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Harry Nelson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Harry Nelson across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Peter & Peter — first a son (b.~1912), then head of a 7-person household.
Age 28
b. ~1912
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Nelson |
| Given Name | Harry |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Tractor Driver |
| Industry | Contractor |
| Class of Worker | W |
| Hours Worked | 40 |
| Income (1939) | 420 |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Tractor Driver |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1912 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Harry | Age | Birth yr |
|---|---|---|---|---|
| Peter Nelson | Head | — | 61 | ~1879 |
| William Nelson | Son | — | 24 | ~1916 |
| George Nelson | Son | — | 17 | ~1923 |
| Kenneth Nelson | Son | — | 22 | ~1918 |
| Harold Nelson | Son | — | 30 | ~1910 |
| Harry Nelson | Son | — | 28 | ~1912 |
| Jenny Nelson | Spouse | — | 58 | ~1882 |
Census Appearances
1920
Cook, Illinois
Son, age 8
Cook, Illinois · implied b. ~1912 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Harry |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 18
Cook, Illinois · implied b. ~1912 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Harry |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| 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
Cook-County, Illinois
Son, age 28
Cook-County, Illinois · implied b. ~1912 — 7 household members
| Surname | Nelson |
| Given Name | Harry |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Tractor Driver |
| Industry | Contractor |
| Class of Worker | W |
| Hours Worked | 40 |
| Income (1939) | 420 |
| 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 Harry Nelson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Peter Nelson (~0.92 confidence) and father Peter Nelson (~0.92 confidence) and mother Jennie Nelson (~0.92 confidence) and mother Jenny Nelson (~0.92 confidence) and father John Nelson (~0.92 confidence) and mother Maud Nelson (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Peter Nelson
b. ~1879
Source father
● Household
· direct · ~0.92
Father
Peter Nelson
b. ~1879
Source father
● Household
· direct · ~0.92
Mother
Jennie Nelson
b. ~1881
Source mother
● Household
· direct · ~0.92
Mother
Jenny Nelson
b. ~1882
Source mother
● Household
· direct · ~0.92
Father
John Nelson
b. ~1882
Source father
● Household
· direct · ~0.92
Mother
Maud Nelson
b. ~1885
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harry Nelson
Son · 1940 · age 28 · b. ~1912 · Illinois
★ You are viewing this record
Sibling
George Nelson
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harold Nelson
Sibling · 1940 · age 30
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kenneth Nelson
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Nelson
Sibling · 1940 · age 24
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 — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00987-00829)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Stanley Ciezeck | 55 | Head | Wood Finisher | Poland |
| 2 | Martha Ciezeck | 53 | Wife | Tailor | Poland |
| 3 | Cecelia Scafidi | 29 | Daughter | Cashier | Illinois |
| 4 | Andrew Scafidi | 12 | Child | — | Illinois |
| 5 | Henry Jakubowski | 56 | Head | Presser | Poland |
| 6 | Matilda Jakubowski | 45 | Wife | — | Poland |
| 7 | Estelle Jakubowski | 25 | Daughter | Correspondent | Illinois |
| 8 | John Miskiewicz | 56 | Lodger | Presser | Poland |
| 9 | Peter Nelson | 61 | Head | Teamster | Sweden |
| 10 | Jenny Nelson | 58 | Wife | — | Sweden |
| 11 | Harold Nelson | 30 | Son | Mechanic | Illinois |
| 12 | Harry Nelson THIS PERSON | 28 | Son | Tractor Driver | Illinois |
| 13 | William Nelson | 24 | Son | Office Clerk | Illinois |
| 14 | Kenneth Nelson | 22 | Son | Helper | Illinois |
| 15 | George Nelson | 17 | Son | — | Illinois |
| 16 | William Colling | 41 | Head | Paper Dresser | Illinois |
| 17 | Frances Colling | 42 | Wife | — | Illinois |
| 18 | William Jr. Colling | 17 | Son | — | Illinois |
| 19 | Delores Colling | 15 | Daughter | — | Illinois |
| 20 | Floyd Colling | 13 | Son | — | Illinois |
| 21 | Jose Pociask | 54 | Fav | House Keeper | Illinois |
| 22 | John Kraus | 49 | Head | Coremaker | Poland |
| 23 | Pauline Kraus | 47 | Wife | — | Poland |
| 24 | Louise Papera | 53 | Fav | — | Poland |
| 25 | Frank Papera | 29 | Uncle | Baker | Illinois |
| 26 | John Papera | 21 | Uncle | Helper | Illinois |
| 27 | Caroline Papera | 19 | Uncle | Packer | Illinois |
| 28 | Anna Papera | 16 | Uncle | — | Illinois |
| 29 | Charles Papera | 14 | Uncle | — | Illinois |
| 30 | Sherman Bowser | 49 | Head | Machine Operator | Ohio |
| 31 | Florence Bowser | 42 | Wife | — | Michigan |
| 32 | Virginia Bowser | 16 | Daughter | — | Illinois |
| 33 | Eugene Bowser | 12 | Son | — | Illinois |
| 34 | Virginia Olsen | 21 | Lodger | Weaver | Wisconsin |
| 35 | Helen Olsen | 19 | Lodger | Office Clerk | Wisconsin |
| 36 | Chester Elmquist | 27 | Lodger | Lathe Operator | Wisconsin |
| 37 | Roger Neff | 44 | Head | Crane Operator | Bulgaria |
| 38 | Florence Neff | 34 | Wife | — | Illinois |
| 39 | Harold Neff | 16 | Son | — | Illinois |
| 40 | Norman Neff | 15 | Son | — | Illinois |
Related Census Records
Pedigree Summary
Harry + 4 siblings
Gen 1 · 6 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)