — | Illinois |
| 14 | Edward Ryan | 74 | Head | — | Illinois |
| 15 | Anna Ryan | 33 | Daughter | Dentist Assistant | Illinois |
| 16 | Geraldine Fitzgerald | 14 | Granddaughter | — | Illinois |
| 17 | John Whitehead | 68 | Head | — | England |
| 18 | Ann Whitehead | 68 | Wife | — | Illinois |
| 19 | Arthur Heck | 36 | Head | Bond Picker | Illinois |
| 20 | Alpha Heck | 30 | Wife | — | Illinois |
| 21 | Anna Heck | 11 | Daughter | — | Illinois |
| 22 | Ruth Heck | 9 | Daughter | — | Illinois |
| 23 | Arthur Heck | 5 | Son | — | Illinois |
| 24 | Marlene Heck | 3 | Daughter | — | Illinois |
| 25 | Dora Heck | 0 | Daughter | — | Illinois |
| 26 | Richard Clover | 29 | Head | Mechanic | Illinois |
| 27 | Rose Clover | 20 | Wife | — | Indiana |
| 28 | Richard Clover | 2 | Son | — | Illinois |
| 29 | Carolyn Clover | 0 | Daughter | — | Illinois |
| 30 | James Clover | 22 | Brother | Mechanic | Illinois |
| 31 | Joseph Lasswell | 33 | Head | Oiler | Missouri |
| 32 | Anna Lasswell | 32 | Wife | — | Missouri |
| 33 | Leanna Lasswell | 12 | Daughter | — | Missouri |
| 34 | George Peterson | 82 | Head | — | Denmark |
| 35 | Harry Peterson THIS PERSON | 39 | Son | Laborer | Illinois |
| 36 | Chris Peterson | 39 | Son | Lineman | Illinois |
| 37 | Laura Peterson | 32 | Daughter-in-law | Hospital Attendant | Illinois |
| 38 | Donald Lasswell | 35 | Head | Drag Line Operator | Missouri |
| 39 | Mildred Lasswell | 35 | Wife | — | Illinois |
| 40 | Leon Lasswell | 13 | Son | — | Texas |
Related Census Records
Pedigree Summary
Harry + 1 sibling
Gen 1 · 2 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)