MC
Mary Cooper — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Mercer-County, New Jersey
Our Model Tree links this Mary Cooper across the 1920, 1930 and 1940 US Censuses in Mercer-County, New Jersey (XGBoost, ~Confirmed) — first a spouse (b.~1892), then head of a 5-person household.
Age 48
b. ~1892
Female
Spouse
Born: New Jersey
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Mercer-County, New Jersey |
| Surname | Cooper |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | Trenton City |
| 1935 Residence (County) | MERCER |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Township / Ward | Trenton City |
| Est. Birth Year | ~1892 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Alma Cooper | Daughter | — | 25 | ~1915 |
| Warren Cooper | Head | — | 53 | ~1887 |
| Warren Cooper | Son | — | 22 | ~1918 |
| William Cooper | Son | — | 16 | ~1924 |
| Mary Cooper | Spouse | — | 48 | ~1892 |
Census Appearances
1920
Mercer, New …
Spouse, age 26
Mercer, New Jersey · implied b. ~1894 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | New Jersey |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Mercer, New …
Spouse, age 36
Mercer, New Jersey · implied b. ~1894 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Mary |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | New Jersey |
| Age at First Marriage | 20 |
| Father's Birthplace | England |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Mercer-County, New …
Spouse, age 48
Mercer-County, New Jersey · implied b. ~1892 — 5 household members
| Surname | Cooper |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | Trenton City |
| 1935 Residence (County) | MERCER |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 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 Cooper across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Cooper
Spouse · 1940 · age 48 · b. ~1892 · New Jersey
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Mercer-County, New Jersey
Open full size
1940 US Federal Census — Mercer-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02436-00592)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Nissy Charles Arata | 27 | Boarder | Painter | Pennsylvania |
| 2 | Ernest Trueman | 39 | Head | — | England |
| 3 | Mary Ellen Trueman | 39 | Wife | — | England |
| 4 | Norman Wooley | 38 | Son in law | Clerk | England |
| 5 | Evelyne Wooley | 34 | Daughter | Clerk | New Jersey |
| 6 | Antonette Andrews | 64 | Head | — | New Jersey |
| 7 | Helen Andrews | 25 | Daughter | Bookkeeper | New Jersey |
| 8 | Lyman Andrews | 28 | Son | Adjuster | New Jersey |
| 9 | John Mcdonough | 56 | Head | Carpenter | New York |
| 10 | Catherine Mcdonough | 62 | Wife | — | New Jersey |
| 11 | William Lockwood | 58 | Head | Toolmaker | New Jersey |
| 12 | Carrie Lockwood | 56 | Wife | — | New Jersey |
| 13 | George Uchtmann | 39 | Head | Salesman | New Jersey |
| 14 | Eleanor Uchtmann | 28 | Wife | — | New Jersey |
| 15 | Jesse Miller | 74 | Head | — | New Jersey |
| 16 | Laura Miller | 76 | Wife | — | Pennsylvania |
| 17 | Mitchell Seibert | 50 | Son in law | Teacher | New Jersey |
| 18 | Mable Seibert | 47 | Daughter | — | New Jersey |
| 19 | Henry Seibert | 17 | Grandson | — | New Jersey |
| 20 | Charles Kramer | 43 | Head | Manager | New Jersey |
| 21 | Melinda Kramer | 42 | Wife | — | New Jersey |
| 22 | Elizabeth Kramer | 21 | Daughter | Bookkeeper | New Jersey |
| 23 | Agnes Kramer | 7 | Daughter | — | New Jersey |
| 24 | Carrie Monard | 62 | Head | — | England |
| 25 | Albert Monard | 25 | Son | Painter | New Jersey |
| 26 | Fred Monard | 46 | Son | Painter | New Jersey |
| 27 | Helen Monard | 42 | Daughter in law | — | New Jersey |
| 28 | Charles Monard | 20 | Grandson | — | New Jersey |
| 29 | Edward Monard | 16 | Grandson | — | New Jersey |
| 30 | Erwin Pilgrim | 54 | Head | Tinsmith | New Jersey |
| 31 | Laura Pilgrim | 55 | Wife | — | New Jersey |
| 32 | Warren Cooper | 53 | Head | Signal Operator | New Jersey |
| 33 | Mary Cooper THIS PERSON | 48 | Wife | — | New Jersey |
| 34 | Alma Cooper | 25 | Daughter | New Worker | New Jersey |
| 35 | Warren Jr. Cooper | 22 | Son | Printer | New Jersey |
| 36 | William Cooper | 16 | Son | — | New Jersey |
| 37 | Dewey Sr. Dicesare | 34 | Head | Truck Driver | Italy |
| 38 | Angelina Dicesare | 35 | Wife | — | New Jersey |
| 39 | Dewey Jr. Dicesare | 13 | Son | — | New Jersey |
| 40 | James Dorsi | 30 | Head | Carpenter | 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)