MJ
Mary Jones — 1940 US Census Record
Model Tree available1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this Mary Jones across the 1920, 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed), with identified parents Mary — first a spouse (b.~1891), then head of a 7-person household.
Age 49
b. ~1891
Female
Spouse
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Jones |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Highest Grade | No 7 |
| 1935 Residence | Same House |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Baltimore |
| Est. Birth Year | ~1891 |
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 |
|---|---|---|---|---|
| Erma Jones | Daughter | — | 21 | ~1919 |
| Venitta Yates | Daughter | — | 4 | ~1936 |
| Mildred Yates | Daughter | — | 26 | ~1914 |
| Thomas Jones | Head | — | 51 | ~1889 |
| Leroy Yates | Other | — | 25 | ~1915 |
| Barbara Yates | Other | — | ~1940 | |
| Mary Jones | Spouse | — | 49 | ~1891 |
Census Appearances
1920
Baltimore, Maryland
Daughter, age 26
Baltimore, Maryland · implied b. ~1894 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jones |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 26 |
| 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 37
Baltimore, Maryland · implied b. ~1893 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jones |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Laundress |
| Industry | Private family |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Spouse, age 49
Baltimore-City-County, Maryland · implied b. ~1891 — 7 household members
| Surname | Jones |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore |
| 1935 Residence (County) | Baltimore City |
| Highest Grade | No 7 |
| 1935 Residence | Same House |
| 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 Jones across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Mary Priestly (~0.92 confidence). The pedigree spans 1 generation with 1 identified ancestor.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Mary Priestly
b. ~1875
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Jones
Spouse · 1940 · age 49 · b. ~1891 · 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-t0627-01526-00284)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Cortlandt Brown | 46 | Head | Manager | Maryland |
| 2 | Mabel Brown | 45 | Wife | Counter-Girl | Virginia |
| 3 | Vincent Decoursey | 46 | Head | Laborer | Maryland |
| 4 | Lilly Decoursey | 38 | Wife | Laundress | Maryland |
| 5 | Henrietta Churchill | 48 | Sister | Cook | Maryland |
| 6 | Harry E. Bennett | 52 | Head | Butler | Maryland |
| 7 | Annie M. Bennett | 50 | Wife | — | Virginia |
| 8 | Harry E. Jr. Bennett | 11 | Son | — | Maryland |
| 9 | Mason W. Bennett | 54 | Brother | Porter | Virginia |
| 10 | Thos. B. Nelson | 49 | Head | Teacher | Georgia |
| 11 | Phoebe R. Nelson | 31 | Wife | — | Maryland |
| 12 | Thos. B. Nelson | 5 | Son | — | Maryland |
| 13 | Carolyn A. Nelson | 2 | Daughter | — | Maryland |
| 14 | Thomas H. Lee | 63 | Head | Preacher | Maryland |
| 15 | Consuelo Lee | 39 | Wife | Teacher | Maryland |
| 16 | Alfonso Lee | 19 | Grandson | — | Maryland |
| 17 | John E. Cole | 47 | Head | Porter | Maryland |
| 18 | Lelia Cole | 47 | Wife | Maid | Virginia |
| 19 | Horace Cole | 40 | Brother | Stevedore | Maryland |
| 20 | Thomas Jones | 51 | Head | Stevedore | Maryland |
| 21 | Mary Jones THIS PERSON | 49 | Wife | — | Maryland |
| 22 | Erma Jones | 21 | Daughter | Maid | Maryland |
| 23 | Mildred Yates | 26 | Daughter | Seamstress | Maryland |
| 24 | Leroy Yates | 25 | Son-in-law | Laborer | Maryland |
| 25 | Venitta Yates | 4 | Daughter | — | Maryland |
| 26 | Barbara X. Yates | 0 | Granddaughter | — | Maryland |
| 27 | Stanley L. Carsley | 48 | Head | Auto Mechanic | Maryland |
| 28 | Corrine Carsley | 45 | Wife | — | Maryland |
| 29 | Elaine Carsley | 18 | Daughter | — | Maryland |
| 30 | Sarah J. Baker | 80 | Mother-in-law | — | New Jersey |
| 31 | George Page | 48 | Head | Medical Doctor | Maryland |
| 32 | Patricia B. Page | 35 | Wife | Teacher | N. Carolina |
| 33 | George C. Page | 17 | Son | — | Maryland |
| 34 | Marguerite T. Page | 15 | Daughter | — | Maryland |
| 35 | Hugh R. Page | 13 | Son | — | Maryland |
| 36 | Charles H. Downs | 76 | Head | Janitor | Maryland |
| 37 | Mary L. Downs | 63 | Wife | — | Maryland |
| 38 | Arthur Sharps | 43 | Head | Truck Driver | Maryland |
| 39 | Christine Sharps | 45 | Wife | Cook | Virginia |
| 40 | Mary F. Turner | 27 | Step-daughter | Nurse | Virginia |
Pedigree Summary
Mary
Gen 1 · 1 parents
~0.92
Max depth 4 (1900–1950 window)
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)