MC
Mary Clarke — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this Mary Clarke across the 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed) — first a spouse (b.~1902), then head of a 9-person household.
Age 38
b. ~1902
Female
Spouse
Born: Virginia
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Clarke |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Virginia |
| 1935 Residence (City) | Baltimore |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Occupation | H |
| Industry | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
| Occupation | H |
| Township / Ward | Baltimore |
| Est. Birth Year | ~1902 |
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 |
|---|---|---|---|---|
| Thomas Clarke | Son | — | 14 | ~1926 |
| Mary Clarke | Spouse | — | 38 | ~1902 |
| Ira Moore | Other | — | 31 | ~1909 |
| Nicolas Washington | Other | — | 43 | ~1897 |
| William Clarke | Head | — | 39 | ~1901 |
| Matthew Clarke | Son | — | 18 | ~1922 |
| Robert Clarke | Son | — | 10 | ~1930 |
| William Clarke | Son | — | 11 | ~1929 |
| John Thomas | Other | — | 39 | ~1901 |
Census Appearances
1930
Baltimore, Maryland
Spouse, age 27
Baltimore, Maryland · implied b. ~1903 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Virginia |
| Age at First Marriage | 17 |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Virginia |
| Can Read/Write | Yes |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
1940
Baltimore-City-County, Maryland
Spouse, age 38
Baltimore-City-County, Maryland · implied b. ~1902 — 9 household members
| Surname | Clarke |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Virginia |
| 1935 Residence (City) | Baltimore |
| 1935 Residence (County) | Baltimore City |
| Occupation | H |
| Industry | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
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 Clarke across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Clarke
Spouse · 1940 · age 38 · b. ~1902 · Maryland
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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
27 people indexed on this census page (nara:1940:m-t0627-01514-00295)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Rita Brown | 14 | Daughter | — | Florida |
| 42 | Walter Harris | 35 | Head | Laborer | Virginia |
| 43 | Lucille Harris | 34 | Wife | H | Virginia |
| 44 | Walter Jr. Harris | 10 | Son | — | Maryland |
| 45 | Maurice Harris | 8 | Son | — | Maryland |
| 46 | Maratha Harris | 5 | Daughter | — | Maryland |
| 47 | Calvin Harris | 3 | Son | — | Maryland |
| 48 | Walter Tull | 25 | Head | Laborer | Virginia |
| 49 | Cordelia Tull | 32 | Wife | H | North Carolina |
| 50 | Walter Tull | 16 | Son | New Worker | Maryland |
| 51 | Burley Tull | 14 | Son | — | Maryland |
| 52 | Ella Carter | 62 | Mother-in-law | U | North Carolina |
| 53 | Matthew Washington | 28 | Lodger | Laborer | Virginia |
| 54 | Helena Washington | 20 | Lodger | H | Maryland |
| 55 | William Clarke | 39 | Head | Laborer | Virginia |
| 56 | Mary Clarke THIS PERSON | 38 | Wife | H | Virginia |
| 57 | Matthew Clarke | 18 | Son | New Worker | Virginia |
| 58 | Thomas Clarke | 14 | Son | — | Virginia |
| 59 | William Clarke | 11 | Son | — | Maryland |
| 60 | Robert Clarke | 10 | Son | — | Maryland |
| 61 | Ira Moore | 31 | Lodger | H | Virginia |
| 62 | John Thomas | 39 | Lodger | Laborer | North Carolina |
| 63 | Nicolas Washington | 43 | Lodger | Cook | Virginia |
| 64 | Abigail Smith | 52 | Head | Plumber | Maryland |
| 65 | Robert Bridges | 38 | Lodger | Driver | Maryland |
| 66 | Margaret Bridges | 17 | Lodger | — | Maryland |
| 67 | Edna Bridges | 16 | Lodger | — | Maryland |
Related Census Records
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)