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Ole Olson — 1920 US Census Record
Model Tree available1920 United States Federal Census · Fergus, Montana
Our Model Tree links this Ole Olson across the 1920, 1930 and 1940 US Censuses in Fergus, Montana (XGBoost, ~Confirmed), with identified parents Jonas & Amelia — first a son (b.~1911), then head of a 6-person household.
Age 9
b. ~1911
Male
Son
Born: Montana
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Fergus, Montana |
| Surname | Olson |
| Given Name | Ole |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Additional Details | |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
| Township / Ward | School District 169 |
| Est. Birth Year | ~1911 |
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.
6 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Ole | Age | Birth yr |
|---|---|---|---|---|
| Ole Olson | Son | — | 9 | ~1911 |
| Jonas Olson | Son | — | 5 | ~1915 |
| Arnold Olson | Son | — | 2 | ~1918 |
| Agnes Olson | Daughter | — | 7 | ~1913 |
| Jonas Olson | Head | — | 42 | ~1878 |
| Amelia Olson | Spouse | — | 32 | ~1888 |
Census Appearances
1920
Fergus, Montana
Son, age 9
Fergus, Montana · implied b. ~1911 — 6 household members
| Surname | Olson |
| Given Name | Ole |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1930
Fergus, Montana
Son, age 19
Fergus, Montana · implied b. ~1911 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olsen |
| Given Name | Ole R |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Occupation | Farm laborer |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1940
Petroleum-County, Montana
Head, age 29
Petroleum-County, Montana · implied b. ~1911
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | Olsen |
| Given Name | Ole R. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Montana |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Petroleum |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 56 |
| Income (1939) | 0 |
| Highest Grade | Hs 2 |
| 1935 Residence | Montana |
| 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 Ole Olson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Jonas Olson (~0.92 confidence) and mother Amelia Olsen (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Jonas Olson
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Amelia Olsen
b. ~1888
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Ole Olson
Son · 1920 · age 9 · b. ~1911 · Montana
★ You are viewing this record
Sibling
Jonas Olson
Sibling · 1920 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Agnes Olson
Sibling · 1920 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Arnold Olson
Sibling · 1920 · age 2
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
1920 US Federal Census — Fergus, Montana
Open full size
1920 US Federal Census — Fergus, Montana
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu970unit:0432)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Miss Hass | 27 | Head | Farmer | Minnesota |
| 52 | John H. Morrison | 50 | Head | Farmer | Illinois |
| 53 | George L. Harris | 36 | Head | Farmer | Montana |
| 54 | Andrew Lewis | 57 | Head | Farmer | Illinois |
| 55 | Emma J. Lewis | 57 | Wife | — | Kentucky |
| 56 | Andrew E. Lewis | 18 | Son | Farm Laborer | Illinois |
| 57 | Earl B. Modlin | 28 | Head | Farmer | Illinois |
| 58 | Helen R. Modlin | 20 | Wife | — | Iowa |
| 59 | Earl S. Modlin | 1 | Son | — | Montana |
| 60 | Ilo P. Cotchoff | 30 | Head | Farmer | Macedonia|Bulgaria |
| 61 | Mary Cotchoff | 19 | Wife | — | Bohemia |
| 62 | Louis Cotchoff | 1 | Son | — | Montana |
| 63 | George Cotchoff | 0 | Son | — | Montana |
| 64 | Vance Cotchoff | 34 | Brother | Farm Laborer | Macedonia|Bulgaria |
| 65 | Kosta Marinoff | 26 | Head | Farmer | Bulgaria |
| 66 | Alonzo Turner | 36 | Head | Stock Raiser | Wisconsin |
| 67 | Edna E. Turner | 32 | Wife | — | Iowa |
| 68 | Dwight E. Turner | 30 | Brother | Laborer | North Dakota |
| 69 | Willard Kenaston | 27 | Hired help | Laborer | Nebraska |
| 70 | John G. Loesch | 33 | Head | Farmer | Indiana |
| 71 | Mary A. Loesch | 44 | Wife | — | Missouri |
| 72 | Isaac J. Moody | 65 | Head | Farm Laborer | Iowa |
| 73 | Eliza J. Moody | 64 | Wife | — | Connecticut |
| 74 | Wallace S. Daugherty | 53 | Head | Farmer | Ohio |
| 75 | Edna Daugherty | 44 | Wife | — | Wisconsin |
| 76 | Ada C. Welsh | 28 | Head | Farmer | Missouri |
| 77 | Robert H. Welsh | 9 | Son | — | Montana |
| 78 | Kenneth M. Welsh | 5 | Son | — | Montana |
| 79 | Nellie A. Welsh | 3 | Daughter | — | Montana |
| 80 | June Welsh | 1 | Daughter | — | Montana |
| 81 | Merl Pickard | 12 | Niece | — | Wisconsin |
| 82 | Ray W. Merr | 28 | Head | Farmer | Nebraska |
| 83 | Nikoline Merr | 27 | Wife | — | Denmark |
| 84 | Peter H. Lund | 30 | Head | Farmer | Denmark |
| 85 | Jonas Olson | 42 | Head | Farmer | Norway |
| 86 | Amelia Olson | 32 | Wife | — | Norway |
| 87 | Ole Olson THIS PERSON | 9 | Son | — | Montana |
| 88 | Agnes Olson | 7 | Daughter | — | Montana |
| 89 | Jonas Olson | 5 | Son | — | Montana |
| 90 | Arnold Olson | 2 | Son | — | Montana |
| 91 | Harold Raaland | 24 | Head | Farmer | Norway |
| 92 | Ed. W. Cooper | 53 | Head | Farmer | West Virginia |
| 93 | Lena J. Cooper | 40 | Wife | — | Nebraska |
| 94 | Lillian Cooper | 7 | Daughter | — | Montana |
| 95 | Margaret Cooper | 5 | Daughter | — | Montana |
| 96 | Mason A. Rigg | 71 | Head | — | Norway |
| 97 | Elmer A. Purdy | 25 | Head | Farmer | Tennessee |
| 98 | Verna B. Purdy | 25 | Wife | — | Missouri |
| 99 | Walter C. Purdy | 1 | Son | — | Montana |
| 100 | Adolph Laschet | 44 | Head | Farmer | Germany |
Pedigree Summary
Ole + 3 siblings
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 1920 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)