MD
Mary Decker — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Essex-County, New Jersey
Our Model Tree links this Mary Decker across the 1930 and 1940 US Censuses in Essex-County, New Jersey (XGBoost, ~Confirmed) — first a daughter (b.~1921), then head of a 7-person household.
Age 19
b. ~1921
Female
Daughter
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, New Jersey |
| Surname | Decker |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Bloomfield town |
| 1935 Residence (County) | Essex |
| Additional Details | |
| Occupation | Policy writer |
| Industry | Insurance Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 750 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Policy Writer |
| Township / Ward | Bloomfield Town |
| Est. Birth Year | ~1921 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Florence Decker | Daughter | — | 17 | ~1923 |
| Mary Decker | Head | — | 44 | ~1896 |
| Mary Decker | Daughter | — | 19 | ~1921 |
| Patricia Decker | Daughter | — | 8 | ~1932 |
| Katherine Decker | Daughter | — | 14 | ~1926 |
| Katherine Flynn | Other | — | 81 | ~1859 |
| George Decker | Son | — | 16 | ~1924 |
Census Appearances
1930
Essex, New …
Daughter, age 9
Essex, New Jersey · implied b. ~1921 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Decker |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New York |
| Mother's Birthplace | New Mexico |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Essex-County, New …
Daughter, age 19
Essex-County, New Jersey · implied b. ~1921 — 7 household members
| Surname | Decker |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Bloomfield town |
| 1935 Residence (County) | Essex |
| Occupation | Policy writer |
| Industry | Insurance Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 750 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
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 Decker across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Decker
Daughter · 1940 · age 19 · b. ~1921 · New Jersey
★ You are viewing this record
Sibling
George Decker
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Decker
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Katherine Decker
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Florence Decker
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 — Essex-County, New Jersey
Open full size
1940 US Federal Census — Essex-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02329-00531)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary X Decker | 44 | Head | Saleswoman | New Jersey |
| 2 | Mary Decker THIS PERSON | 19 | Daughter | Policy Writer | New Jersey |
| 3 | Florence Decker | 17 | Daughter | Helper | New Jersey |
| 4 | George Decker | 16 | Son | Order Clerk | New Jersey |
| 5 | Katherine Decker | 14 | Daughter | — | New Jersey |
| 6 | Patricia Decker | 8 | Daughter | — | New Jersey |
| 7 | Katherine Flynn | 81 | Mother | — | Ireland |
| 8 | Elizabeth Cullen | 41 | Head | Stenographer | New Jersey |
| 9 | Joseph A Dodd | 71 | Head | — | New Jersey |
| 10 | Lenora Dodd | 68 | Wife | — | New Jersey |
| 11 | Brouse Morgan | 66 | Head | Medical Doctor | New Jersey |
| 12 | Anna C Morgan | 66 | Wife | — | New Jersey |
| 13 | William H Cedrus | 68 | Head | Stockkeeper | New Jersey |
| 14 | Augusta Vogel | 74 | Housekeeper | Housekeeper | Germany |
| 15 | Melvin P Taylor | 41 | Head | Chemical Engineer | Mass. |
| 16 | Bella Taylor | 38 | Wife | — | New York |
| 17 | Elaine Taylor | 12 | Daughter | — | Elizabeth, N.J. |
| 18 | Lois Taylor | 11 | Daughter | — | Massachusetts |
| 19 | Harold B Thomas | 48 | Head | Business Executive | Pennsylvania |
| 20 | Ruth Thomas | 52 | Wife | — | Kansas |
| 21 | Ruth Ann Thomas | 18 | Daughter | — | Pennsylvania |
| 22 | Katherine Thomas | 15 | Daughter | — | New Jersey |
| 23 | Peter Steel | 48 | Head | Carpenter | England |
| 24 | Margaret Steel | 48 | Wife | — | Scotland |
| 25 | John Marshall | 76 | Head | Brass Moulder | Scotland |
| 26 | Helen Marshall | 73 | Wife | — | Scotland |
| 27 | Jessie W Marshall | 50 | Daughter | Bookkeeper | Scotland |
| 28 | Lilly Marshall | 49 | Daughter | Stenographer | Scotland |
| 29 | Walter Markelbach | 34 | Head | Medical Doctor | Germany |
| 30 | Mary Markelbach | 32 | Wife | — | New York |
| 31 | Donald Markelbach | 4 | Son | — | New Jersey |
| 32 | Richard Markelbach | 2 | Son | — | New Jersey |
| 33 | Anne Pratt | 23 | Servant | Receptionist | New Jersey |
| 34 | Jesse S Weller | 60 | Head | Clerk | New Jersey |
| 35 | Mary Weller | 58 | Wife | Typist | New Jersey |
| 36 | William A Grohe | 45 | Head | Clerk | New Jersey |
| 37 | Josephine Grohe | 43 | Wife | — | New Jersey |
| 38 | William Jr Grohe | 21 | Son | Machinist | New Jersey |
| 39 | Virginia Grohe | 17 | Daughter | — | New Jersey |
| 40 | Clarence H Hedden | 55 | Head | Executive | New Jersey |
Related Census Records
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)