MP
Mary Post — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Essex-County, New Jersey
Our Model Tree links this Mary Post across the 1930 and 1940 US Censuses in Essex-County, New Jersey (XGBoost, ~Confirmed) — first a daughter (b.~1930), then head of a 10-person household.
Age 10
b. ~1930
Female
Daughter
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, New Jersey |
| Surname | Post |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Newark |
| 1935 Residence (County) | Essex |
| Additional Details | |
| Highest Grade | No 3 |
| 1935 Residence | Same House |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Township / Ward | Newark |
| Est. Birth Year | ~1930 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Alice Post | Daughter | — | 12 | ~1928 |
| Evert Post | Son | — | 4 | ~1936 |
| Richard Post | Son | — | 6 | ~1934 |
| Martha Toussaint | Other | — | 62 | ~1878 |
| Matthew Post | Son | — | 16 | ~1924 |
| Jesse Post | Head | — | 48 | ~1892 |
| Jennie Post | Spouse | — | 40 | ~1900 |
| Mary Post | Daughter | — | 10 | ~1930 |
| Audrie Post | Daughter | — | ~1940 | |
| George Post | Son | — | 2 | ~1938 |
Census Appearances
1930
Essex, New …
Daughter, age
Essex, New Jersey · implied b. ~1930 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Post |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Can Read/Write | No |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Essex-County, New …
Daughter, age 10
Essex-County, New Jersey · implied b. ~1930 — 10 household members
| Surname | Post |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Newark |
| 1935 Residence (County) | Essex |
| Highest Grade | No 3 |
| 1935 Residence | Same House |
| 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 Post across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Post
Daughter · 1940 · age 10 · b. ~1930 · New Jersey
★ You are viewing this record
Sibling
Audrie Post
Sibling · 1940 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Matthew Post
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Post
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Post
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Post
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Evert Post
Sibling · 1940 · age 4
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
31 people indexed on this census page (nara:1940:m-t0627-02424-00037)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Patrick O'Connor | 49 | Head | Driver | Eire |
| 42 | Winifred O'Connor | 44 | Wife | — | Eire |
| 43 | Mary O'Connor | 23 | Daughter | Clerk | New Jersey |
| 44 | John O'Connor | 20 | Son | New Worker | New Jersey |
| 45 | Lawrence O'Connor | 18 | Son | — | New Jersey |
| 46 | Theresa O'Connor | 14 | Daughter | — | New Jersey |
| 47 | Josephine O'Connor | 9 | Daughter | — | New Jersey |
| 48 | Michael O'Connor | 2 | Son | — | New Jersey |
| 49 | Jesse Post | 48 | Head | Report-Writer | New Jersey |
| 50 | Jennie Post | 40 | Wife | — | New Jersey |
| 51 | Matthew Post | 16 | Son | — | New Jersey |
| 52 | Alice Post | 12 | Daughter | — | New Jersey |
| 53 | Mary Post THIS PERSON | 10 | Daughter | — | New Jersey |
| 54 | Richard Post | 6 | Son | — | New Jersey |
| 55 | Evert Post | 4 | Son | — | New Jersey |
| 56 | George Post | 2 | Son | — | New Jersey |
| 57 | Audrie Post | 0 | Daughter | — | New Jersey |
| 58 | Martha Toussaint | 62 | Lodger | Laborer | New Jersey |
| 59 | George Serman | 36 | Head | Police | New Jersey |
| 60 | Hazel Serman | 36 | Wife | — | New Jersey |
| 61 | Marion Serman | 14 | Daughter | — | New Jersey |
| 62 | George Serman | 14 | Son | — | New Jersey |
| 63 | Hazel Serman | 12 | Daughter | — | New Jersey |
| 64 | Gloria Serman | 10 | Daughter | — | New Jersey |
| 65 | Noel Serman | 34 | Brother | New Worker | New Jersey |
| 66 | Benjamin Morris | 41 | Head | Foreman | Pennsylvania |
| 67 | Ella Morris | 42 | Wife | — | New York |
| 68 | William Haines | 17 | Nephew | New Worker | New Jersey |
| 69 | Dora Haines | 75 | Mother-in-law | — | New York |
| 70 | Edward Ellis | 43 | Head | Machinist | California |
| 71 | Emma Ellis | 32 | Wife | — | California |
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)