JM
James Mack — 1940 US Census Record
Model Tree available1940 United States Federal Census · Baltimore-County, Maryland
Our Model Tree links this James Mack across the 1920, 1930 and 1940 US Censuses in Baltimore-County, Maryland (XGBoost, ~Confirmed), with identified parents Wesley & Florence — first a son (b.~1911), then head of a 6-person household.
Age 29
b. ~1911
Male
Son
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-County, Maryland |
| Surname | Mack |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Owings Mills |
| 1935 Residence (County) | Baltimore |
| Additional Details | |
| Occupation | Laborer |
| Industry | Garage |
| Class of Worker | PW |
| Hours Worked | 72 |
| Income (1939) | 300 |
| Highest Grade | No 2 |
| 1935 Residence | Same house |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Laborer |
| Township / Ward | Owings Mills |
| Est. Birth Year | ~1911 |
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 James | Age | Birth yr |
|---|---|---|---|---|
| Marguerita Mack | Daughter | — | 18 | ~1922 |
| Levina Mack | Daughter | — | 20 | ~1920 |
| Mary Mack | Spouse | — | 58 | ~1882 |
| James Mack | Son | — | 29 | ~1911 |
| Ruth Mack | Daughter | — | 28 | ~1912 |
| Wesley Mack | Head | — | 60 | ~1880 |
Census Appearances
1920
Baltimore, Maryland
Son, age 8
Baltimore, Maryland · implied b. ~1912 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mack |
| Given Name | James A |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Mulatto |
| Age | 8 |
| 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
Son, age 18
Baltimore, Maryland · implied b. ~1912 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mack |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 18 |
| 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-County, Maryland
Son, age 29
Baltimore-County, Maryland · implied b. ~1911 — 6 household members
| Surname | Mack |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Owings Mills |
| 1935 Residence (County) | Baltimore |
| Occupation | Laborer |
| Industry | Garage |
| Class of Worker | PW |
| Hours Worked | 72 |
| Income (1939) | 300 |
| Highest Grade | No 2 |
| 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 James Mack across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Wesley Mack (~0.92 confidence) and mother Florence Mack (~0.92 confidence) and mother Mary Mack (~0.92 confidence) and mother Mary Mack (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Wesley Mack
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Florence Mack
b. ~1885
Source mother
● Household
· direct · ~0.92
Mother
Mary Mack
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Mary Mack
b. ~1882
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Mack
Son · 1940 · age 29 · b. ~1911 · Maryland
★ You are viewing this record
Sibling
Levina Mack
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marguerita Mack
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Mack
Sibling · 1940 · age 28
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-County, Maryland
Open full size
1940 US Federal Census — Baltimore-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01504-00162)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Robert | 37 | Brother | Laborer | Maryland |
| 42 | Elsie | 34 | Sister | — | Maryland |
| 43 | Priscilla | 69 | Mother | — | Maryland |
| 44 | Charles Von Gunten | 35 | Head | Steel Worker | Ohio |
| 45 | Bessie Von Gunten | 31 | Wife | — | Maryland |
| 46 | Marie Von Gunten | 11 | Daughter | — | Maryland |
| 47 | Marian Von Gunten | 9 | Daughter | — | Maryland |
| 48 | Karl Jr. Von Gunten | 8 | Son | — | Maryland |
| 49 | Edith Von Gunten | 3 | Daughter | — | Maryland |
| 50 | Wesley Mack | 60 | Head | Houseman | Maryland |
| 51 | Mary Mack | 58 | Wife | — | Virginia |
| 52 | Marguerita Mack | 18 | Daughter | — | Maryland |
| 53 | Ruth Mack | 28 | Daughter | Cook | Maryland |
| 54 | Levina Mack | 20 | Daughter | Cook | Maryland |
| 55 | James Mack THIS PERSON | 29 | Son | Laborer | Maryland |
| 56 | Henry Yoy | 68 | Head | Operator | Maryland |
| 57 | Louisa Yoy | 66 | Wife | — | Maryland |
| 58 | Marion Moon | 44 | Head | Laborer | Maryland |
| 59 | Susie Moon | 31 | Wife | — | Maryland |
| 60 | John Moon | 4 | Son | — | Maryland |
| 61 | Katherine Moon | 2 | Daughter | — | Maryland |
| 62 | George Long | 51 | Lodger | Laborer | Virginia |
| 63 | Francis Johnson | 33 | Head | Laborer | Maryland |
| 64 | Edna Johnson | 21 | Wife | — | Maryland |
| 65 | Homer Hubble | 38 | Head | Laborer | Kentucky |
| 66 | Laura Hubble | 39 | Wife | — | Kentucky |
| 67 | Albert Hubble | 16 | Son | Laborer | Kentucky |
| 68 | Edward Hubble | 16 | Son | — | Kentucky |
| 69 | Margaret Hubble | 15 | Daughter | — | Maryland |
| 70 | Clarence Hubble | 14 | Son | — | Maryland |
| 71 | Anna Hubble | 11 | Daughter | — | Maryland |
| 72 | Charlotte Hubble | 7 | Daughter | — | Maryland |
| 73 | Howard Hubble | 5 | Son | — | Maryland |
| 74 | George Senty | 36 | Head | Proprietor | Maryland |
| 75 | Grace Senty | 33 | Wife | Spooler | Maryland |
| 76 | Edith Senty | 16 | Daughter | — | Maryland |
| 77 | Grace Senty | 12 | Daughter | — | Maryland |
| 78 | Robert Triplett | 59 | Head | Weaver | Maryland |
| 79 | Roma Triplett | 54 | Wife | — | Maryland |
| 80 | Howard Triplett | 32 | Son | Laborer | Maryland |
Pedigree Summary
James + 3 siblings
Gen 1 · 4 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)