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John Carroll — 1940 US Census Record
Model Tree available1940 United States Federal Census · Sheridan-County, Montana
Our Model Tree links this John Carroll across the 1920, 1930 and 1940 US Censuses in Sheridan-County, Montana (XGBoost, ~Confirmed), with identified parents John & John — first a son (b.~1917), then head of a 5-person household.
Age 23
b. ~1917
Male
Son
Born: Montana
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Sheridan-County, Montana |
| Surname | Carroll |
| Given Name | John H. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | Montana |
| 1935 Residence (City) | Plentywood City |
| 1935 Residence (County) | Sheridan |
| Additional Details | |
| Occupation | operator |
| Industry | moving picture theater |
| Class of Worker | PW |
| Hours Worked | 56 |
| Income (1939) | 480 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
| Occupation | Operator |
| Township / Ward | Plentywood City |
| Est. Birth Year | ~1917 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Janet Carroll | Daughter | — | 3 | ~1937 |
| John Carroll | Head | — | 56 | ~1884 |
| John Carroll | Son | — | 23 | ~1917 |
| Vera Carroll | Spouse | — | 54 | ~1886 |
| Olive Carroll | Spouse | — | 22 | ~1918 |
Census Appearances
1920
Sheridan, Montana
Son, age 2
Sheridan, Montana · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carroll |
| Given Name | John H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Kansas |
| Occupation | none |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1930
Sheridan, Montana
Son, age 13
Sheridan, Montana · implied b. ~1917 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carroll |
| Given Name | John H |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Kansas |
| Can Read/Write | Yes |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1940
Sheridan-County, Montana
Son, age 23
Sheridan-County, Montana · implied b. ~1917 — 5 household members
| Surname | Carroll |
| Given Name | John H. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | Montana |
| 1935 Residence (City) | Plentywood City |
| 1935 Residence (County) | Sheridan |
| Occupation | operator |
| Industry | moving picture theater |
| Class of Worker | PW |
| Hours Worked | 56 |
| Income (1939) | 480 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
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 Carroll across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Carroll (~0.92 confidence) and father John Carroll (~0.92 confidence) and mother Vera Carroll (~0.92 confidence) and mother Vera Carroll (~0.92 confidence) and mother Olive Carroll (~0.50 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.84
Father
John Carroll
b. ~1884
Source father
● Household
· direct · ~0.92
Father
John Carroll
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Vera Carroll
b. ~1886
Source mother
● Household
· direct · ~0.92
Mother
Vera Carroll
b. ~1887
Source mother
● Household
· direct · ~0.92
Mother
Olive Carroll
b. ~1918
Source mother
● Household
· direct · ~0.5
This person
Anchor record
John Carroll
Son · 1940 · age 23 · b. ~1917 · Montana
★ You are viewing this record
Sibling
Janet Carroll
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Sheridan-County, Montana
Open full size
1940 US Federal Census — Sheridan-County, Montana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02229-00369)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Eva C. Bee | 49 | sister | — | Minnesota |
| 2 | Edna M. Bee | 17 | sister | Servant | Montana |
| 3 | Doris E. Bee | 17 | sister | Cook | Montana |
| 4 | Clarence A. B. Myers | 32 | Head | Mechanic | Indiana |
| 5 | Margaret P. Myers | 28 | wife | — | Minnesota |
| 6 | Leon A. Myers | 6 | son | — | Montana |
| 7 | Neil A. Myers | 2 | son | — | Montana |
| 8 | Claude E. Wineland | 37 | Head | Mechanic | Indiana |
| 9 | Gertrude T. B. Wineland | 41 | wife | — | Minnesota |
| 10 | Martin S. Nelson | 55 | Head | Proprietor | Minnesota |
| 11 | Nora A. B. Nelson | 48 | wife | — | Wisconsin |
| 12 | Morris S. Nelson | 15 | son | — | Montana |
| 13 | Anton Jensen | 32 | lodger | Truck Driver | Denmark |
| 14 | Margaret Hill | 20 | lodger | Teacher | Utah |
| 15 | John J. Carroll | 56 | Head | Farmer | Illinois |
| 16 | Vera A. B. Carroll | 54 | wife | — | Illinois |
| 17 | John H. Carroll THIS PERSON | 23 | son | Operator | Montana |
| 18 | Olive M. Carroll | 22 | wife | — | Montana |
| 19 | Janet L. Carroll | 3 | daughter | — | Montana |
| 20 | Andrew S. Michels | 23 | Head | Farmer | Montana |
| 21 | Ruth T. B. Michels | 27 | wife | — | Minnesota |
| 22 | Michael A. Michels | 3 | son | — | Montana |
| 23 | Gordon O. Golleh | 26 | Head | Miner | Montana |
| 24 | Iling A. Golleh | 20 | wife | — | Montana |
| 25 | Dale M. Golleh | 1 | son | — | Montana |
| 26 | Ruby W. Golleh | 0 | daughter | — | Montana |
| 27 | Oscar T. Benson | 23 | Head | — | Sweden |
| 28 | Christine J. B. Benson | 63 | wife | — | Sweden |
| 29 | Betty P. Benson | 14 | daughter | — | Montana |
| 30 | Richard H. Groth | 50 | Head | Plumber | Iowa |
| 31 | Amy B. B. Groth | 50 | wife | — | Iowa |
| 32 | George A. Munson | 77 | brother-in-law | — | Iowa |
| 33 | James P. Doran | 29 | nephew | Apprentice Plumber | Iowa |
| 34 | Otto L. Lilly | 55 | Head | Proprietor | South Dakota |
| 35 | Christina R. Lilly | 54 | wife | — | South Dakota |
| 36 | Irvin O. Lilly | 28 | son | 84 | South Dakota |
| 37 | Arnon C. Lilly | 25 | daughter | — | South Dakota |
| 38 | Gordon R. Lilly | 8 | son | — | Canada |
| 39 | Annie A. Hagan | 23 | Head | Beautician | Montana |
| 40 | John A. Lorenz | 67 | Head | Proprietor | Norway |
Pedigree Summary
John + 1 sibling
Gen 1 · 5 parents
~0.84
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)