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Mary Monroe — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Hudson-County, New Jersey
Our Model Tree links this Mary Monroe across the 1930 and 1940 US Censuses in Hudson-County, New Jersey (XGBoost, ~Confirmed) — first a daughter (b.~1927), then head of a 9-person household.
Age 13
b. ~1927
Female
Daughter
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hudson-County, New Jersey |
| Surname | Monroe |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | JERSEY CITY |
| 1935 Residence (County) | HUDSON |
| Additional Details | |
| Highest Grade | Yes 6 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Township / Ward | Jersey City |
| Est. Birth Year | ~1927 |
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 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Agnes Monroe | Daughter | — | 5 | ~1935 |
| Mary Monroe | Daughter | — | 13 | ~1927 |
| Michael Monroe | Son | — | 8 | ~1932 |
| John Monroe | Son | — | 14 | ~1926 |
| John Monroe | Head | — | 40 | ~1900 |
| Celia Monroe | Spouse | — | 35 | ~1905 |
| Martin Monroe | Son | — | 11 | ~1929 |
| James Monroe | Son | — | 7 | ~1933 |
| William Monroe | Son | — | 15 | ~1925 |
Census Appearances
1930
Union, New …
Other, age 3
Union, New Jersey · implied b. ~1927 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Monroe |
| Given Name | Mary |
| Relationship to Head | Niece |
| Sex | F |
| Color / Race | Black |
| Age | 3 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Florida |
| Mother's Birthplace | Florida |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Hudson-County, New …
Daughter, age 13
Hudson-County, New Jersey · implied b. ~1927 — 9 household members
| Surname | Monroe |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | JERSEY CITY |
| 1935 Residence (County) | HUDSON |
| Highest Grade | Yes 6 |
| 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 Monroe across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Monroe
Daughter · 1940 · age 13 · b. ~1927 · New Jersey
★ You are viewing this record
Sibling
John Monroe
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Monroe
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Michael Monroe
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Martin Monroe
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Agnes Monroe
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Monroe
Sibling · 1940 · age 7
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 — Hudson-County, New Jersey
Open full size
1940 US Federal Census — Hudson-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02401-00027)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Edward Topoleski | 25 | Son in law | Packer | New Jersey |
| 42 | Anna Topoleski | 22 | Daughter | Feeder | New Jersey |
| 43 | John Monroe | 40 | Head | Laborer | Eire |
| 44 | Celia (X) Monroe | 35 | Wife | — | Eire |
| 45 | William Monroe | 15 | Son | — | New Jersey |
| 46 | John Monroe | 14 | Son | — | New Jersey |
| 47 | Mary Monroe THIS PERSON | 13 | Daughter | — | New Jersey |
| 48 | Martin Monroe | 11 | Son | — | New Jersey |
| 49 | Michael Monroe | 8 | Son | — | New Jersey |
| 50 | James Monroe | 7 | Son | — | New Jersey |
| 51 | Agnes Monroe | 5 | Daughter | — | New Jersey |
| 52 | Anna (X) Killen | 47 | Head | — | Eire |
| 53 | Edward Killen | 17 | Son | New Worker | New Jersey |
| 54 | Mae Killen | 15 | Daughter | — | New Jersey |
| 55 | Anna Killen | 12 | Daughter | — | New Jersey |
| 56 | Edward Mitchell | 48 | Son in law | Night Watchman | New Jersey |
| 57 | Frank Plant | 40 | Head | — | Massachusetts |
| 58 | Madeline (X) Plant | 37 | Wife | — | New Jersey |
| 59 | Frank Plant | 11 | Son | — | New Jersey |
| 60 | Richard Plant | 7 | Son | — | New Jersey |
| 61 | Martin Plant | 6 | Son | — | New Jersey |
| 62 | George Plant | 3 | Son | — | New Jersey |
| 63 | Madeline Plant | 2 | Daughter | — | New Jersey |
| 64 | Andrew Plant | 0 | Son | — | New Jersey |
| 65 | John (X) Tryciecki | 49 | Head | Longshoreman | Poland |
| 66 | Frank Kondracky | 24 | Son in law | Bus Boy | New York |
| 67 | Anna Kondracky | 22 | Daughter | — | New Jersey |
| 68 | Phyllis Kondracky | 0 | Grandchild | — | New Jersey |
| 69 | Joseph Schwartz | 52 | Lodger | Fire Cleaner | Poland |
| 70 | George Pipher | 38 | Head | Laborer | New Jersey |
| 71 | Loretta (X) Pipher | 35 | Wife | — | New Jersey |
| 72 | Charles Pipher | 10 | Son | — | New Jersey |
| 73 | Dolores Pipher | 8 | Daughter | — | New Jersey |
| 74 | Raymond Pipher | 7 | Son | — | New Jersey |
| 75 | Franklin Pipher | 5 | Son | — | New Jersey |
| 76 | Loretta Pipher | 3 | Daughter | — | New Jersey |
| 77 | Stanley Sczypinski | 46 | Head | Laborer | Poland |
| 78 | Mary (X) Sczypinski | 42 | Wife | — | Poland |
| 79 | John Sczypinski | 22 | Son | Helper | New Jersey |
| 80 | Irene Sczypinski | 20 | Daughter | Folder | New Jersey |
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)