MO
Mary Olsen — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Philadelphia, Pennsylvania
Our Model Tree links this Mary Olsen across the 1920 and 1930 US Censuses in Philadelphia, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1905), then head of a 6-person household.
Age 15
b. ~1905
Female
Daughter
Born: Pennsylvania
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Philadelphia, Pennsylvania |
| Surname | Olsen |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Denmark |
| Mother's Birthplace | England |
| Additional Details | |
| Occupation | Sorter |
| Industry | Pocketbook Factory |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Sorter |
| Township / Ward | City Of Philadelphia |
| Est. Birth Year | ~1905 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Olsen | Daughter | — | 15 | ~1905 |
| Harriet Olsen | Daughter | — | 17 | ~1903 |
| Lillian Olsen | Daughter | — | 9 | ~1911 |
| Sarah Olsen | Daughter | — | 18 | ~1902 |
| Lawrence Olsen | Head | — | 45 | ~1875 |
| Lawrence Olsen | Son | — | 14 | ~1906 |
Census Appearances
1920
Philadelphia, Pennsylvania
Daughter, age 15
Philadelphia, Pennsylvania · implied b. ~1905 — 6 household members
| Surname | Olsen |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Denmark |
| Mother's Birthplace | England |
| Occupation | Sorter |
| Industry | Pocketbook Factory |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Philadelphia, Pennsylvania
Daughter, age 25
Philadelphia, Pennsylvania · implied b. ~1905 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olsen |
| Given Name | May |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Denmark |
| Mother's Birthplace | England |
| Occupation | Operator |
| Industry | Telephone |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 (1920 and 1930) in Philadelphia, Pennsylvania, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Olsen
Daughter · 1920 · age 15 · b. ~1905 · Pennsylvania
★ You are viewing this record
Sibling
Lawrence Olsen
Sibling · 1920 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lillian Olsen
Sibling · 1920 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sarah Olsen
Sibling · 1920 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harriet Olsen
Sibling · 1920 · age 17
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 — Philadelphia, Pennsylvania
Open full size
1920 US Federal Census — Philadelphia, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu1626unit:0703)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Florence | 11 | Daughter | — | Pennsylvania |
| 52 | Frank Ryder | 28 | Head | Produce | England |
| 53 | Florence Ryder | 26 | Wife | — | England |
| 54 | Alfred Ryder | 8 | Son | — | Pennsylvania |
| 55 | Dorothy Ryder | 1 | Daughter | — | Pennsylvania |
| 56 | Isaac Abrams | 36 | Head | Weaver | Russia |
| 57 | Mattie Abrams | 33 | Wife | — | Russia |
| 58 | Lenore Abrams | 13 | Son | — | Pennsylvania |
| 59 | Fred Milsky | 37 | Head | Machinist | Russia |
| 60 | Ida Milsky | 32 | Wife | — | Russia |
| 61 | Isadore Milsky | 11 | Son | — | Pennsylvania |
| 62 | Emma Milsky | 10 | Daughter | — | Pennsylvania |
| 63 | Harry Milsky | 7 | Son | — | Pennsylvania |
| 64 | Adolph Milsky | 5 | Son | — | Pennsylvania |
| 65 | Herbert Milsky | 2 | Son | — | Pennsylvania |
| 66 | Harry Milsky | 30 | Boarder | Machinist | Russia |
| 67 | William Milsky | 35 | Boarder | Laborer | Russia |
| 68 | William Foster | 40 | Head | Fireman | Pennsylvania |
| 69 | Minnie Foster | 30 | Wife | — | Pennsylvania |
| 70 | Dorothy Foster | 11 | Daughter | — | Pennsylvania |
| 71 | William Foster | 7 | Son | — | Pennsylvania |
| 72 | Florence Foster | 5 | Daughter | — | Pennsylvania |
| 73 | Margaret Foster | 3 | Daughter | — | Pennsylvania |
| 74 | Emily Young | 16 | Boarder | Winder | Pennsylvania |
| 75 | Lawrence Olsen | 45 | Head | Machinist | Denmark |
| 76 | Sarah Olsen | 18 | Daughter | Needle Mkr | Pennsylvania |
| 77 | Harriet Olsen | 17 | Daughter | — | Pennsylvania |
| 78 | Mary Olsen THIS PERSON | 15 | Daughter | Sorter | Pennsylvania |
| 79 | Lawrence Olsen | 14 | Son | — | Pennsylvania |
| 80 | Lillian Olsen | 9 | Daughter | — | Pennsylvania |
| 81 | Elias Nelson | 35 | Head | Fireman | Norway |
| 82 | Amelia Nelson | 37 | Wife | — | Norway |
| 83 | Bertha Nelson | 6 | Daughter | — | Pennsylvania |
| 84 | Regina Nelson | 4 | Daughter | — | Pennsylvania |
| 85 | Alexander Hunter | 32 | Head | Contractor | Pennsylvania |
| 86 | Harry Hunter | 35 | Brother | Contractor | Pennsylvania |
| 87 | Robert Hunter | 24 | Brother | Printer | Pennsylvania |
| 88 | Elizabeth Hunter | 40 | Sister | Weaver | Pennsylvania |
| 89 | Elizabeth Hunter | 61 | Mother | — | Pennsylvania |
| 90 | John Dick | 28 | Head | Spinner | Pennsylvania |
| 91 | Ella Dick | 23 | Wife | — | Pennsylvania |
| 92 | Robert Dick | 5 | Son | — | Pennsylvania |
| 93 | Gustav Anderson | 35 | Head | Engineer | Sweden |
| 94 | Alana Anderson | 32 | Wife | — | Finland |
| 95 | Anita Anderson | 10 | Daughter | — | New York |
| 96 | Teresa Anderson | 4 | Daughter | — | Massachusetts |
| 97 | Thelma Anderson | 2 | Daughter | — | Florida |
| 98 | William R Nagle | 42 | Head | Officer | Pennsylvania |
| 99 | Annie Nagle | 42 | Wife | — | Pennsylvania |
| 100 | Harry Nagle | 15 | Son | Winder | Pennsylvania |
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)