MP
Mary Pierce — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Phila, Pennsylvania
Our Model Tree links this Mary Pierce across the 1920, 1930 and 1940 US Censuses in Phila, Pennsylvania (XGBoost, ~Confirmed) — first a spouse (b.~1874), then head of a 4-person household.
Age 46
b. ~1874
Female
Spouse
Born: Delaware
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Phila, Pennsylvania |
| Surname | Pierce |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 46 |
| Marital Status | Single |
| Birthplace | Delaware |
| Father's Birthplace | Delaware |
| Mother's Birthplace | Delaware |
| Additional Details | |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
| Township / Ward | City Of Phila |
| 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 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Philip Pierce | Head | — | 52 | ~1868 |
| Walter Pierce | Son | — | 7 | ~1913 |
| Mae Pierce | Spouse | — | 42 | ~1878 |
| Mary Pierce | Spouse | — | 46 | ~1874 |
Census Appearances
1920
Phila, Pennsylvania
Spouse, age 46
Phila, Pennsylvania · implied b. ~1874 — 4 household members
| Surname | Pierce |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 46 |
| Marital Status | Single |
| Birthplace | Delaware |
| Father's Birthplace | Delaware |
| Mother's Birthplace | Delaware |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
1930
Lehigh, Pennsylvania
Spouse, age 56
Lehigh, Pennsylvania · implied b. ~1874 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Pierce |
| Given Name | Martha |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | Delaware |
| Father's Birthplace | Delaware |
| Mother's Birthplace | Delaware |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
1940
Lehigh-County, Pennsylvania
Spouse, age 66
Lehigh-County, Pennsylvania · implied b. ~1874 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Pierce |
| Given Name | Martha |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 66 |
| Marital Status | Married |
| Birthplace | Delaware |
| 1935 Residence (City) | Allentown City |
| 1935 Residence (County) | Lehigh |
| Class of Worker | 0 |
| Highest Grade | No 2 |
| 1935 Residence | Same place |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
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 Pierce across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Pierce
Spouse · 1920 · age 46 · b. ~1874 · Pennsylvania
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1920 US Federal Census — Phila, Pennsylvania
Open full size
1920 US Federal Census — Phila, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu1642unit:0548)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Harry Arking | 50 | Head | Salesman | Penna |
| 2 | Anna Arking | 42 | Wife | None | Penna |
| 3 | Edith Arking | 18 | Daughter | None | Penna |
| 4 | Charles Roberts | 64 | Head | Cashier | Delaware |
| 5 | Mae Roberts | 62 | Wife | None | Penna |
| 6 | Ethel M. Roberts | 38 | Daughter | Manager | Penna |
| 7 | Thomas O. Harris | 58 | Head | Adjuster | Penna |
| 8 | Emily Harris | 52 | Wife | Stenoglady | Penna |
| 9 | Francis Sturgis | 66 | Head | Clerk | Penna |
| 10 | Catherine Sturgis | 55 | Wife | None | Penna |
| 11 | James Sturgis | 25 | Son | Assistant | Penna |
| 12 | John Sturgis | 23 | Son | Bookkeeper | Penna |
| 13 | Gertrude Sturgis | 20 | Daughter | Stenographer | Penna |
| 14 | Rita Sturgis | 18 | Daughter | Stenographer | Penna |
| 15 | Mary Mehaffey | 50 | Head | None | Penna |
| 16 | Grace Mehaffey | 19 | Daughter | — | New Jersey |
| 17 | Anne Mehaffey | 17 | Daughter | — | New Jersey |
| 18 | Elizabeth Mehaffey | 22 | Daughter | Secy | New Jersey |
| 19 | Hugh Mehaffey | 21 | Son | Clerk | New Jersey |
| 20 | James Mehaffey | 24 | Son | Clerk | New Jersey |
| 21 | Philip Pierce | 52 | Head | Clerk | Maryland |
| 22 | Mary Pierce THIS PERSON | 46 | Wife | None | Delaware |
| 23 | Walter Pierce | 7 | Son | — | Maryland |
| 24 | Mae Pierce | 42 | Wife | Saleswoman | Penna |
| 25 | James Tihow | 55 | Head | Clerk | New Jersey |
| 26 | Catherine Tihow | 48 | Wife | None | Penna |
| 27 | Grace Tihow | 19 | Daughter | Clerk | Penna |
| 28 | Michael O'Neil | 59 | Head | None | Ireland |
| 29 | Anna O'Neil | 55 | Daughter | Teacher | Ireland |
| 30 | Josephine O'Neil | 52 | Daughter | Teacher | Penna |
| 31 | Frank Strickland | 60 | Head | Clerk | Penna |
| 32 | Elizabeth Strickland | 50 | Wife | None | Penna |
| 33 | Harold Strickland | 21 | Son | Contractor | Penna |
| 34 | Catherine Strickland | 12 | Daughter | — | Penna |
| 35 | Peter Locke | 50 | Head | Painter | Penna |
| 36 | Eva M. Locke | 48 | Wife | None | Penna |
| 37 | John Locke | 26 | Son | Painter | Penna |
| 38 | Albert Locke | 24 | Son | Painter | Penna |
| 39 | Walter Locke | 21 | Son | Draftsman | Penna |
| 40 | William Locke | 18 | Son | Machinist | Penna |
| 41 | David Locke | 11 | Son | — | Penna |
| 42 | Eva M. Locke | 10 | Daughter | — | Penna |
| 43 | John Dawson | 62 | Head | Stone Mason | Scotland |
| 44 | Ludovickina Dawson | 54 | Wife | None | Scotland |
| 45 | James Dawson | 28 | Son | — | Penna |
| 46 | Alexander Dawson | 26 | Son | Machinist | Penna |
| 47 | John Jr. Dawson | 23 | Son | Machinist | Penna |
| 48 | Isabel Dawson | 21 | Daughter | Bookkeeper | Penna |
| 49 | Charles Dawson | 18 | Son | Salesman | Penna |
| 50 | Florence Dawson | 14 | Daughter | — | Penna |
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)