MH
Mary Harris — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this Mary Harris across the 1920, 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed) — first a spouse (b.~1880), then head of a 3-person household.
Age 60
b. ~1880
Female
Spouse
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Harris |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1880 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| John Harris | Head | — | 65 | ~1875 |
| William Harris | Son | — | 24 | ~1916 |
| Mary Harris | Spouse | — | 60 | ~1880 |
Census Appearances
1920
Baltimore, Maryland
Spouse, age 38
Baltimore, Maryland · implied b. ~1882 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harris |
| Given Name | Mary |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Spouse, age 50
Baltimore, Maryland · implied b. ~1880 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harris |
| Given Name | Mary A. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 21 |
| 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
Spouse, age 60
Baltimore-City-County, Maryland · implied b. ~1880 — 3 household members
| Surname | Harris |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Highest Grade | H-4 |
| 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 Harris across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Harris
Spouse · 1940 · age 60 · b. ~1880 · Maryland
★ 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 — 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-t0627-01526-00090)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Harvey Harris | 47 | Head | Mechanic | Maryland |
| 2 | Mabel G. Harris | 40 | Wife | — | Maryland |
| 3 | Herbert J. Steffan | 45 | Lodger | Commercial Artist | Penna. |
| 4 | Harvey L. Riley | 46 | Lodger | Carpenter | Md. |
| 5 | Otho Smith | 31 | Head | Baker | Alabama |
| 6 | Lovee Smith | 30 | Wife | Seamstress | Alabama |
| 7 | John Harris | 65 | Head | — | Maryland |
| 8 | Mary Harris THIS PERSON | 60 | Wife | — | Maryland |
| 9 | William Harris | 24 | Son | — | Maryland |
| 10 | Leo Thomas | 26 | Head | Carpenter | Maryland |
| 11 | Madeline Thomas | 19 | Wife | — | Maryland |
| 12 | Audrey Thomas | 1 | Daughter | — | Maryland |
| 13 | Sarah Mcnally | 49 | Head | — | Maryland |
| 14 | Edward Mcnally | 24 | Son | — | Maryland |
| 15 | James Mcnally | 22 | Son | — | Maryland |
| 16 | Thelma Mcnally | 15 | Daughter | — | Maryland |
| 17 | John Hartley | 60 | Head | — | Maryland |
| 18 | Ida Hartley | 60 | Wife | — | Maryland |
| 19 | George Mayer | 55 | Head | — | Maryland |
| 20 | Olivia Mayer | 30 | Daughter | — | Maryland |
| 21 | Daniel Allen | 5 | Son | — | Maryland |
| 22 | Allen J. Allen | 22 | Head | Plasterer | Maryland |
| 23 | Josephine Allen | 17 | Wife | — | Maryland |
| 24 | Alberta Allen | 0 | Daughter | — | Maryland |
| 25 | Charles Hirschman | 62 | Head | — | Maryland |
| 26 | Eva Hirschman | 57 | Wife | — | Maryland |
| 27 | Frank Hirschman | 18 | Nephew | — | Maryland |
| 28 | Eva Hirschman | 19 | Daughter | — | Maryland |
| 29 | Margaret Hirschman | 15 | Daughter | — | Maryland |
| 30 | Betty Hirschman | 14 | Daughter | — | Maryland |
| 31 | Charles Tangman | 47 | Head | Clerk | Maryland |
| 32 | Bertha Tangman | 46 | Wife | — | Maryland |
| 33 | Vernon Tangman | 18 | Son | — | Maryland |
| 34 | Bertha Mcghee | 62 | Head | — | Penna. |
| 35 | Ruth Linker | 40 | Lodger | Sales | Miss. |
| 36 | Katherine Stiles | 34 | Head | Filler | Greece |
| 37 | Lee Stiles | 12 | Daughter | — | Maryland |
| 38 | Meyer Werner | 51 | Head | Taxi-Driver | Russia |
| 39 | Evelyn Werner | 50 | Wife | — | Russia |
| 40 | Katherine Levens | 61 | 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)