JD
James Day — 1940 US Census Record
Model Tree available1940 United States Federal Census · Fergus-County, Montana
Our Model Tree links this James Day across the 1920, 1930 and 1940 US Censuses in Fergus-County, Montana (XGBoost, ~Confirmed), with identified parents Robert & Catherine — first a head (b.~1914), then head of a 3-person household.
Age 26
b. ~1914
Male
Head
Born: Wisconsin
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Fergus-County, Montana |
| Surname | Day |
| Given Name | James F. |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| 1935 Residence (City) | School District 12 |
| 1935 Residence (County) | Fergus |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 452 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
| Occupation | Farmer |
| Township / Ward | School District 12 |
| Est. Birth Year | ~1914 |
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 |
|---|---|---|---|---|
| James Day | Head | — | 26 | ~1914 |
| Robert Day | Son | — | 3 | ~1937 |
| Marguerite Day | Spouse | — | 26 | ~1914 |
Census Appearances
1920
Fergus, Montana
Son, age 6
Fergus, Montana · implied b. ~1914 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Day |
| Given Name | James Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Montana |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1930
Fergus, Montana
Son, age 16
Fergus, Montana · implied b. ~1914 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Day |
| Given Name | James F. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Montana |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1940
Fergus-County, Montana
Head, age 26
Fergus-County, Montana · implied b. ~1914 — 3 household members
| Surname | Day |
| Given Name | James F. |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| 1935 Residence (City) | School District 12 |
| 1935 Residence (County) | Fergus |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 452 |
| Highest Grade | H 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. Identified parents: father Robert Day (~0.82 confidence) and mother Catherine Day (~0.82 confidence) and mother Kate Day (~0.82 confidence) and father James Day (~0.92 confidence) and mother Alberta Day (~0.92 confidence). The pedigree spans 2 generations with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.86
Father
Robert Day
b. ~1843
Source father>father
● Household
· direct · ~0.82
Mother
Catherine Day
b. ~1854
Source father>mother
● Household
· direct · ~0.82
Mother
Kate Day
b. ~1875
Source father>mother
● Household
· direct · ~0.82
Father
James Day
b. ~1894
Source father
● Household
· direct · ~0.92
Mother
Alberta Day
b. ~1895
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Day
Head · 1940 · age 26 · b. ~1914 · Montana
★ 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 — Fergus-County, Montana
Open full size
1940 US Federal Census — Fergus-County, Montana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02218-00400)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Alice Charbonneau | 4 | daughter | — | Montana |
| 42 | Alfred Charbonneau | 3 | son | — | Montana |
| 43 | Richard Charbonneau | 1 | son | — | Montana |
| 44 | Rosalie Charbonneau | 0 | daughter | — | Montana |
| 45 | John Carlson | 75 | head | — | Sweden |
| 46 | Harry Carlson | 47 | son | Farmer | Connecticut |
| 47 | Frank Carlson | 39 | son | Farmer | Connecticut |
| 48 | Charles Nelson | 41 | head | 60 | Montana |
| 49 | Frances Nelson | 41 | wife | — | Missouri |
| 50 | Jack Hendrick | 60 | head | Farmer | Missouri |
| 51 | Margaret Hendrick | 52 | wife | 0 | Montana |
| 52 | William Myers | 62 | hired hand | Farm Laborer | New Jersey |
| 53 | Harold Nelson | 30 | head | 60 | Montana |
| 54 | Dorothy Nelson | 28 | wife | Waitress | South Dakota |
| 55 | John Jackson | 2 | son | — | South Dakota |
| 56 | Erval Nelson | 24 | head | 60 | Montana |
| 57 | Thelma Nelson | 21 | wife | 0 | Montana |
| 58 | Sherry Nelson | 1 | daughter | 0 | Montana |
| 59 | Patricia Nelson | 2 | daughter | 0 | Montana |
| 60 | Eugene Nelson | 31 | brother | 60 | Montana |
| 61 | Frank G. Bowman | 71 | head | 50 | Kansas |
| 62 | Cora M. Bowman | 65 | wife | 0 | Kansas |
| 63 | Coleman Jackelin | 20 | hired hand | 50 | Montana |
| 64 | Howard Mosely | 22 | head | 60 | Montana |
| 65 | Ethelyn Mosely | 34 | wife | 0 | Montana |
| 66 | Lawrence Mosely | 1 | son | 0 | Montana |
| 67 | James R. Day | 46 | head | Farmer | Wisconsin |
| 68 | Margaret M. Day | 33 | wife | 0 | Montana |
| 69 | James F. Day THIS PERSON | 26 | head | Farmer | Wisconsin |
| 70 | Marguerite Day | 26 | wife | 0 | Montana |
| 71 | Robert J. Day | 3 | son | 0 | Montana |
| 72 | Denis B. Crowley | 52 | head | 0 | Montana |
| 73 | George W. Hoover | 36 | partner | 0 | Iowa |
| 74 | George H. Ruckman | 39 | head | 44 | Iowa |
| 75 | Daisy O. Ruckman | 38 | wife | — | Colorado |
| 76 | George R. Ruckman | 16 | son | 0 | Montana |
| 77 | Margaret Ruckman | 14 | daughter | 0 | Montana |
| 78 | Jack Ruckman | 12 | son | 0 | Montana |
| 79 | Alfred Dresen | 33 | head | Mechanic | Nebraska |
| 80 | Esther Dresen | 28 | wife | 0 | Montana |
Pedigree Summary
James
Gen 1 · 2 parents
~0.92
Gen 2 · 3 grandparents
~0.82
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)