EC
Earl Campbell — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Yellowstone-County, Montana
Our Model Tree links this Earl Campbell across the 1920, 1930 and 1940 US Censuses in Yellowstone-County, Montana (XGBoost, ~Confirmed) — first a head (b.~1884), then head of a 3-person household.
Age 56
b. ~1884
Male
Head
Born: Nebraska
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Yellowstone-County, Montana |
| Surname | Campbell |
| Given Name | Earl |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | Nebraska |
| 1935 Residence (City) | Billings City |
| 1935 Residence (County) | Yellowstone |
| Additional Details | |
| Occupation | Engineer |
| Industry | Railroad |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 322 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
| Occupation | Engineer |
| Township / Ward | Billings City |
| Est. Birth Year | ~1884 |
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 Earl | Age | Birth yr |
|---|---|---|---|---|
| Ivel Campbell | Spouse | — | 47 | ~1893 |
| Earl Campbell | Head | — | 56 | ~1884 |
| Donald Campbell | Son | — | 4 | ~1936 |
Census Appearances
1920
Yellowstone, Montana
Head, age 37
Yellowstone, Montana · implied b. ~1883 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Earl |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Nebraska |
| Father's Birthplace | Nebraska |
| Mother's Birthplace | Nebraska |
| Occupation | Engineer |
| Industry | N. P. R. R. |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
1930
Yellowstone, Montana
Head, age 47
Yellowstone, Montana · implied b. ~1883 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Earl E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Nebraska |
| Age at First Marriage | 30 |
| Father's Birthplace | Nebraska |
| Mother's Birthplace | Missouri |
| Occupation | Engineer |
| Industry | Locomotive |
| Class of Worker | 8977 |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 6000 |
| Radio Set | R |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
1940
Yellowstone-County, Montana
Head, age 56
Yellowstone-County, Montana · implied b. ~1884 — 3 household members
| Surname | Campbell |
| Given Name | Earl |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | Nebraska |
| 1935 Residence (City) | Billings City |
| 1935 Residence (County) | Yellowstone |
| Occupation | Engineer |
| Industry | Railroad |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 322 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
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 Earl Campbell across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Earl Campbell
Head · 1940 · age 56 · b. ~1884 · Montana
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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 — Yellowstone-County, Montana
Open full size
1940 US Federal Census — Yellowstone-County, Montana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02234-00432)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ruby Jamieson | 66 | Mother-in-law | — | Michigan |
| 2 | John Arthur Neithercut | 15 | Nephew | — | South Dakota |
| 3 | Victor E. Garnpuck|Garnpuch | 61 | Head | Salesman | Pennsylvania |
| 4 | Corrine Garnpuck|Garnpuch | 54 | Wife | — | Kansas |
| 5 | Rosemary Garnpuck|Garnpuch | 26 | Daughter | Auditor | Montana |
| 6 | Victor Jr. Garnpuck|Garnpuch | 18 | Son | — | Montana |
| 7 | Phyllis Garnpuck|Garnpuch | 14 | Daughter | — | Montana |
| 8 | Ralph M. Tidball | 39 | Head | Traveling Salesman | Nebraska |
| 9 | Olga D. Tidball | 39 | Wife | — | Wisconsin |
| 10 | Ralph Jr. Tidball | 15 | Son | — | Wisconsin |
| 11 | Lloyd Tidball | 14 | Son | — | Wisconsin |
| 12 | Eugene Tidball | 10 | Son | — | Wisconsin |
| 13 | Ben B. Hagerman | 46 | Head | Operator | Montana |
| 14 | Laura Hagerman | 48 | Wife | — | Montana |
| 15 | Don Hagerman | 14 | Son | Delivery Boy | Montana |
| 16 | Mary Lynne Hagerman | 5 | Daughter | — | Montana |
| 17 | Charles Rogers | 20 | Lodger | Delivery | Montana |
| 18 | Ione H. Rogers | 19 | Maid | Housework | Montana |
| 19 | Frances Rossiter | 65 | Head | — | Nevada |
| 20 | Medora Vale | 69 | Sister | — | Nevada |
| 21 | H. E. Biddinger | 56 | Head | Teacher | Indiana |
| 22 | Thelma S. Biddinger | 55 | Wife | — | Wisconsin |
| 23 | Earl Campbell THIS PERSON | 56 | Head | Engineer | Nebraska |
| 24 | Ivel Campbell | 47 | Wife | — | Wisconsin |
| 25 | Donald Campbell | 4 | Son | — | Montana |
| 26 | Harry J. Corby | 52 | Head | Chief Clerk | Wyoming |
| 27 | Florence M. Corby | 45 | Wife | — | Nebraska |
| 28 | Harry A. Corby | 21 | Son | — | Wyoming |
| 29 | George J. Corby | 15 | Son | Attendant | Wyoming |
| 30 | Robert Cantrell | 42 | Head | Accounting | Missouri |
| 31 | Bessie E. Cantrell | 36 | Wife | — | Oklahoma |
| 32 | Donald Cantrell | 20 | Son | Accounting | Montana |
| 33 | Robert D. Cantrell | 17 | Son | Apprentice Mechanic | Montana |
| 34 | Donald Hudson | 23 | Nephew | Bookkeeper | Missouri |
| 35 | Roy Harry Evans | 52 | Brother-in-law | Car Repairer | Iowa |
| 36 | Martin Overgaard | 46 | Head | Special Investigator | Minnesota |
| 37 | June Overgaard | 37 | Wife | — | Wyoming |
| 38 | Ulyssa J. Overgaard | 18 | Daughter | — | Wyoming |
| 39 | Roberta Overgaard | 16 | Daughter | New Worker | Wyoming |
| 40 | Raymond Overgaard | 15 | Son | — | South Dakota |
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)