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Mary Kowalski — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Erie, Pennsylvania
Our Model Tree links this Mary Kowalski across the 1920 and 1930 US Censuses in Erie, Pennsylvania (XGBoost, ~Confirmed) — first a spouse (b.~1892), then head of a 9-person household.
Age 38
b. ~1892
Female
Spouse
Born: Pennsylvania
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Erie, Pennsylvania |
| Surname | Kowalski |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 17 |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Erie City |
| Est. Birth Year | ~1892 |
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.
9 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Stanley Kowalski | Son | — | 2 | ~1928 |
| Florence Kowalski | Daughter | — | 13 | ~1917 |
| Cecelia Kowalski | Daughter | — | 16 | ~1914 |
| Joseph Kowalski | Son | — | 14 | ~1916 |
| Harry Kowalski | Son | — | 18 | ~1912 |
| Alex Kowalski | Head | — | 58 | ~1872 |
| Leonard Kowalski | Son | — | 3 | ~1927 |
| Frank Kowalski | Son | — | 21 | ~1909 |
| Mary Kowalski | Spouse | — | 38 | ~1892 |
Census Appearances
1920
Erie, Pennsylvania
Spouse, age 28
Erie, Pennsylvania · implied b. ~1892 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalski |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Father's Birthplace | Russian Poland |
| Mother's Birthplace | Russian Poland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Polish |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Erie, Pennsylvania
Spouse, age 38
Erie, Pennsylvania · implied b. ~1892 — 9 household members
| Surname | Kowalski |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 17 |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| 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 Kowalski across 2 US Census years (1920 and 1930) in Erie, Pennsylvania, using XGBoost record linkage.
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This person
Anchor record
Mary Kowalski
Spouse · 1930 · age 38 · b. ~1892 · Pennsylvania
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Erie, Pennsylvania
Open full size
1930 US Federal Census — Erie, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1930:fifteenthcensus00reel2036:0111)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Ignatz Hajnowski | 57 | Head | Laborer | Poland |
| 52 | Pearl Hajnowski | 55 | Wife | — | Poland |
| 53 | Harriett Hajnowski | 23 | Daughter | — | Pennsylvania |
| 54 | Alois Pitkowski | 26 | Head | Laborer | Pennsylvania |
| 55 | Regina Pitkowski | 21 | Wife | Laborer | Pennsylvania |
| 56 | Miriam Pitkowski | 3 | Daughter | — | Pennsylvania |
| 57 | Lenrod Pitkowski | 2 | Son | — | Pennsylvania |
| 58 | John Tomczak | 51 | Head | Repair Man | Russia Pol |
| 59 | Mary Tomczak | 48 | Wife | — | Pennsylvania |
| 60 | Sophia Lukezewski | 17 | Daughter | — | Pennsylvania |
| 61 | Louis Lukezewski | 19 | Son-in-law | Laborer | Pennsylvania |
| 62 | Theresa Lukezewski | 1 | Granddaughter | — | Pennsylvania |
| 63 | Frank Tomczak | 14 | Son | — | Pennsylvania |
| 64 | John Rutega | 63 | Head | Watchman | Germany |
| 65 | Victoria Rutega | 61 | Wife | — | Germany |
| 66 | Anna Rutega | 25 | Daughter | Laborer | Pennsylvania |
| 67 | Harry Rutega | 17 | Son | — | Pennsylvania |
| 68 | Charles Rutega | 28 | Head | Care Taker | Pennsylvania |
| 69 | Mary Rutega | 25 | Wife | — | Pennsylvania |
| 70 | Jean Rutega | 5 | Daughter | — | Pennsylvania |
| 71 | Robert Rutega | 3 | Son | — | Pennsylvania |
| 72 | Mary Donikowski | 41 | Head | — | Pennsylvania |
| 73 | Charles Donikowski | 19 | Son | Laborer | Pennsylvania |
| 74 | Regina Donikowski | 16 | Daughter | Laborer | Pennsylvania |
| 75 | Lottie Donikowski | 15 | Son | — | Pennsylvania |
| 76 | Joseph Janczewski | 63 | Father | Labor | Germany |
| 77 | Frances Janczewski | 63 | Mother | — | Germany |
| 78 | Alex Kowalski | 58 | Head | Laborer | Poland |
| 79 | Mary Kowalski THIS PERSON | 38 | Wife | — | Pennsylvania |
| 80 | Frank Kowalski | 21 | Son | Laborer | Pennsylvania |
| 81 | Harry Kowalski | 18 | Son | — | Pennsylvania |
| 82 | Cecelia Kowalski | 16 | Daughter | — | Pennsylvania |
| 83 | Joseph Kowalski | 14 | Son | — | Pennsylvania |
| 84 | Florence Kowalski | 13 | Daughter | — | Pennsylvania |
| 85 | Leonard Kowalski | 3 | Son | — | Pennsylvania |
| 86 | Stanley Kowalski | 2 | Son | — | Pennsylvania |
| 87 | Stanley Bielinski | 26 | Head | Labor | New York |
| 88 | Jane Bielinski | 22 | Wife | — | Poland |
| 89 | Robert Bielinski | 3 | Son | — | Pennsylvania |
| 90 | Julian Jankowski | 45 | Head | Molder | Poland |
| 91 | Eleanor Jankowski | 33 | Wife | — | Poland |
| 92 | Stanley Jankowski | 17 | Son | — | Poland |
| 93 | Ziggie Piatkowski | 20 | Head | Electric Welder | Pennsylvania |
| 94 | Regina Piatkowski | 19 | Wife | — | Pennsylvania |
| 95 | Walter Mroz | 28 | Head | Laborer | Pennsylvania |
| 96 | Emma Mroz | 28 | Wife | — | Pennsylvania |
| 97 | Martin Koniewski | 68 | Head | Laborer | Germany |
| 98 | Mary Koniewski | 47 | Wife | — | Germany |
| 99 | Anna Koniewski | 27 | Daughter | — | Pennsylvania |
| 100 | Raymond Koniewski | 24 | Son | Laborer | Pennsylvania |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)