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Joseph Kowalski — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Mercer, New Jersey
Our Model Tree links this Joseph Kowalski across the 1910 and 1920 US Censuses in Mercer, New Jersey (XGBoost, ~Confirmed) — first a son (b.~1906), then head of a 8-person household.
Age 14
b. ~1906
Male
Son
Born: Pennsylvania
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Mercer, New Jersey |
| Surname | Kowalski |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Additional Details | |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Trenton City |
| Est. Birth Year | ~1906 |
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.
8 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Joseph | Age | Birth yr |
|---|---|---|---|---|
| Joseph Kowalski | Head | — | 34 | ~1886 |
| Stanley Kowalski | Son | — | 1 | ~1919 |
| Helen Kowalski | Daughter | — | 8 | ~1912 |
| Mary Kowalski | Daughter | — | 12 | ~1908 |
| Stella Kowalski | Spouse | — | 30 | ~1890 |
| Joseph Kowalski | Son | — | 14 | ~1906 |
| Annie Kowalski | Daughter | — | 5 | ~1915 |
| John Kowalski | Son | — | 3 | ~1917 |
Census Appearances
1910
Lackawanna, New …
Son, age 5
Lackawanna, New Jersey · implied b. ~1905 — 47 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalski |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1920
Mercer, New …
Son, age 14
Mercer, New Jersey · implied b. ~1906 — 8 household members
| Surname | Kowalski |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | 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 Joseph Kowalski across 2 US Census years (1910 and 1920) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Joseph Kowalski
Son · 1920 · age 14 · b. ~1906 · New Jersey
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Sibling
Stanley Kowalski
Sibling · 1920 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Annie Kowalski
Sibling · 1920 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Kowalski
Sibling · 1920 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Kowalski
Sibling · 1920 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Kowalski
Sibling · 1920 · age 3
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 — Mercer, New Jersey
Open full size
1920 US Federal Census — Mercer, New Jersey
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu1054unit:0264)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | John Kowalski | 23 | Head | None | New Jersey |
| 52 | Mary Kowalski | 21 | Wife | None | New Jersey |
| 53 | John Jr Kowalski | 0 | Son | None | New Jersey |
| 54 | Joseph Kowalski | 34 | Head | Laborer | Poland |
| 55 | Stella Kowalski | 30 | Wife | None | Poland |
| 56 | Joseph Kowalski THIS PERSON | 14 | Son | None | Pennsylvania |
| 57 | Mary Kowalski | 12 | Daughter | None | Pennsylvania |
| 58 | Helen Kowalski | 8 | Daughter | None | Pennsylvania |
| 59 | Annie Kowalski | 5 | Daughter | None | Pennsylvania |
| 60 | John Kowalski | 3 | Son | None | Pennsylvania |
| 61 | Stanley Kowalski | 1 | Son | None | Pennsylvania |
| 62 | Frank Kowalski | 24 | Head | Laborer | Poland |
| 63 | Mary Kowalski | 21 | Wife | Laborer | Poland |
| 64 | Joseph Kowalski | 37 | Head | Molder | Slovakia |
| 65 | Mary Kowalski | 27 | Wife | None | Slovakia |
| 66 | Joseph Kowalski | 14 | Son | None | Pennsylvania |
| 67 | Mary Kowalski | 12 | Daughter | None | Pennsylvania |
| 68 | Annie Kowalski | 7 | Daughter | None | Pennsylvania |
| 69 | Helen Kowalski | 5 | Daughter | None | Pennsylvania |
| 70 | John Kowalski | 4 | Son | None | New Jersey |
| 71 | Frank Kowalski | 2 | Son | None | New Jersey |
| 72 | Stanley Kowalski | 1 | Son | None | New Jersey |
| 73 | John Kowalski | 40 | Head | Cabinet Maker | Poland |
| 74 | Mary Kowalski | 43 | Wife | None | Poland |
| 75 | John Kowalski | 20 | Son | Laborer | New Jersey |
| 76 | Joseph Kowalski | 15 | Son | Repairman | New Jersey |
| 77 | Mary Kowalski | 12 | Daughter | None | New Jersey |
| 78 | Helen Kowalski | 10 | Daughter | None | New Jersey |
| 79 | Frank Kowalski | 7 | Son | None | New Jersey |
| 80 | Stanley Kowalski | 1 | Son | None | New Jersey |
| 81 | Joseph Kowalski | 49 | Head | None | Slovakia |
| 82 | Mary Kowalski | 40 | Wife | None | Slovakia |
| 83 | Joseph Kowalski | 21 | Son | Machinist | New Jersey |
| 84 | John Kowalski | 19 | Son | Machinist | New Jersey |
| 85 | Mary Kowalski | 15 | Daughter | Caster | New Jersey |
| 86 | Helen Kowalski | 14 | Daughter | None | New Jersey |
| 87 | Frank Kowalski | 37 | Head | Fire Drawer | Slovakia |
| 88 | Mary Kowalski | 34 | Wife | None | Slovakia |
| 89 | Frank Kowalski | 15 | Son | None | Slovakia |
| 90 | Mary Kowalski | 12 | Daughter | None | New Jersey |
| 91 | John Kowalski | 10 | Son | None | New Jersey |
| 92 | Helen Kowalski | 1 | Daughter | None | New Jersey |
| 93 | Joseph Kowalski | 35 | Head | Laborer | Slovakia |
| 94 | Mary Kowalski | 30 | Wife | None | Slovakia |
| 95 | Joseph Kowalski | 13 | Son | None | New Jersey |
| 96 | Mary Kowalski | 11 | Daughter | None | New Jersey |
| 97 | John Kowalski | 5 | Son | None | New Jersey |
| 98 | Frank Kowalski | 54 | Head | Laborer | Poland |
| 99 | Mary Kowalski | 47 | Wife | None | Poland |
| 100 | John Kowalski | 23 | Son | Fire Drawer | New Jersey |
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)