MC
Mary Cassidy — 1930 US Census Record
Linked across censuses1930 United States Federal Census · New York, New York
Our Model Tree links this Mary Cassidy across the 1920 and 1930 US Censuses in New York, New York (XGBoost, ~Confirmed) — first a daughter (b.~1907), then head of a 9-person household.
Age 23
b. ~1907
Female
Daughter
Born: New York
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | New York, New York |
| Surname | Cassidy |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Occupation | Stenographer |
| Industry | Publishing |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Stenographer |
| Township / Ward | New York City |
| Est. Birth Year | ~1907 |
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 |
|---|---|---|---|---|
| Kathleen Cassidy | Daughter | — | 20 | ~1910 |
| Rita Cassidy | Daughter | — | 15 | ~1915 |
| Mary Cassidy | Daughter | — | 23 | ~1907 |
| Margaret Cassidy | Daughter | — | 18 | ~1912 |
| Thomas Cassidy | Head | — | 54 | ~1876 |
| John Cassidy | Son | — | 25 | ~1905 |
| Thomas Cassidy | Son | — | 27 | ~1903 |
| James Cassidy | Son | — | 11 | ~1919 |
| Catherine Cassidy | Spouse | — | 52 | ~1878 |
Census Appearances
1920
New York, …
Daughter, age 12
New York, New York · implied b. ~1908 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cassidy |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Irish |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1930
New York, …
Daughter, age 23
New York, New York · implied b. ~1907 — 9 household members
| Surname | Cassidy |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Stenographer |
| Industry | Publishing |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
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 Cassidy across 2 US Census years (1920 and 1930) in New York, New York, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Cassidy
Daughter · 1930 · age 23 · b. ~1907 · New York
★ You are viewing this record
Sibling
John Cassidy
Sibling · 1930 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Cassidy
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Cassidy
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rita Cassidy
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kathleen Cassidy
Sibling · 1930 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Cassidy
Sibling · 1930 · age 27
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 — New York, New York
Open full size
1930 US Federal Census — New York, New York
Page Contents
50 people indexed on this census page (ia:1930:newyorkcensus00reel1579:1081)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Agatha Gomberg | 38 | Head | — | Russia |
| 52 | Sol Gomberg | 4 | Son | — | New York |
| 53 | Irma Frischman | 20 | Sister | Typist | Canada |
| 54 | Aaron Frischman | 2 | Nephew | — | New York |
| 55 | Thomas Fay | 55 | Head | Plumber | New Jersey |
| 56 | Lawrence Fay | 25 | Son | — | Maryland |
| 57 | Marie Fay | 26 | Daughter | Operator | Maryland |
| 58 | James Fay | 20 | Son | Secretary | Maryland |
| 59 | Jerome Fay | 18 | Son | Clerk | West Virginia |
| 60 | Elizabeth Cook | 28 | Daughter | Stenographer | Maryland |
| 61 | Edward Cook | 32 | Son-in-law | — | Virginia |
| 62 | Edith Cook | 2 | Daughter | — | New York |
| 63 | Eddie Smith | 24 | Roomer | — | New Jersey |
| 64 | Anna Duffy | 50 | Head | Finishing Girl | New York |
| 65 | Gertrude Duffy | 14 | Daughter | — | New York |
| 66 | Martha Duffy | 13 | Daughter | — | New York |
| 67 | Anna Duffy | 11 | Daughter | — | New York |
| 68 | Thomas Cassidy | 54 | Head | Clerk | Ireland |
| 69 | Catherine Cassidy | 52 | Wife | — | Ireland |
| 70 | Thomas Cassidy | 27 | Son | Electrician | New York |
| 71 | John Cassidy | 25 | Son | Asst. Supt. | New York |
| 72 | Mary Cassidy THIS PERSON | 23 | Daughter | Stenographer | New York |
| 73 | Kathleen Cassidy | 20 | Daughter | Stenographer | New York |
| 74 | Margaret Cassidy | 18 | Daughter | — | New York |
| 75 | Rita Cassidy | 15 | Daughter | — | New Jersey |
| 76 | James Cassidy | 11 | Son | — | New York |
| 77 | Edward Goldberg | 43 | Head | Salesman | New York |
| 78 | Anna Goldberg | 40 | Wife | — | France |
| 79 | Jerome Goldberg | 17 | Son | Clerk | New York |
| 80 | Daniel Goldberg | 15 | Son | — | New York |
| 81 | Philip Goldberg | 13 | Son | — | New York |
| 82 | Frances Goldberg | 11 | Daughter | — | New York |
| 83 | Chester Goldberg | 6 | Son | — | New York |
| 84 | George A. Rose | 35 | Head | Salesman | New York |
| 85 | Annie Rose | 66 | Mother | — | New York |
| 86 | Frank A. Cannon | 57 | Head | Salesman | New York |
| 87 | Jane Cannon | 60 | Sister | — | New York |
| 88 | Thomas F. Hurley | 50 | Step-son | Shipper | New York |
| 89 | James Duffy | 35 | Head | Foreman | Ireland |
| 90 | Catherine Duffy | 33 | Wife | — | Ireland |
| 91 | James F. Duffy | 6 | Son | — | New York |
| 92 | T. Radermacher | 8 | Daughter | — | New York |
| 93 | Margaret M. Radermacher | 5 | Daughter | — | New York |
| 94 | Martin Radermacher | 36 | Brother | Platform | Ireland |
| 95 | Peter Gromis | 42 | Head | Owner | Macedonia |
| 96 | Anna Gromis | 35 | Wife | — | Macedonia |
| 97 | John Gromis | 16 | Son | — | Macedonia |
| 98 | Agnes Gromis | 13 | Daughter | — | Macedonia |
| 99 | Peter Mcdermott | 27 | Head | Counterman | Ireland |
| 100 | Mary Mcdermott | 25 | Wife | — | Ireland |
Related Census Records
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)