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Mary Monroe — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this Mary Monroe across the 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed) — first a daughter (b.~1925), then head of a 7-person household.
Age 15
b. ~1925
Female
Daughter
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Monroe |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1925 |
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 |
|---|---|---|---|---|
| William Collins | Son | — | 15 | ~1925 |
| Jerome Monroe | Son | — | 4 | ~1936 |
| Mary Collins | Daughter | — | 15 | ~1925 |
| Mildred Monroe | Daughter | — | 21 | ~1919 |
| Marie Monroe | Head | — | 30 | ~1910 |
| Mary Monroe | Daughter | — | 15 | ~1925 |
| George Monroe | Son | — | 10 | ~1930 |
Census Appearances
1930
Baltimore, Maryland
Daughter, age 5
Baltimore, Maryland · implied b. ~1925 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Monroe |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Virginia |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Daughter, age 15
Baltimore-City-County, Maryland · implied b. ~1925 — 7 household members
| Surname | Monroe |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 15 · b. ~1925 · Maryland
★ You are viewing this record
Sibling
Mary Collins
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Collins
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jerome Monroe
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mildred Monroe
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Monroe
Sibling · 1940 · age 10
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 — Baltimore-City-County, Maryland
Open full size
1940 US Federal Census — Baltimore-City-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01523-00470)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Georgiana Fauntleroy | 30 | Lodger | Maid | Virginia |
| 42 | Marie Monroe | 30 | Head | Maid | Virginia |
| 43 | William Collins | 15 | Son | — | Maryland |
| 44 | Mary Collins | 15 | Daughter | — | Maryland |
| 45 | Mary Monroe THIS PERSON | 15 | Daughter | — | Maryland |
| 46 | George Monroe | 10 | Son | — | Maryland |
| 47 | Jerome Monroe | 4 | Son | — | Maryland |
| 48 | Mildred Monroe | 21 | Daughter | — | Maryland |
| 49 | Clarence Lofland | 45 | Head | Blacksmith | Maryland |
| 50 | Amber Lofland | 39 | Wife | — | Maryland |
| 51 | Clarence Lofland | 19 | Son | — | Maryland |
| 52 | Ethel Lofland | 17 | Daughter | — | Maryland |
| 53 | Lloyd Lofland | 15 | Son | — | Maryland |
| 54 | Ethel Lofland | 42 | Head | Typing Machine | Maryland |
| 55 | Lucille Lofland | 42 | Wife | Foreman | Maryland |
| 56 | Frances Williams | 24 | Daughter | Cook | Maryland |
| 57 | Herbert Marshall | 22 | Son | — | Maryland |
| 58 | Frank Marshall | 60 | Head | Porter | Maryland |
| 59 | Sadie Marshall | 52 | Wife | Waiter | Maryland |
| 60 | Frank Jr. Marshall | 20 | Son | Cleaner | Maryland |
| 61 | Grayson Williams | 4 | Child | — | Maryland |
| 62 | Charles Shelly | 47 | Head | Waiter | Maryland |
| 63 | Christine Shelly | 14 | Daughter | — | Maryland |
| 64 | Leroy Parker | 28 | Son in law | — | Maryland |
| 65 | Catherine Parker | 25 | Wife | Chauffeur | Maryland |
| 66 | Colleen Parker | 5 | Daughter | — | Maryland |
| 67 | Lois Parker | 3 | Daughter | — | Maryland |
| 68 | Catherine Parker | 1 | Daughter | — | Maryland |
| 69 | Joseph Boston | 43 | Head | Porter | Maryland |
| 70 | Susie Boston | 37 | Wife | — | Maryland |
| 71 | Joseph Jr. Boston | 17 | Son | — | Maryland |
| 72 | Mary Boston | 16 | Daughter | — | Maryland |
| 73 | Delores Boston | 14 | Daughter | — | Maryland |
| 74 | William Hughes | 48 | Head | Investigator | Maryland |
| 75 | Cynthia Hughes | 46 | Wife | — | Maryland |
| 76 | Margaret Hughes | 21 | Daughter | — | Maryland |
| 77 | Joseph Hughes | 19 | Son | Salesman | Maryland |
| 78 | Nellie Hughes | 17 | Daughter | — | Maryland |
| 79 | Charles Hughes | 38 | Son | Chauffeur | Maryland |
| 80 | Alice Addison | 55 | Head | — | Maryland |
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)