JG
John Gustafson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Lake-County, Illinois
Our Model Tree links this John Gustafson across the 1920, 1930 and 1940 US Censuses in Lake-County, Illinois (XGBoost, ~Confirmed), with identified parents Charles & Charles — first a head (b.~1907), then head of a 3-person household.
Age 33
b. ~1907
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Lake-County, Illinois |
| Surname | Gustafson |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Benton Township |
| 1935 Residence (County) | Lake |
| Additional Details | |
| Occupation | Watchman |
| Industry | Manufacturing |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1400 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Watchman |
| Township / Ward | Benton Township |
| Est. Birth Year | ~1907 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| John Gustafson | Head | — | 33 | ~1907 |
| Dorothy Gustafson | Daughter | — | 3 | ~1937 |
| Dorothy Gustafson | Spouse | — | 33 | ~1907 |
Census Appearances
1920
Lake, Illinois
Son, age 14
Lake, Illinois · implied b. ~1906 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Gustafson |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Lake, Illinois
Son, age 23
Lake, Illinois · implied b. ~1907 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Gustafson |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Finisher |
| Industry | Cement |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Lake-County, Illinois
Head, age 33
Lake-County, Illinois · implied b. ~1907 — 3 household members
| Surname | Gustafson |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Benton Township |
| 1935 Residence (County) | Lake |
| Occupation | Watchman |
| Industry | Manufacturing |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1400 |
| Highest Grade | H 4 |
| 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 Gustafson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charles Gustafson (~0.92 confidence) and father Charles Gustafson (~0.92 confidence) and mother Hilda Gustafson (~0.92 confidence) and mother Hilda Gustafson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Gustafson
b. ~1872
Source father
● Household
· direct · ~0.92
Father
Charles Gustafson
b. ~1873
Source father
● Household
· direct · ~0.92
Mother
Hilda Gustafson
b. ~1879
Source mother
● Household
· direct · ~0.92
Mother
Hilda Gustafson
b. ~1874
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Gustafson
Head · 1940 · age 33 · b. ~1907 · 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 — Lake-County, Illinois
Open full size
1940 US Federal Census — Lake-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00828-00214)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Rosman Richardson | 8 | Daughter | — | Illinois |
| 2 | Raymond Richardson | 4 | Son | — | Illinois |
| 3 | William Wadkins | 62 | Head | Paver | Wisconsin |
| 4 | Neal Benkendorf | 57 | Head | Carpenter | Illinois |
| 5 | Rose Benkendorf | 55 | Wife | — | Switzerland |
| 6 | Julius Benkendorf | 29 | Daughter | Bookkeeper | Illinois |
| 7 | Marie Benkendorf | 22 | Daughter | Laborer | Illinois |
| 8 | John Benkendorf | 20 | Son | Laborer | Illinois |
| 9 | Evelyn Benkendorf | 16 | Daughter | New Worker | Illinois |
| 10 | Ruth Benkendorf | 13 | Daughter | — | Illinois |
| 11 | David Benkendorf | 12 | Son | — | Illinois |
| 12 | William Holcomb | 34 | Head | Service Man | Indiana |
| 13 | Irene Holcomb | 29 | Wife | — | Michigan |
| 14 | Terry Holcomb | 2 | Son | — | Illinois |
| 15 | Carollyn Holcomb | 0 | Daughter | — | Illinois |
| 16 | Edward Hanne | 33 | Head | Upholstering | Kansas |
| 17 | Edna Hanne | 29 | Wife | — | Illinois |
| 18 | Stephen Hanne | 5 | Son | — | Illinois |
| 19 | Barbara Hanne | 3 | Daughter | — | Illinois |
| 20 | John R Valentine | 44 | Head | District Manager | Nebraska |
| 21 | Lillian Valentine | 36 | Wife | — | Illinois |
| 22 | Lillian Valentine | 79 | Mother | — | Texas |
| 23 | Lillian Hamilton | 68 | Head | — | Indiana |
| 24 | Audrey Hamilton | 37 | Daughter | — | Illinois |
| 25 | Carl Roscoe Crissey | 63 | Head | Laborer | Michigan |
| 26 | John Sulak | 50 | Head | Janitor | Czecho-Slovakia |
| 27 | Rose Sulak | 45 | Wife | — | Germany |
| 28 | Anthony Poulos | 40 | Head | Engineer | Greece |
| 29 | Mary Poulos | 41 | Wife | — | Poland |
| 30 | Harry Poulos | 21 | Son | Attendant | Illinois |
| 31 | Elizabeth Poulos | 18 | Daughter | — | Illinois |
| 32 | Stanley Poulos | 16 | Son | — | Illinois |
| 33 | Peter Poulos | 15 | Son | — | Illinois |
| 34 | Evelyn Poulos | 14 | Daughter | — | Illinois |
| 35 | Vasilus Poulos | 85 | Father | — | Greece |
| 36 | John Gustafson THIS PERSON | 33 | Head | Watchman | Illinois |
| 37 | Dorothy Gustafson | 33 | Wife | — | Illinois |
| 38 | Dorothy Gustafson | 3 | Daughter | — | Illinois |
| 39 | George Charlton | 47 | Head | Weaver | England |
| 40 | Lydia Charlton | 49 | Wife | — | England |
Pedigree Summary
John
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)