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 Carrie & Carrie — first a daughter (b.~1915), then head of a 6-person household.
Age 25
b. ~1915
Female
Daughter
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Jones |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Class of Worker | 0 |
| 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 | ~1915 |
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 |
|---|---|---|---|---|
| Josephine Jones | Daughter | — | 14 | ~1926 |
| Aleater Jones | Daughter | — | 16 | ~1924 |
| Mary Jones | Daughter | — | 25 | ~1915 |
| Hilda Jones | Daughter | — | 11 | ~1929 |
| Carrie Jones | Head | — | 44 | ~1896 |
| Thomas Jones | Other | — | 68 | ~1872 |
Census Appearances
1920
Baltimore, Maryland
Daughter, age 4
Baltimore, Maryland · implied b. ~1916 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jones |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Daughter, age 14
Baltimore, Maryland · implied b. ~1916 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jones |
| Given Name | Mary S |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 14 |
| 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 25
Baltimore-City-County, Maryland · implied b. ~1915 — 6 household members
| Surname | Jones |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Class of Worker | 0 |
| 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 Jones across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Carrie Jones (~0.92 confidence) and mother Carrie Jones (~0.92 confidence) and mother Myrtle Jones (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Carrie Jones
b. ~1894
Source mother
● Household
· direct · ~0.92
Mother
Carrie Jones
b. ~1896
Source mother
● Household
· direct · ~0.92
Mother
Myrtle Jones
b. ~1898
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Jones
Daughter · 1940 · age 25 · b. ~1915 · Maryland
★ You are viewing this record
Sibling
Aleater Jones
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Hilda Jones
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Josephine Jones
Sibling · 1940 · age 14
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
39 people indexed on this census page (nara:1940:m-t0627-01534-00100)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Effie Mary Effie | 15 | Daughter | — | Maryland |
| 43 | Fred Owens | 49 | Head | Labor | South Carolina |
| 44 | Marie Owens | 23 | Wife | — | South Carolina |
| 45 | David Owens | 5 | Son | — | South Carolina |
| 46 | Annie M. Owens | 2 | Daughter | — | Maryland |
| 47 | Fred Jr. Owens | 1 | Son | — | Maryland |
| 48 | Charlie Thaston | 48 | Head | Labor | South Carolina |
| 49 | Ruth Bailey | 39 | Lodger | — | North Carolina |
| 50 | Elonzo Felton | 40 | Head | — | Virginia |
| 51 | Pearl Felton | 37 | Wife | — | North Carolina |
| 52 | Samuel Bloomstine | 40 | Head | Manager | Russia |
| 53 | Eva Bloomstine | 42 | Wife | Saleslady | Russia |
| 54 | Ester Bloomstine | 19 | Daughter | — | France |
| 55 | Sylvia Bloomstine | 17 | Daughter | — | Maryland |
| 56 | Minnie Bloomstine | 10 | Daughter | — | Maryland |
| 57 | Betty Bloomstine | 7 | Daughter | — | Maryland |
| 58 | Carrie Jones | 44 | Head | — | Maryland |
| 59 | Mary Jones THIS PERSON | 25 | Daughter | — | Maryland |
| 60 | Aleater Jones | 16 | Daughter | — | Maryland |
| 61 | Josephine Jones | 14 | Daughter | — | Maryland |
| 62 | Hilda Jones | 11 | Daughter | — | Maryland |
| 63 | Thomas H. Jones | 68 | Father | — | Maryland |
| 64 | James Addmond | 46 | Head | Labor | Virginia |
| 65 | Sarah Addmond | 44 | Wife | — | Virginia |
| 66 | Ethel Moise | 28 | Neice | Waitress | Virginia |
| 67 | Margaret Brown | 24 | Neice | — | Virginia |
| 68 | David Robinson | 21 | Grandson | Labor | Maryland |
| 69 | Walter Edmons | 5 | Grandson | — | Maryland |
| 70 | Louis Anthony | 33 | Head | Attendant | Maryland |
| 71 | Lizzie Anthony | 27 | Wife | — | Maryland |
| 72 | Sarah Anthony | 9 | Daughter | — | Maryland |
| 73 | Lilly Anthony | 5 | Daughter | — | Maryland |
| 74 | George Anthony | 3 | Son | — | Maryland |
| 75 | Mildred Anthony | 0 | Daughter | — | Maryland |
| 76 | Booth Wells | 30 | Brother | Labor | Maryland |
| 77 | Lizzie Wells | 29 | Sister | — | Maryland |
| 78 | Ethel Wells | 8 | Neice | — | Maryland |
| 79 | Booth Jr. Wells | 3 | Nephew | — | Maryland |
| 80 | Dasie Lowery | 24 | Lodger | — | Maryland |
Pedigree Summary
Mary + 3 siblings
Gen 1 · 3 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)