RO
Ruth Olson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Marion-County, Indiana
Our Model Tree links this Ruth Olson across the 1920, 1930 and 1940 US Censuses in Marion-County, Indiana (XGBoost, ~Confirmed), with identified parents Frederick & Fredrick — first a daughter (b.~1915), then head of a 5-person household.
Age 25
b. ~1915
Female
Daughter
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Indiana |
| Surname | Olson |
| Given Name | Ruth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Occupation | Clerk |
| Industry | Dry Goods Store |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 800 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | Clerk |
| Township / Ward | Indianapolis |
| Est. Birth Year | ~1915 |
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 Ruth | Age | Birth yr |
|---|---|---|---|---|
| Frederick Olson | Head | — | 58 | ~1882 |
| Rosilla Olson | Spouse | — | 60 | ~1880 |
| Frederick Olson | Son | — | 20 | ~1920 |
| Ruth Olson | Daughter | — | 25 | ~1915 |
| Charlotte Olson | Daughter | — | 18 | ~1922 |
Census Appearances
1920
Marion, Indiana
Daughter, age 5
Marion, Indiana · implied b. ~1915 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olson |
| Given Name | Ruth M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Indiana |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Marion, Indiana
Daughter, age 15
Marion, Indiana · implied b. ~1915 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olson |
| Given Name | Ruth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Indiana |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Marion-County, Indiana
Daughter, age 25
Marion-County, Indiana · implied b. ~1915 — 5 household members
| Surname | Olson |
| Given Name | Ruth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Occupation | Clerk |
| Industry | Dry Goods Store |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 800 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
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 Ruth Olson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Frederick Olson (~0.92 confidence) and father Fredrick Olson (~0.92 confidence) and father Fredrick Olson (~0.92 confidence) and mother Rosilla Olson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Frederick Olson
b. ~1882
Source father
● Household
· direct · ~0.92
Father
Fredrick Olson
b. ~1883
Source father
● Household
· direct · ~0.92
Father
Fredrick Olson
b. ~1882
Source father
● Household
· direct · ~0.92
Mother
Rosilla Olson
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Ruth Olson
Daughter · 1940 · age 25 · b. ~1915 · Indiana
★ You are viewing this record
Sibling
Frederick Olson
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charlotte Olson
Sibling · 1940 · age 18
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 — Marion-County, Indiana
Open full size
1940 US Federal Census — Marion-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01122-00155)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Claude R. Griffith | 29 | Head | Manager | Indiana |
| 42 | Marcella Griffith | 28 | Wife | — | Indiana |
| 43 | J. Kay Griffith | 5 | Daughter | — | Indiana |
| 44 | Frederick W. Olson | 58 | Head | — | Sweden |
| 45 | Rosilla A. Olson | 60 | Wife | — | Indiana |
| 46 | Ruth Olson THIS PERSON | 25 | Daughter | Clerk | Indiana |
| 47 | Frederick Olson | 20 | Son | Laborer | Indiana |
| 48 | Charlotte Olson | 18 | Daughter | Press Operator | Indiana |
| 49 | Charles Allee | 47 | Head | Motor Car Salesman | Michigan |
| 50 | Berna Allee | 44 | Wife | Power Machine Operator | Indiana |
| 51 | Robert L. Phillips | 25 | Head | Assistant Manager | Indiana |
| 52 | Leora Phillips | 24 | Wife | — | Indiana |
| 53 | Carol Ann Phillips | 4 | Daughter | — | Indiana |
| 54 | Ronald Lee Phillips | 1 | Son | — | Indiana |
| 55 | John Staley | 57 | Head | Owner | Indiana |
| 56 | Julia Staley | 53 | Wife | — | Indiana |
| 57 | Harry Staley | 24 | Son | Salesman | Indiana |
| 58 | Helen Valentine | 31 | Daughter | Inspector | Indiana |
| 59 | Donald Valentine | 8 | Grandson | — | Indiana |
| 60 | Carl R. Green | 31 | Head | Maintenance Man | Indiana |
| 61 | Gladys Lee Green | 23 | Wife | — | Indiana |
| 62 | Earline Green | 5 | Daughter | — | Indiana |
| 63 | Paul Baker | 30 | Head | Electrical Engineer | Indiana |
| 64 | Ila Baker | 28 | Wife | — | Indiana |
| 65 | Mabel Eileen Baker | 1 | Daughter | — | Indiana |
| 66 | — | None | — | — | — |
| 67 | William L. Perry | 65 | Head | Machinist | Indiana |
| 68 | Hattie A. Perry | 61 | Wife | — | Tennessee |
| 69 | Ida Perry | 37 | Daughter | Clerk | New York |
| 70 | Bernice Simmons | 40 | Daughter | — | New York |
| 71 | La Donna Simmons | 17 | Daughter | — | Indiana |
| 72 | Lucille Denham | 31 | Niece | Clerk | Minnesota |
| 73 | Oran K. Bentley | 52 | Head | Freight Conductor | Indiana |
| 74 | Ethel Bentley | 49 | Wife | — | Indiana |
| 75 | Cora Rhoades | 67 | Head | — | Indiana |
| 76 | Gertrude Rhoades | 36 | Daughter | Librarian | Indiana |
| 77 | Enos Sunderman | 52 | Head | Locomotive Engineer | Indiana |
| 78 | Lucille Sunderman | 43 | Wife | Teacher | Indiana |
| 79 | Raymond Moss | 30 | Head | Dry Cleaner | Indiana |
| 80 | La Veda Moss | 24 | Wife | — | Indiana |
Pedigree Summary
Ruth + 2 siblings
Gen 1 · 4 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)