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Mary Mullen — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this Mary Mullen across the 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed) — first a daughter (b.~1920), then head of a 6-person household.
Age 20
b. ~1920
Female
Daughter
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Mullen |
| Given Name | Mary T. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore city |
| 1935 Residence (County) | Baltimore city |
| Additional Details | |
| Occupation | Student Nurse |
| Industry | City Hospital |
| Class of Worker | PW |
| Highest Grade | Hs 3 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Student Nurse |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1920 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Mullen | Daughter | — | 20 | ~1920 |
| Anne Mullen | Daughter | — | 14 | ~1926 |
| John Mullen | Head | — | 53 | ~1887 |
| Bernard Mullen | Son | — | 22 | ~1918 |
| Edward Mullen | Son | — | 18 | ~1922 |
| Anna Mullen | Spouse | — | 43 | ~1897 |
Census Appearances
1930
Baltimore, Maryland
Daughter, age 9
Baltimore, Maryland · implied b. ~1921 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mullins |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Daughter, age 20
Baltimore-City-County, Maryland · implied b. ~1920 — 6 household members
| Surname | Mullen |
| Given Name | Mary T. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore city |
| 1935 Residence (County) | Baltimore city |
| Occupation | Student Nurse |
| Industry | City Hospital |
| Class of Worker | PW |
| Highest Grade | Hs 3 |
| 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 Mullen across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mullen
Daughter · 1940 · age 20 · b. ~1920 · Maryland
★ You are viewing this record
Sibling
Edward Mullen
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anne Mullen
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernard Mullen
Sibling · 1940 · age 22
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-t0627-01517-00257)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Joseph P. Malinowski | 32 | Lodger | Steel Maker | Maryland |
| 2 | Blanche H. Malinowski | 32 | Daughter | — | Maryland |
| 3 | Luther L. Hipp | 29 | Head | Laborer | Maryland |
| 4 | Edith M. Hipp | 29 | Wife | Housewife | Maryland |
| 5 | Donald Hipp | 2 | Son | — | Maryland |
| 6 | James Bull | 27 | Lodger | Salesman | Maryland |
| 7 | Hazel M. Bull | 24 | Lodger | — | Maryland |
| 8 | Clinton L. Hendrickson | 34 | Head | Chauffeur | Virginia |
| 9 | Ethel M. Hendrickson | 35 | Wife | Housewife | Maryland |
| 10 | Clinton L. Jr. Hendrickson | 13 | Son | — | Maryland |
| 11 | Earl E. Hendrickson | 12 | Son | — | Maryland |
| 12 | Helen M. Hendrickson | 9 | Daughter | — | Maryland |
| 13 | Howard W. Hendrickson | 6 | Son | — | Maryland |
| 14 | Clinton Jr. Hendrickson | 4 | Son | — | Maryland |
| 15 | Roland Hance | 45 | Lodger | Box Maker | Texas |
| 16 | Joseph S. O'Brien | 74 | Head | — | Maryland |
| 17 | George L. Selby | 40 | Head | Carpenter | Alabama |
| 18 | Pearl M. Selby | 40 | Wife | Housewife | Maryland |
| 19 | John A. Selby | 13 | Son | — | Maryland |
| 20 | James W. Selby | 10 | Son | — | Maryland |
| 21 | Doris L. Selby | 3 | Daughter | — | Maryland |
| 22 | Edward J. Hull | 52 | Head | Carpenter | Maryland |
| 23 | Mary L. Hull | 45 | Wife | Housewife | Maryland |
| 24 | Joseph P. Hull | 16 | Son | — | Maryland |
| 25 | John L. Hull | 12 | Son | — | Maryland |
| 26 | James S. Fasciano | 44 | Head | — | Italy |
| 27 | Concetta Fasciano | 41 | Wife | Seamstress | Italy |
| 28 | Samuel Fasciano | 20 | Son | — | Pennsylvania |
| 29 | Rose Fasciano | 19 | Daughter | — | Maryland |
| 30 | Nancy Fasciano | 15 | Daughter | — | Maryland |
| 31 | Lena Fasciano | 4 | Daughter | — | Maryland |
| 32 | Frank S. Romer | 24 | Head | Chauffeur | Maryland |
| 33 | Josephine Romer | 24 | Wife | Housewife | Maryland |
| 34 | James Romer | 1 | Son | — | Maryland |
| 35 | John T. Mullen | 53 | Head | Mechanic | Maryland |
| 36 | Anna R. Mullen | 43 | Wife | Housewife | Maryland |
| 37 | Bernard J. Mullen | 22 | Son | — | Maryland |
| 38 | Mary T. Mullen THIS PERSON | 20 | Daughter | Student Nurse | Maryland |
| 39 | Edward J. Mullen | 18 | Son | — | Maryland |
| 40 | Anne Mullen | 14 | Daughter | — | 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)