RJ
Robert Johnston — 1940 US Census Record
Model Tree available1940 United States Federal Census · Ravalli-County, Montana
Our Model Tree links this Robert Johnston across the 1920, 1930 and 1940 US Censuses in Ravalli-County, Montana (XGBoost, ~Confirmed), with identified parents Abraham & Mabel — first a head (b.~1903), then head of a 3-person household.
Age 37
b. ~1903
Male
Head
Born: Montana
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Ravalli-County, Montana |
| Surname | Johnston |
| Given Name | Robert C. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Montana |
| 1935 Residence (City) | Hamilton City |
| 1935 Residence (County) | Ravalli |
| Additional Details | |
| Occupation | Clerk |
| Industry | Liquor Store |
| Class of Worker | GW |
| Hours Worked | 48 |
| Income (1939) | 1600 |
| Highest Grade | C 1 |
| 1935 Residence | Same place |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
| Occupation | Clerk |
| Township / Ward | Hamilton City |
| Est. Birth Year | ~1903 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Sharon Johnston | Daughter | — | 1 | ~1939 |
| Robert Johnston | Head | — | 37 | ~1903 |
| Florence Johnston | Spouse | — | 31 | ~1909 |
Census Appearances
1920
Ravalli, Montana
Son, age 17
Ravalli, Montana · implied b. ~1903 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnston |
| Given Name | Robert L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Nevada |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1930
Ravalli, Montana
Son, age 27
Ravalli, Montana · implied b. ~1903 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnston |
| Given Name | Robert C. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Montana |
| Age at First Marriage | No |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Nevada |
| Occupation | Stockman |
| Industry | Ranch |
| Class of Worker | 1110 |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1940
Ravalli-County, Montana
Head, age 37
Ravalli-County, Montana · implied b. ~1903 — 3 household members
| Surname | Johnston |
| Given Name | Robert C. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Montana |
| 1935 Residence (City) | Hamilton City |
| 1935 Residence (County) | Ravalli |
| Occupation | Clerk |
| Industry | Liquor Store |
| Class of Worker | GW |
| Hours Worked | 48 |
| Income (1939) | 1600 |
| Highest Grade | C 1 |
| 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 Robert Johnston across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Abraham Johnston (~0.92 confidence) and mother Mabel Johnston (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Abraham Johnston
b. ~1868
Source father
● Household
· direct · ~0.92
Mother
Mabel Johnston
b. ~1873
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Johnston
Head · 1940 · age 37 · b. ~1903 · 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 — Ravalli-County, Montana
Open full size
1940 US Federal Census — Ravalli-County, Montana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02227-00780)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Harold B. Stanton | 35 | Head | Manager | Montana |
| 2 | Frances H. Stanton | 35 | Wife | — | Pennsylvania |
| 3 | Harold F. Stanton | 5 | Son | — | — |
| 4 | Robert C. Johnston THIS PERSON | 37 | Head | Clerk | Montana |
| 5 | Florence S. Johnston | 31 | Wife | — | Illinois |
| 6 | Sharon L. Johnston | 1 | Daughter | — | — |
| 7 | Theodore Lynch | 41 | Head | Electrical | Montana |
| 8 | Mary A. Lynch | 32 | Wife | — | Montana |
| 9 | Mary Lou Lynch | 5 | Daughter | — | — |
| 10 | Eddie Lynch | 3 | Son | — | — |
| 11 | Carol Ann Lynch | 1 | Daughter | — | — |
| 12 | Robert C. Cain | 28 | Head | Meat Cutter | Wisconsin |
| 13 | Margit Ann Cain | 23 | Wife | — | Minnesota |
| 14 | Roberta Ann Cain | 2 | Daughter | — | — |
| 15 | Carl S. Ullom | 29 | Head | Mechanic | Ohio |
| 16 | Grace Ullom | 24 | Wife | — | Montana |
| 17 | Teddy Ullom | 10 | Son | — | Montana |
| 18 | Mary Jane Kattelus | 8 | Step-daughter | — | Washington |
| 19 | Ray L. Perry | 64 | Head | Mail Carrier | Minnesota |
| 20 | Millie Perry | 60 | Wife | — | Missouri |
| 21 | Celia Morley | 36 | Daughter | Clerk | Montana |
| 22 | Merritt R. Towne | 68 | Head | — | Pennsylvania |
| 23 | Orpha Towne | 65 | Wife | — | Minnesota |
| 24 | Paul S. Sherman | 25 | Head | Laboratory Attendant | Montana |
| 25 | Charlotte B. Sherman | 22 | Wife | — | Montana |
| 26 | H. M. Anderson | 55 | Head | Clerk Of District Court | Kentucky |
| 27 | Lenore Anderson | 47 | Wife | — | Ohio |
| 28 | Ben E. Anderson | 26 | Son | Junior Clerk | Montana |
| 29 | Robert H. Anderson | 23 | Son | Clerk | Montana |
| 30 | Caroline M. Hark | 57 | Head | Clerk | Illinois |
| 31 | Edward E. Morris | 35 | Head | Assistant Civil Engineer | South Dakota |
| 32 | Sofie A. Morris | 36 | Wife | — | Missouri |
| 33 | Arthur Morris | 4 | Son | — | — |
| 34 | Minrod J. Iter | 60 | Head | Body & Fender Man | Switzerland |
| 35 | Amelia E. Iter | 56 | Wife | — | England |
| 36 | Alice M. Iter | 25 | Daughter | Clerk | Montana |
| 37 | Millie E. Iter | 18 | Daughter | — | Montana |
| 38 | Sophie L. Roberts | 67 | Head | — | New York |
| 39 | David L. Roberts | 38 | Son | Doctor | Montana |
| 40 | Lee L. Brown | 54 | Head | Service Station Attendant | Maine |
Pedigree Summary
Robert
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)