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Oscar Larson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Oscar Larson across the 1900, 1910, 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1874), then head of a 4-person household.
Age 66
b. ~1874
Male
Head
Born: Sweden
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Larson |
| Given Name | Oscar |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 66 |
| Marital Status | Married |
| Birthplace | Sweden |
| 1935 Residence (City) | Everett |
| 1935 Residence (County) | Middlesex |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Sheet metal worker |
| Industry | Metal factory |
| Class of Worker | PW |
| Hours Worked | 26 |
| Income (1939) | 1000 |
| Highest Grade | No 8 |
| 1935 Residence | Massachusetts |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
| Occupation | Sheet Metal Worker |
| Township / Ward | Malden City |
| 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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Oscar | Age | Birth yr |
|---|---|---|---|---|
| Oscar Larson | Head | — | 66 | ~1874 |
| Ada Larson | Spouse | — | 53 | ~1887 |
| Edward Larson | Son | — | 26 | ~1914 |
| Carl Larson | Son | — | 32 | ~1908 |
Census Appearances
1900
Middlesex, Massachusetts
Head, age 30
Middlesex, Massachusetts · implied b. ~1870 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larson |
| Given Name | Oscar |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Sweden |
| Birth Month | Nov |
| Birth Year | 1870 |
| Year of Immigration | 1887 |
| Naturalization Status | Alien |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Laborer Leather Board Mill |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
1910
Middlesex, Massachusetts
Head, age 38
Middlesex, Massachusetts · implied b. ~1872 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larson |
| Given Name | Oscar |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Sweden |
| Years Married | 14 |
| Year of Immigration | 1893 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Yarn Weigher |
| Industry | Woolen Mill |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
1920
Middlesex, Massachusetts
Head, age 46
Middlesex, Massachusetts · implied b. ~1874 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larson |
| Given Name | Oscar |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Sweden |
| Year of Immigration | 1889 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Laborer |
| Industry | Tin Smith Co |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Home Owned/Rented | R |
| Birth Country | Sweden |
| Year of Naturalization | 1895 |
| Birthplace (normalized) | sweden |
1930
Middlesex, Massachusetts
Head, age 57
Middlesex, Massachusetts · implied b. ~1873 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larson |
| Given Name | Oscar S. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 57 |
| Marital Status | Married |
| Birthplace | Sweden |
| Naturalization Status | Naturalized |
| Year of Immigration | 1886 |
| Age at First Marriage | 21 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Foreman |
| Industry | Car factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Swedish |
| Home Owned/Rented | O |
| Home Value / Rent | 5500 |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
1940
Middlesex-County, Massachusetts
Head, age 66
Middlesex-County, Massachusetts · implied b. ~1874 — 4 household members
| Surname | Larson |
| Given Name | Oscar |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 66 |
| Marital Status | Married |
| Birthplace | Sweden |
| 1935 Residence (City) | Everett |
| 1935 Residence (County) | Middlesex |
| Naturalization Status | Naturalized |
| Occupation | Sheet metal worker |
| Industry | Metal factory |
| Class of Worker | PW |
| Hours Worked | 26 |
| Income (1939) | 1000 |
| Highest Grade | No 8 |
| 1935 Residence | Massachusetts |
| 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 Oscar Larson across 5 US Census years (1900, 1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Oscar Larson
Head · 1940 · age 66 · b. ~1874 · Massachusetts
★ 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 — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01608-00358)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Thomas Frain | 65 | Head | Laster | Ireland |
| 2 | Bridget Frain | 63 | Wife | — | Ireland |
| 3 | Albert J Frain | 27 | Son | Sail Maker | Massachusetts |
| 4 | Winifred Frain | 22 | Daughter | Wrapper | Massachusetts |
| 5 | Peter D Durney | 35 | Head | Stationary Fireman | Massachusetts |
| 6 | Eleanor Durney | 36 | Wife | — | New Ireland |
| 7 | Mary E Durney | 5 | Daughter | — | Massachusetts |
| 8 | Philip Durney | 30 | Brother | Stationary Fireman | New Ireland |
| 9 | Francis Noonan | 57 | Head | Salesman | Massachusetts |
| 10 | Florence Noonan | 50 | Wife | — | Massachusetts |
| 11 | Francis J Noonan | 15 | Son | — | Massachusetts |
| 12 | James G Noonan | 12 | Son | — | Massachusetts |
| 13 | Margaret Noonan | 6 | Daughter | — | Massachusetts |
| 14 | Angelino Moreno | 42 | Head | Barber | Italy |
| 15 | Bertha Moreno | 40 | Wife | — | New York |
| 16 | Mary Moreno | 17 | Daughter | New Worker | Massachusetts |
| 17 | Anthony Moreno | 17 | Son | — | Massachusetts |
| 18 | Dorothy Moreno | 16 | Daughter | New Worker | Massachusetts |
| 19 | Loretta Moreno | 15 | Daughter | — | Massachusetts |
| 20 | Angelo Moreno | 12 | Son | — | Massachusetts |
| 21 | Eugene Moreno | 10 | Son | — | Massachusetts |
| 22 | Quino Zucchero | 62 | Father-in-law | — | Italy |
| 23 | Marie Zucchero | 66 | Mother-in-law | — | Italy |
| 24 | Themistocles Shea | 43 | Head | Store Manager | Italy |
| 25 | Rose Shea | 38 | Wife | — | Massachusetts |
| 26 | William C Shea | 15 | Son | — | Massachusetts |
| 27 | Herbert L Shea | 7 | Son | — | Massachusetts |
| 28 | Bridget Burke | 74 | Head | — | New Ireland |
| 29 | George W Burke | 48 | Son | Fireman | Massachusetts |
| 30 | Mary A Burke | 34 | Daughter-in-law | School Teacher | Massachusetts |
| 31 | — | None | — | — | — |
| 32 | Oscar Larson THIS PERSON | 66 | Head | Sheet Metal Worker | Sweden |
| 33 | Ada S Larson | 53 | Wife | — | Sweden |
| 34 | Carl Larson | 32 | Son | Glazier | Massachusetts |
| 35 | Edward Larson | 26 | Son | Sheet Metal Worker | Massachusetts |
| 36 | Cutter Foster | 60 | Head | Laborer | Massachusetts |
| 37 | Catherine Foster | 57 | Wife | — | Ireland Free State |
| 38 | John J Roche | 67 | Head | — | Ireland Free State |
| 39 | Nellie Roche | 57 | Wife | — | England |
| 40 | John J Roche | 24 | Son | Woolen Mill | Massachusetts |
Related Census Records
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)