SC
Sarah Cooper — 1940 US Census Record
Model Tree available1940 United States Federal Census · Kings-County, New York
Our Model Tree links this Sarah Cooper across the 1920, 1930 and 1940 US Censuses in Kings-County, New York (XGBoost, ~Confirmed), with identified parents Bertha & Samuel — first a daughter (b.~1911), then head of a 3-person household.
Age 29
b. ~1911
Female
Daughter
Born: New York
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Kings-County, New York |
| Surname | COOPER |
| Given Name | SARAH JUDITH |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | Borough of Brooklyn |
| 1935 Residence (County) | Kings |
| Additional Details | |
| Occupation | Teacher |
| Industry | Public School |
| Class of Worker | GW |
| Hours Worked | 25 |
| Income (1939) | 1200 |
| Highest Grade | C 3 |
| 1935 Residence | Same house |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Teacher |
| Township / Ward | Borough Of Brooklyn |
| Est. Birth Year | ~1911 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Sarah | Age | Birth yr |
|---|---|---|---|---|
| Nancy Cooper | Daughter | — | 17 | ~1923 |
| Sarah Cooper | Daughter | — | 29 | ~1911 |
| Hattie Cooper | Head | — | 52 | ~1888 |
Census Appearances
1920
Kings, New …
Daughter, age 7
Kings, New York · implied b. ~1913 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Sarah |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Russia |
| Mother's Birthplace | Russia |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1930
Kings, New …
Daughter, age 18
Kings, New York · implied b. ~1912 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Sarah |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Russia |
| Mother's Birthplace | Russia |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Kings-County, New …
Daughter, age 29
Kings-County, New York · implied b. ~1911 — 3 household members
| Surname | COOPER |
| Given Name | SARAH JUDITH |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | Borough of Brooklyn |
| 1935 Residence (County) | Kings |
| Occupation | Teacher |
| Industry | Public School |
| Class of Worker | GW |
| Hours Worked | 25 |
| Income (1939) | 1200 |
| Highest Grade | C 3 |
| 1935 Residence | Same house |
| 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 Sarah Cooper across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Bertha Cooper (~0.92 confidence) and father Samuel Cooper (~0.92 confidence) and mother Hattie Cooper (~0.92 confidence) and mother Mollie Cooper (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Bertha Cooper
b. ~1872
Source mother
● Household
· direct · ~0.92
Father
Samuel Cooper
b. ~1885
Source father
● Household
· direct · ~0.92
Mother
Hattie Cooper
b. ~1888
Source mother
● Household
· direct · ~0.92
Mother
Mollie Cooper
b. ~1891
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Sarah Cooper
Daughter · 1940 · age 29 · b. ~1911 · New York
★ You are viewing this record
Sibling
Nancy Cooper
Sibling · 1940 · age 17
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
1940 US Federal Census — Kings-County, New York
Open full size
1940 US Federal Census — Kings-County, New York
Page Contents
35 people indexed on this census page (nara:1940:m-t0627-02617-00668)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Angelon Semeraro | 57 | Head | Insurance Agent | Italy |
| 42 | Adele Semeraro | 47 | Wife | — | Italy |
| 43 | Laura Semeraro | 16 | Daughter | — | New York |
| 44 | Joseph Buxbaum | 65 | Head | — | Austria |
| 45 | Anne (X) Buxbaum | 63 | Wife | — | Hungary |
| 50 | Sidney Jaffe | 22 | Head | Proprietor | New York |
| 51 | Nora (X) Jaffe | 20 | Wife | — | New York |
| 52 | Harold Switsky | 46 | Head | Milk Man | Russia |
| 53 | Fannie (X) Switsky | 42 | Wife | — | Russia |
| 54 | Norman Switsky | 16 | Son | — | New York |
| 55 | Jack Switsky | 13 | Son | — | New York |
| 56 | Sam Blackman | 40 | Head | Owner | Russia |
| 57 | Shirley (X) Blackman | 35 | Wife | — | New Jersey |
| 58 | Harriet Blackman | 13 | Daughter | — | New Jersey |
| 59 | Richard Blackman | 8 | Son | — | New York |
| 60 | Hattie Cooper | 52 | Head | — | Rumania |
| 61 | Sarah Judith Cooper THIS PERSON | 29 | Daughter | Teacher | New York |
| 62 | Nancy (X) Cooper | 17 | Daughter | — | New York |
| 64 | Barney Stein | 37 | Head | Masseur | New York |
| 65 | Clara (X) Stein | 34 | Wife | — | New York |
| 66 | Albert Stein | 14 | Son | — | New York |
| 67 | Harry Stein | 26 | Brother | Operator | New York |
| 68 | Louis Cohen | 50 | Cousin | Operator | Rumania |
| 69 | Lizzie Cohen | 45 | Cousin | — | Rumania |
| 70 | Joseph Stepsis | 30 | Head | Puller | Pennsylvania |
| 71 | Helen (X) Stepsis | 26 | Wife | Packer | New York |
| 72 | Leon Scheffler | 56 | Head | Salesman | Rumania |
| 73 | Ethela Scheffler | 56 | Wife | — | Rumania |
| 74 | Israel Scheffler | 16 | Son | — | New York |
| 75 | Joseph (X) Sasto | 29 | Head | Laborer | New York |
| 76 | Sophie Sasto | 25 | Wife | Packer | New York |
| 77 | Morris Grotzinstein | 56 | Head | Builder | Russia |
| 78 | Sophie (X) Grotzinstein | 51 | Wife | — | New York |
| 79 | Gasper Palazzolo | 27 | Head | Paste Maker | New York |
| 80 | Lilian Palazzolo | 23 | Wife | Operator | New York |
Pedigree Summary
Sarah + 1 sibling
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 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)