OJ
Olga Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Worcester-County, Massachusetts
Our Model Tree links this Olga Johnson across the 1900, 1910, 1920, 1930 and 1940 US Censuses in Worcester-County, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1874), then head of a 3-person household.
Age 66
b. ~1874
Female
Head
Born: Sweden
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Worcester-County, Massachusetts |
| Surname | Johnson |
| Given Name | Olga |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 66 |
| Marital Status | Widowed |
| Birthplace | Sweden |
| 1935 Residence (City) | Fitchburg |
| 1935 Residence (County) | Worcester |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | G 1 |
| 1935 Residence | Same House |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
| Township / Ward | Fitchburg |
| Est. Birth Year | ~1874 |
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 Olga | Age | Birth yr |
|---|---|---|---|---|
| Evelyn Johnson | Daughter | — | 38 | ~1902 |
| Olga Johnson | Head | — | 66 | ~1874 |
| Russell Johnson | Son | — | 19 | ~1921 |
Census Appearances
1900
Worcester, Massachusetts
Spouse, age 29
Worcester, Massachusetts · implied b. ~1871 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Olga K. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Sweden |
| Birth Month | Jan |
| Birth Year | 1871 |
| Year of Immigration | 1891 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
1910
Worcester, Massachusetts
Spouse, age 35
Worcester, Massachusetts · implied b. ~1875 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Otalia |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Sweden |
| Years Married | 11 |
| Children Born | 5 |
| Children Living | 5 |
| Year of Immigration | 1890 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
1920
Worcester, Massachusetts
Spouse, age 46
Worcester, Massachusetts · implied b. ~1874 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Ophelia |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Sweden |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Home Owned/Rented | 1893 |
| Birth Country | Sweden |
| Year of Naturalization | 1889 |
| Birthplace (normalized) | sweden |
1930
Worcester, Massachusetts
Other, age 56
Worcester, Massachusetts · implied b. ~1874 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Olga R. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | Sweden |
| Naturalization Status | Naturalized |
| Year of Immigration | 1891 |
| Age at First Marriage | 18 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read/Write | Yes |
| Mother Tongue | Swedish |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
1940
Worcester-County, Massachusetts
Head, age 66
Worcester-County, Massachusetts · implied b. ~1874 — 3 household members
| Surname | Johnson |
| Given Name | Olga |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 66 |
| Marital Status | Widowed |
| Birthplace | Sweden |
| 1935 Residence (City) | Fitchburg |
| 1935 Residence (County) | Worcester |
| Naturalization Status | Naturalized |
| Highest Grade | G 1 |
| 1935 Residence | Same House |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
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 Olga Johnson across 5 US Census years (1900, 1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Olga Johnson
Head · 1940 · age 66 · b. ~1874 · Massachusetts
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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 — Worcester-County, Massachusetts
Open full size
1940 US Federal Census — Worcester-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01648-00032)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Martin Luoma | None | Martha | — | — |
| 2 | Luoma | None | Marion | — | — |
| 3 | Lewis Fletcher | 28 | Head | Bookkeeping | Mass |
| 4 | Arline Fletcher | 28 | Wife | — | Mass |
| 5 | Lewis Fletcher | 6 | Son | — | Mass |
| 6 | Olga Johnson THIS PERSON | 66 | Head | — | Sweden |
| 7 | Evelyn Johnson | 38 | Daughter | Clerk | Mass |
| 8 | Russell Johnson | 19 | Son | Laboratory | Mass |
| 9 | Wilho Maki | 29 | Head | Salesman | Mass |
| 10 | Anne Maki | 29 | Wife | — | Mass |
| 11 | Elaine Maki | 5 | Daughter | — | Mass |
| 12 | Richard Maki | 0 | Son | — | Mass |
| 13 | — | None | — | — | — |
| 14 | — | None | — | — | — |
| 15 | — | None | — | — | — |
| 16 | — | None | — | — | — |
| 17 | — | None | — | — | — |
| 18 | — | None | — | — | — |
| 19 | John Stephens | 55 | Head | — | Finland |
| 20 | Ida Stephens | 58 | Wife | — | Finland |
| 21 | Ernest Tokes | 48 | Head | Mechanist | Finland |
| 22 | Pauline Tokes | 50 | Wife | — | Finland |
| 23 | Rudolph Tokes | 25 | Son | — | Mass |
| 24 | Veikko Tokes | 22 | Son | Mechanist | Mass |
| 25 | Oliva Tokes | 24 | Head | Scrapper | Mass |
| 26 | Evelyn Tokes | 23 | Wife | — | Mass |
| 27 | Sally Tokes | 3 | Daughter | — | Mass |
| 28 | Anton Lamminen | 56 | Head | Machine Saw | Finland |
| 29 | Anni Lamminen | 53 | Wife | — | Finland |
| 30 | Gertrude Lamminen | 15 | Daughter | — | Mass |
| 31 | Mikko Surs | 58 | Head | Janitor | Finland |
| 32 | Amada Surs | 54 | Wife | — | Finland |
| 33 | Toini Surs | 27 | Daughter | Waitress | Mass |
| 34 | Reino Surs | 26 | Son | Shipper | Mass |
| 35 | Carl Hall | 29 | Head | Nickel Plater | Georgia |
| 36 | Aino Hall | 26 | Wife | — | Mass |
| 37 | Carleen Hall | 6 | Daughter | — | Ohio |
| 38 | Fay Hall | 3 | Daughter | — | Mass |
| 39 | Eero Edwin Kallio | 18 | Lodger | Odd Jobs | Mass |
| 40 | Charles Slobag | 58 | Head | Machinist | Finland |
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)