JD
James Day — 1940 US Census Record
Model Tree available1940 United States Federal Census · Mclean-County, Illinois
Our Model Tree links this James Day across the 1920, 1930 and 1940 US Censuses in Mclean-County, Illinois (XGBoost, ~Confirmed), with identified parents John & Mary — first a head (b.~1915), then head of a 4-person household.
Age 25
b. ~1915
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Mclean-County, Illinois |
| Surname | Day |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Bloomington |
| 1935 Residence (County) | McLean |
| Additional Details | |
| Occupation | Truck driver |
| Industry | Retail coal ice |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 771 |
| Highest Grade | Hs 4 |
| 1935 Residence | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Truck Driver |
| Township / Ward | Normal |
| Est. Birth Year | ~1915 |
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 James | Age | Birth yr |
|---|---|---|---|---|
| Anna Day | Daughter | — | ~1940 | |
| Mary Day | Daughter | — | 2 | ~1938 |
| James Day | Head | — | 25 | ~1915 |
| Margaret Day | Spouse | — | 22 | ~1918 |
Census Appearances
1920
Mclean, Illinois
Son, age 4
Mclean, Illinois · implied b. ~1916 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Day |
| Given Name | James S. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Mclean, Illinois
Son, age 14
Mclean, Illinois · implied b. ~1916 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Day |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Mclean-County, Illinois
Head, age 25
Mclean-County, Illinois · implied b. ~1915 — 4 household members
| Surname | Day |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Bloomington |
| 1935 Residence (County) | McLean |
| Occupation | Truck driver |
| Industry | Retail coal ice |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 771 |
| Highest Grade | Hs 4 |
| 1935 Residence | Illinois |
| 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 James 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 mother Mary Day (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Day
b. ~1870
Source father
● Household
· direct · ~0.92
Mother
Mary Day
b. ~1873
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Day
Head · 1940 · age 25 · b. ~1915 · 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 — Mclean-County, Illinois
Open full size
1940 US Federal Census — Mclean-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00842-00643)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Louis Miller | 28 | Head | Butcher | Illinois |
| 2 | Bessie Miller | 35 | Wife | Housewife | Illinois |
| 3 | Jean B. Gains | 13 | Step son | — | Illinois |
| 4 | Harlan C. Gains | 11 | Step son | — | Illinois |
| 5 | Emma E. Burt | 60 | Mother in law | Retired Nurse | Illinois |
| 6 | Carl Jones | 23 | Head | Laborer | Illinois |
| 7 | Ruth Jones | 23 | Wife | Housewife | Illinois |
| 8 | This Finishes All Territory Up To And Including The South Side Of E. Mulberry Street | None | — | — | — |
| 9 | Ida Hargit | 79 | Head | Housewife | Illinois |
| 10 | William Cates | 40 | Head | Fireman | Illinois |
| 11 | Flossie Cates | 40 | Wife | Housewife | Illinois |
| 12 | Vernon Cates | 14 | Son | Student | Illinois |
| 13 | Forrest Cates | 12 | Son | — | Illinois |
| 14 | Vera Cates | 9 | Daughter | — | Illinois |
| 15 | Virgil Cates | 9 | Son | — | Illinois |
| 16 | Ruth Cates | 7 | Daughter | — | Illinois |
| 17 | Dale Cates | 2 | Son | — | Illinois |
| 18 | Ida Jackson | 66 | Head | Housewife | Illinois |
| 19 | Henry Jackson | 40 | Son | Mail Messenger | Illinois |
| 20 | Russell Glasener | 47 | Head | Economic Instructor | Iowa |
| 21 | Mabel Glasener | 51 | Wife | Housewife | Iowa |
| 22 | Miriam Glasener | 21 | Daughter | Student | Iowa |
| 23 | Virginia Glasener | 20 | Daughter | Student | Iowa |
| 24 | Ed Cooper | 60 | Head | Carpenter | Indiana |
| 25 | Clarence Herstrom | 40 | Head | Steam Fitter | Michigan |
| 26 | Hazel Herstrom | 36 | Wife | Housewife | Illinois |
| 27 | Glenn Herstrom | 3 | Son | — | Illinois |
| 28 | John Mcguire | 63 | Head | Retired Farmer | Illinois |
| 29 | Louise Mcguire | 57 | Wife | Housewife | Illinois |
| 30 | Frank D. Whitman | 44 | Head | Rural Mail Carrier | Nebraska |
| 31 | Alice Whitman | 45 | Wife | Housewife | Illinois |
| 32 | Ruth Whitman | 20 | Daughter | Practical Nurse | Illinois |
| 33 | June Whitman | 19 | Daughter | Stenographer | Illinois |
| 34 | Louise Whitman | 17 | Daughter | — | Illinois |
| 35 | Burton Whitman | 11 | Son | — | Illinois |
| 36 | James Day THIS PERSON | 25 | Head | Truck Driver | Illinois |
| 37 | Margaret Day | 22 | Wife | Housewife | Illinois |
| 38 | Mary Alice Day | 2 | Daughter | — | Illinois |
| 39 | Anna Jean Day | 0 | Daughter | — | Illinois |
| 40 | Charles C. Watkins | 55 | Head | Bus Operator | Illinois |
Pedigree Summary
James
Gen 1 · 2 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)