MO
Mary Olsen — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Queens-County, New York
Our Model Tree links this Mary Olsen across the 1930 and 1940 US Censuses in Queens-County, New York (XGBoost, ~Confirmed) — first a daughter (b.~1926), then head of a 6-person household.
Age 14
b. ~1926
Female
Daughter
Born: New York
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Queens-County, New York |
| Surname | Olsen |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | New York |
| 1935 Residence (County) | Queens |
| Additional Details | |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Township / Ward | New York |
| Est. Birth Year | ~1926 |
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 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Olsen | Daughter | — | 14 | ~1926 |
| Charles Olsen | Son | — | 7 | ~1933 |
| Ludwick Olsen | Head | — | 40 | ~1900 |
| Rolf Olsen | Son | — | 2 | ~1938 |
| Bessie Olsen | Spouse | — | 35 | ~1905 |
| Agnes Olsen | Daughter | — | 15 | ~1925 |
Census Appearances
1930
New York, …
Daughter, age 4
New York, New York · implied b. ~1926 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olsen |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | New York |
| Age at First Marriage | No |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Queens-County, New …
Daughter, age 14
Queens-County, New York · implied b. ~1926 — 6 household members
| Surname | Olsen |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | New York |
| 1935 Residence (County) | Queens |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
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 Mary Olsen across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Olsen
Daughter · 1940 · age 14 · b. ~1926 · New York
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Sibling
Rolf Olsen
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Olsen
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Agnes Olsen
Sibling · 1940 · age 15
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 — Queens-County, New York
Open full size
1940 US Federal Census — Queens-County, New York
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-02752-00018)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Emilie Ridge | 62 | Wife | — | New York |
| 2 | Dorothy A Ridge | 36 | Daughter | Secretary | New York |
| 3 | John Catalan | 50 | Lodger | Salesman | New York |
| 4 | Raymond Medler | 42 | Head | Med Doctor | New York |
| 5 | Mary J Medler | 41 | Wife | — | New York |
| 6 | Raymond Medler | 10 | Son | — | New York |
| 7 | Mary Medler | 8 | Daughter | — | New York |
| 8 | Donald Medler | 5 | Son | — | New York |
| 9 | Maxine Zangow | 25 | House Keeper | Housekeeper | Nebraska |
| 10 | Adolf T Lorenzen | 42 | Head | Store Mgr | Germany |
| 11 | Alma E Lorenzen | 39 | Wife | — | Germany |
| 12 | Herbert Lorenzen | 13 | Son | — | Germany |
| 13 | Henry J Beermann | 64 | Head | — | Germany |
| 14 | Margaret Beermann | 64 | Wife | — | Germany |
| 15 | Ludwick Olsen | 40 | Head | Roofer | Norway |
| 16 | Bessie Olsen | 35 | Wife | — | Pennsylvania |
| 17 | Agnes E Olsen | 15 | Daughter | — | New York |
| 18 | Mary E Olsen THIS PERSON | 14 | Daughter | — | New York |
| 19 | Charles Olsen | 7 | Son | — | New York |
| 20 | Rolf R Olsen | 2 | Son | — | New York |
| 21 | Edward Larkin | 55 | Head | Doorman | New York |
| 22 | Loretta C Larkin | 46 | Wife | Cleaner | New York |
| 23 | George Larkin | 22 | Son | Presser | New York |
| 24 | William Larkin | 20 | Son | Helper | New York |
| 25 | Edward Larkin | 26 | Son | File Clerk | New York |
| 26 | June Larkin | 23 | Daughter in law | — | Boston |
| 27 | Robert Larkin | 0 | Grandson | — | New York |
| 28 | Frank Wiberg | 53 | Head | Manager | Sweden |
| 29 | Gerda V Wiberg | 51 | Wife | Manager | Sweden |
| 30 | Vincent S Wiberg | 27 | Son | Bartender | Sweden |
| 31 | William Pershback | 48 | Lodger | — | New York |
| 32 | Harry Bunning | 47 | Lodger | Iron Worker | New York |
| 33 | Harry Doyle | 55 | Lodger | Care Taker | New York |
| 34 | Harry Eabert | 37 | Lodger | Porter | New York |
| 35 | Raymond Owens | 54 | Lodger | Theatre Mgr | New York |
| 36 | Robert Caccavale | 44 | Lodger | Bricklayer | Italy |
| 37 | Eugene Flondreau | 38 | Lodger | Truck Driver | New York |
| 38 | Theresa Riedel | 63 | Head | — | Germany |
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)