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James Day — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Jo-Daviess-County, Illinois
Our Model Tree links this James Day across the 1920, 1930 and 1940 US Censuses in Jo-Daviess-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1897), then head of a 3-person household.
Age 43
b. ~1897
Male
Head
Born: Wisconsin
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Jo-Daviess-County, Illinois |
| Surname | Day |
| Given Name | James P. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Galena City |
| 1935 Residence (County) | Jo Daviess |
| Additional Details | |
| Occupation | Bookkeeping |
| Industry | Interstate Light & Power Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1500 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
| Occupation | Bookkeeping |
| Township / Ward | Galena 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 James | Age | Birth yr |
|---|---|---|---|---|
| Shirley Day | Daughter | — | 13 | ~1927 |
| James Day | Head | — | 43 | ~1897 |
| Mattie Day | Spouse | — | 42 | ~1898 |
Census Appearances
1920
Jo Daviess, …
Head, age 23
Jo Daviess, Illinois · implied b. ~1897 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Day |
| Given Name | James T. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | New Hampshire |
| Occupation | Timekeeper |
| Industry | El. Light Co. |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1930
Jo Daviess, …
Head, age 33
Jo Daviess, Illinois · implied b. ~1897 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Day |
| Given Name | James I |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| Age at First Marriage | 23 |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Massachusetts |
| Occupation | Oil Station |
| Industry | Own Station |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | Yes WW |
| Home Value / Rent | R |
| Radio Set | 18.00 |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1940
Jo-Daviess-County, Illinois
Head, age 43
Jo-Daviess-County, Illinois · implied b. ~1897 — 3 household members
| Surname | Day |
| Given Name | James P. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Galena City |
| 1935 Residence (County) | Jo Daviess |
| Occupation | Bookkeeping |
| Industry | Interstate Light & Power Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1500 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
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 James Day across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Day
Head · 1940 · age 43 · b. ~1897 · Illinois
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Jo-Daviess-County, Illinois
Open full size
1940 US Federal Census — Jo-Daviess-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00817-00539)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | David Carson Scott | 19 | Son | Commercial | Iowa |
| 2 | Mary E. Crawford | 41 | Roomer | Teacher | Iowa |
| 3 | Robert P. Nalbert | 26 | Roomer | Printer | Illinois |
| 4 | Mildred Heath | 40 | Roomer | Teacher | Illinois |
| 5 | Wm. Hurst | 58 | Head | — | Wisconsin |
| 6 | Elizabeth T. Hurst | 52 | Wife | — | Illinois |
| 7 | Elizabeth Wieling | 62 | Servant | Maid | Illinois |
| 8 | Virgil Miller | 26 | Head | Labor | Wisconsin |
| 9 | Vera Miller | 24 | Wife | — | Illinois |
| 10 | Verlea Miller | 2 | Daughter | — | Illinois |
| 11 | Lois Miller | 1 | Daughter | — | Illinois |
| 12 | Carl Leniper | 69 | Head | — | Illinois |
| 13 | Anna Leniper | 67 | Wife | — | Illinois |
| 14 | Kate Schmidt | 75 | Head | — | Illinois |
| 15 | H. Y. Cromer | 53 | Head | Bartender | Illinois |
| 16 | Bertha C. Cromer | 52 | Wife | — | Iowa |
| 17 | Walter Trautwein | 42 | Head | Carpenter | Illinois |
| 18 | Henry Kort | 74 | Head | — | Germany |
| 19 | Louisa Kort | 72 | Wife | — | Germany |
| 20 | Helmar Appuhn | 50 | Head | Salesman | Illinois |
| 21 | Irene Appuhn | 49 | Wife | — | Illinois |
| 22 | Elizabeth Martin | 78 | Head | — | Michigan |
| 23 | Bertha Wise | 51 | Head | Practical Nurse | Illinois |
| 24 | John Wise | 58 | Husband | Cigar Maker | Illinois |
| 25 | Marie Harbeck | 48 | Sister | — | Illinois |
| 26 | Helene Harbeck | 19 | Niece | — | Illinois |
| 27 | Wm. Lenox | 43 | Head | Carpenter | Illinois |
| 28 | Bertha Lenox | 41 | Wife | Inspector | Illinois |
| 29 | Blair Bowling | 34 | Head | Dealer | Iowa |
| 30 | Alice Bowling | 25 | Wife | — | S. Dakota |
| 31 | Katheryn Bowling | 7 | Daughter | — | Iowa |
| 32 | Danny Bowling | 2 | Son | — | Iowa |
| 33 | James P. Day THIS PERSON | 43 | Head | Bookkeeping | Wisconsin |
| 34 | Mattie Day | 42 | Wife | — | Illinois |
| 35 | Shirley Day | 13 | Daughter | Office Girl | Illinois |
| 36 | Raymond Glick | 34 | Head | Mechanic | Illinois |
| 37 | Frances Glick | 31 | Wife | — | Illinois |
| 38 | Robert Glick | 12 | Son | — | Illinois |
| 39 | Henry F. Cromer | 66 | Head | — | Iowa |
| 40 | Keeley|Feeley Cromer | None | Bertha | — | Hs 4 |
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)