JD
John Day — 1940 US Census Record
Model Tree available1940 United States Federal Census · Mahoning-County, Ohio
Our Model Tree links this John Day across the 1920, 1930 and 1940 US Censuses in Mahoning-County, Ohio (XGBoost, ~Confirmed), with identified parents John & John — first a head (b.~1911), then head of a 4-person household.
Age 29
b. ~1911
Male
Head
Born: New York
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Mahoning-County, Ohio |
| Surname | Day |
| Given Name | John W |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | Petersburg Village |
| 1935 Residence (County) | Mahoning |
| Additional Details | |
| Occupation | Machinist |
| Industry | Steel Mill |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 1500 |
| Highest Grade | Hs 6 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Machinist |
| Township / Ward | Petersburg Village |
| Est. Birth Year | ~1911 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Donna Day | Daughter | — | 2 | ~1938 |
| Delores Day | Daughter | — | 4 | ~1936 |
| John Day | Head | — | 29 | ~1911 |
| Mildred Day | Spouse | — | 26 | ~1914 |
Census Appearances
1920
Mahoning, Ohio
Son, age 9
Mahoning, Ohio · implied b. ~1911 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dey |
| Given Name | John W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Ohio |
| Mother's Birthplace | New York |
| Occupation | none |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1930
Mahoning, Ohio
Son, age 19
Mahoning, Ohio · implied b. ~1911 — 18 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Day |
| Given Name | John W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Ohio |
| Mother's Birthplace | New York |
| Occupation | Machinist |
| Industry | Machine Shop |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Mahoning-County, Ohio
Head, age 29
Mahoning-County, Ohio · implied b. ~1911 — 4 household members
| Surname | Day |
| Given Name | John W |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | Petersburg Village |
| 1935 Residence (County) | Mahoning |
| Occupation | Machinist |
| Industry | Steel Mill |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 1500 |
| Highest Grade | Hs 6 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
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 Day across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Day (~0.92 confidence) and father John Dey (~0.92 confidence) and mother Raylene Dey (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Day
b. ~1887
Source father
● Household
· direct · ~0.92
Father
John Dey
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Raylene Dey
b. ~1891
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Day
Head · 1940 · age 29 · b. ~1911 · Ohio
★ 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 — Mahoning-County, Ohio
Open full size
1940 US Federal Census — Mahoning-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03109-00966)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Algernon Rager | 30 | Head | Truck Driver | Pennsylvania |
| 2 | Hazel Rager | 28 | Wife | — | Ohio |
| 3 | Sue Rager | 9 | Daughter | — | Pennsylvania |
| 4 | Algernon Rager | 2 | Son | — | Ohio |
| 5 | Jane Huey | 77 | Head | — | Pennsylvania |
| 6 | Charles Baur | 55 | Head | Janitor | Ohio |
| 7 | Minnie Baur | 55 | Wife | — | Ohio |
| 8 | William Weyl | 57 | Brother-in-law | Asst Janitor | Ohio |
| 9 | John W Day THIS PERSON | 29 | Head | Machinist | New York |
| 10 | Mildred Day | 26 | Wife | — | Pennsylvania |
| 11 | Delores Day | 4 | Daughter | — | Ohio |
| 12 | Donna Day | 2 | Daughter | — | Ohio |
| 13 | Cora Ewing | 69 | Head | — | Pennsylvania |
| 14 | Myra Glasser | 73 | Head | — | Ohio |
| 15 | Edna V Eaton | 54 | Head | Laundress | Pennsylvania |
| 16 | Esther Eaton | 25 | Daughter | — | Ohio |
| 17 | Charles Benfeld | 22 | Head | Milkman | Ohio |
| 18 | Ethel Benfeld | 22 | Wife | — | Pennsylvania |
| 19 | Marshall Juillerat | 35 | Head | Tractor Operator | Ohio |
| 20 | Grace Juillerat | 39 | Wife | — | Pennsylvania |
| 21 | Martin Leuzinger | 28 | Head | Truck Driver | Ohio |
| 22 | Helen Leuzinger | 20 | Wife | — | Ohio |
| 23 | Dorothy Leuzinger | 2 | Daughter | — | Ohio |
| 24 | Robert A Smith | 44 | Head | Salesman | Ohio |
| 25 | Gladys Smith | 43 | Wife | — | Ohio |
| 26 | Anna J Smith | 16 | Daughter | — | Ohio |
| 27 | Anna Eaton | 79 | Head | — | Pennsylvania |
| 28 | Gilbert Kerr | 52 | Head | Laborer | Pennsylvania |
| 29 | Grace Kerr | 48 | Wife | — | Pennsylvania |
| 30 | Elizabeth Kerr | 29 | Daughter | — | Ohio |
| 31 | Everett Kerr | 20 | Son | — | Ohio |
| 32 | Harold Kerr | 16 | Son | — | Ohio |
| 33 | Evelyn Kerr | 9 | Daughter | — | Pennsylvania |
| 34 | Grace Swisher | 52 | Head | — | Pennsylvania |
| 35 | Otto Heberling | 29 | Head | Strander | Ohio |
| 36 | Lillian Heberling | 28 | Wife | — | Ohio |
| 37 | William Heberling | 11 | Son | — | Ohio |
| 38 | Edith M Heberling | 10 | Daughter | — | Ohio |
| 39 | Otto Jr Heberling | 8 | Son | — | Ohio |
| 40 | Carl Heberling | 7 | Son | — | Ohio |
Pedigree Summary
John
Gen 1 · 3 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)