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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 Hulda & John — first a head (b.~1897), then head of a 3-person household.
Age 43
b. ~1897
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Nelson |
| Given Name | Harry A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Carpenter Contractor |
| Industry | Building Construction |
| Class of Worker | E |
| Hours Worked | 48 |
| Income (1939) | 900 |
| Highest Grade | H-4 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Carpenter Contractor |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1897 |
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 Harry | Age | Birth yr |
|---|---|---|---|---|
| Joan Nelson | Daughter | — | 13 | ~1927 |
| Harry Nelson | Head | — | 43 | ~1897 |
| Olga Nelson | Spouse | — | 41 | ~1899 |
Census Appearances
1920
Cook, Illinois
Son, age 21
Cook, Illinois · implied b. ~1899 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Harry |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Laborer |
| Industry | House |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 31
Cook, Illinois · implied b. ~1899 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Harry |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Carpenter |
| Industry | Building |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 43
Cook-County, Illinois · implied b. ~1897 — 3 household members
| Surname | Nelson |
| Given Name | Harry A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Carpenter Contractor |
| Industry | Building Construction |
| Class of Worker | E |
| Hours Worked | 48 |
| Income (1939) | 900 |
| Highest Grade | H-4 |
| 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: mother Hulda Nelson (~0.92 confidence) and father John Nelson (~0.92 confidence) and father John Nelson (~0.92 confidence) and mother Hattie Nelson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Hulda Nelson
b. ~1862
Source mother
● Household
· direct · ~0.92
Father
John Nelson
b. ~1863
Source father
● Household
· direct · ~0.92
Father
John Nelson
b. ~1865
Source father
● Household
· direct · ~0.92
Mother
Hattie Nelson
b. ~1869
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harry Nelson
Head · 1940 · age 43 · b. ~1897 · Illinois
★ You are viewing this record
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-t0627-00995-00723)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Jean Patterson | 35 | Wife | — | Louisiana |
| 2 | Margaret Brand | 61 | Head | — | Scotland |
| 3 | Gendena Brand | 21 | Daughter | Typist | Illinois |
| 4 | Ida Osterdahl | 73 | Head | — | Sweden |
| 5 | Walfrid Osterdahl | 36 | Head | Electrical Line Maintenance | Illinois |
| 6 | Kitty Osterdahl | 40 | Wife | — | Minnesota |
| 7 | Singla Jacobson | 79 | Head | — | Sweden |
| 8 | Floyd Byron | 39 | Head | Manager Employment | Indiana |
| 9 | Arline Byron | 41 | Wife | — | Illinois |
| 10 | Phoebe Byron | 15 | Daughter | — | Illinois |
| 11 | Angelo Buff | 25 | Head | Auto Mechanical | Pennsylvania |
| 12 | Minnie Buff | 28 | Wife | — | England |
| 13 | Barbara Buff | 2 | Daughter | — | Illinois |
| 14 | John Bond | 21 | Lodger | Laboratory Assistant | England |
| 15 | Walter W. Stoneman | 52 | Head | Switch-Tender | Michigan |
| 16 | Agnes Stoneman | 51 | Wife | — | Illinois |
| 17 | Elizabeth Stoneman | 11 | Daughter | — | Illinois |
| 18 | Elizabeth Mcbride | 59 | Aunt | Baker | Illinois |
| 19 | Amanda Smith | 71 | Head | — | Illinois |
| 20 | Beulah Smith | 41 | Daughter | Assistant Secretary | Illinois |
| 21 | Pauline Smith | 31 | Daughter | Waitress | Illinois |
| 22 | Bar Olson | 70 | Head | — | Sweden |
| 23 | Minnie Olson | 62 | Wife | — | Norway |
| 24 | Wesley Riley | 35 | Head | Chauffeur | Michigan |
| 25 | Leone Riley | 34 | Wife | — | Illinois |
| 26 | Nancy Riley | 4 | Daughter | — | Illinois |
| 27 | Martin Goodman | 42 | Head | Chauffeur | England |
| 28 | Irene Goodman | 36 | Wife | — | Illinois |
| 29 | Jane Goodman | 4 | Daughter | — | Illinois |
| 30 | Alice G. Taylor | 45 | Head | Salesperson | England |
| 31 | Phyllis A. Warren | 24 | Daughter | File Clerk | Canada-English |
| 32 | — | None | — | — | — |
| 33 | Daniel G. Siebert | 30 | Head | Sales Promoter | Illinois |
| 34 | Sonja M. Siebert | 26 | Wife | Salesperson | Texas |
| 35 | Harry A. Nelson THIS PERSON | 43 | Head | Carpenter Contractor | Illinois |
| 36 | Olga Nelson | 41 | Wife | — | Illinois |
| 37 | Joan Nelson | 13 | Daughter | — | Illinois |
| 38 | Harry Lucas | 39 | Head | Salesperson | Illinois |
| 39 | Martha Lucas | 27 | Wife | Salesperson | Illinois |
| 40 | — | None | — | — | — |
Pedigree Summary
Harry
Gen 1 · 4 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)