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Margaret Mcgrath — 1930 US Census Record
Model Tree available1930 United States Federal Census · Philadelphia, Pennsylvania
Our Model Tree links this Margaret Mcgrath across the 1910, 1920 and 1930 US Censuses in Philadelphia, Pennsylvania (XGBoost, ~Confirmed), with identified parents Owen & Margaret — first a daughter (b.~1905), then head of a 9-person household.
Age 25
b. ~1905
Female
Daughter
Born: Pennsylvania
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Philadelphia, Pennsylvania |
| Surname | McGrath |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Irish Free State |
| Additional Details | |
| Occupation | Stenographer |
| Industry | Oil Refinery |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Stenographer |
| Township / Ward | Philadelphia City |
| 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.
9 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| Joseph Mcgrath | Son | — | 19 | ~1911 |
| Marie Mcgrath | Spouse | — | 53 | ~1877 |
| John Mcgrath | Son | — | 22 | ~1908 |
| Edward Mcgrath | Son | — | 14 | ~1916 |
| Owen Mcgrath | Head | — | 63 | ~1867 |
| Margaret Mcgrath | Daughter | — | 25 | ~1905 |
| Marie Mcgrath | Daughter | — | 24 | ~1906 |
| Anastasia Mcgrath | Daughter | — | 21 | ~1909 |
| James Mcgrath | Son | — | 16 | ~1914 |
Census Appearances
1910
Philadelphia, Pennsylvania
Daughter, age 4
Philadelphia, Pennsylvania · implied b. ~1906 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1920
Philadelphia, Pennsylvania
Daughter, age 14
Philadelphia, Pennsylvania · implied b. ~1906 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | Margaret |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| 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 — 9 household members
| Surname | McGrath |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Irish Free State |
| Occupation | Stenographer |
| Industry | Oil Refinery |
| 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 Margaret Mcgrath across 3 US Census years (1910, 1920 and 1930) in Philadelphia, Pennsylvania, using XGBoost record linkage. Identified parents: father Owen Mcgrath (~0.92 confidence) and mother Margaret Mcgrath (~0.92 confidence) and father John Mcgrath (~0.92 confidence) and mother Marie Mcgrath (~0.92 confidence) and mother Laura Mcgrath (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Owen Mcgrath
b. ~1867
Source father
● Household
· direct · ~0.92
Mother
Margaret Mcgrath
b. ~1870
Source mother
● Household
· direct · ~0.92
Father
John Mcgrath
b. ~1871
Source father
● Household
· direct · ~0.92
Mother
Marie Mcgrath
b. ~1877
Source mother
● Household
· direct · ~0.92
Mother
Laura Mcgrath
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Margaret Mcgrath
Daughter · 1930 · age 25 · b. ~1905 · Pennsylvania
★ You are viewing this record
Sibling
John Mcgrath
Sibling · 1930 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Mcgrath
Sibling · 1930 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Mcgrath
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Mcgrath
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anastasia Mcgrath
Sibling · 1930 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marie Mcgrath
Sibling · 1930 · age 24
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
1930 US Federal Census — Philadelphia, Pennsylvania
Open full size
1930 US Federal Census — Philadelphia, Pennsylvania
Page Contents
17 people indexed on this census page (ia:1930:fifteenthcensus00reel2109ns:0019)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Owen Mcgrath | 63 | Head | — | Pennsylvania |
| 2 | Marie Mcgrath | 53 | Wife | — | Irish Free State |
| 3 | Margaret Mcgrath THIS PERSON | 25 | Daughter | Stenographer | Pennsylvania |
| 4 | Marie Mcgrath | 24 | Daughter | Bookkeeper | Pennsylvania |
| 5 | John Mcgrath | 22 | Son | Cost Clerk | Pennsylvania |
| 6 | Anastasia Mcgrath | 21 | Daughter | Nurse | Pennsylvania |
| 7 | Joseph Mcgrath | 19 | Son | — | Pennsylvania |
| 8 | James Mcgrath | 16 | Son | — | Pennsylvania |
| 9 | Edward Mcgrath | 14 | Son | — | Pennsylvania |
| 10 | Anna G. Robertson | 67 | Head | — | Pennsylvania |
| 11 | Clara Tellow | 75 | Head | — | Pennsylvania |
| 12 | Ella Bradley | 73 | Sister | — | Pennsylvania |
| 13 | Clara T. Bradley | 42 | Niece | Bookkeeper | Pennsylvania |
| 14 | Mary Johnson | 39 | Servant | Servant | Delaware |
| 15 | Nelson Callard | 39 | Servant | Servant | Delaware |
| 16 | Harvey H. Swaddell | 78 | Head | — | Pennsylvania |
| 17 | Helen Swaddell | 41 | Daughter | Teacher | Pennsylvania |
Pedigree Summary
Margaret + 6 siblings
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
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)