JM
John Mason — 1940 US Census Record
Model Tree available1940 United States Federal Census · Baltimore-County, Maryland
Our Model Tree links this John Mason across the 1900, 1910, 1920, 1930 and 1940 US Censuses in Baltimore-County, Maryland (XGBoost, ~Confirmed), with identified parents Henrietta & Dallas — first a head (b.~1894), then head of a 4-person household.
Age 46
b. ~1894
Male
Head
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-County, Maryland |
| Surname | Mason |
| Given Name | John A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Towson |
| 1935 Residence (County) | Baltimore |
| Additional Details | |
| Occupation | Gardener |
| Industry | Private house |
| Class of Worker | PW |
| Hours Worked | 36 |
| Income (1939) | 280 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Gardener |
| Township / Ward | Towson |
| Est. Birth Year | ~1894 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Bernice Mason | Daughter | — | 12 | ~1928 |
| John Mason | Head | — | 46 | ~1894 |
| Cornelius Mason | Son | — | 13 | ~1927 |
| Marie Mason | Spouse | — | 45 | ~1895 |
Census Appearances
1900
Baltimore, Maryland
Son, age 13
Baltimore, Maryland · implied b. ~1887 — 14 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Maryland |
| Birth Month | Nov |
| Birth Year | 1887 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Messenger |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
Son, age 18
Baltimore, Maryland · implied b. ~1892 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Laborer |
| Industry | Contractor |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1920
Baltimore, Maryland
Head, age 29
Baltimore, Maryland · implied b. ~1891 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | John A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Laborer |
| Industry | Bakery |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Head, age 39
Baltimore, Maryland · implied b. ~1891 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | John H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 19 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Laborer |
| Industry | Machine Mfg. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 25 |
| Radio Set | R |
| Veteran | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-County, Maryland
Head, age 46
Baltimore-County, Maryland · implied b. ~1894 — 4 household members
| Surname | Mason |
| Given Name | John A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Towson |
| 1935 Residence (County) | Baltimore |
| Occupation | Gardener |
| Industry | Private house |
| Class of Worker | PW |
| Hours Worked | 36 |
| Income (1939) | 280 |
| Highest Grade | No 7 |
| 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 John Mason across 5 US Census years (1900, 1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Henrietta Mason (~0.92 confidence) and father Dallas Mason (~0.92 confidence) and mother Edith Mason (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Henrietta Mason
b. ~1855
Source mother
● Household
· direct · ~0.92
Father
Dallas Mason
b. ~1860
Source father
● Household
· direct · ~0.92
Mother
Edith Mason
b. ~1863
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Mason
Head · 1940 · age 46 · b. ~1894 · 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-County, Maryland
Open full size
1940 US Federal Census — Baltimore-County, Maryland
Page Contents
30 people indexed on this census page (nara:1940:m-t0627-01505-00256)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Samuel Jr. Williams | 33 | Son | Laborer | Maryland |
| 42 | Fannie Rose | 69 | Head | Cook | Virginia |
| 43 | Henry Rose | 31 | Son | Gardener | Maryland |
| 44 | Ida Rose | 25 | Wife | — | Maryland |
| 45 | Henry Jr. Rose | 9 | Grandson | — | Maryland |
| 46 | Ernestine Rose | 6 | Granddaughter | — | Maryland |
| 47 | John A. Mason THIS PERSON | 46 | Head | Gardener | Maryland |
| 48 | Marie Mason | 45 | Wife | Cook | Maryland |
| 49 | Cornelius Mason | 13 | Son | — | Maryland |
| 50 | Bernice Mason | 12 | Daughter | — | Maryland |
| 51 | Lelara Smith | 70 | Head | — | Maryland |
| 52 | Harriet Smith | 44 | Daughter | Housework | Maryland |
| 53 | Bessie Smith | 42 | Daughter | Laundress | Maryland |
| 54 | Roosevelt Smith | 40 | Son | Laborer | Maryland |
| 55 | Leonard Smith | 33 | Son | Laborer | Maryland |
| 56 | Mabel Smith | 32 | Daughter-in-law | — | Maryland |
| 57 | Alice Smith | 30 | Daughter | — | Maryland |
| 58 | Vernell Smith | 26 | Grandson | Laborer | Maryland |
| 59 | Thelma Jenkins | 26 | Daughter | — | Maryland |
| 60 | Romaine Jenkins | 2 | Granddaughter | — | Maryland |
| 61 | James Green | 22 | Boarder | Errand Boy | Maryland |
| 62 | Stanton Green | 14 | Grandson | — | Maryland |
| 63 | Curtis Jr. Oliver | 10 | Grandson | — | Maryland |
| 64 | Rosalee Oliver | 8 | Granddaughter | — | Maryland |
| 65 | Violet M. Taylor | 30 | Head | School Teacher | Maryland |
| 66 | Corinne Taylor | 24 | Sister | Substitute Teacher | Maryland |
| 67 | Joseph Garner | 58 | Lodger | Preacher | Maryland |
| 68 | Sadie Garner | 48 | Lodger | — | Maryland |
| 69 | John Blake | 50 | Head | Porter | Maryland |
| 70 | Fannie Blake | 50 | Wife | — | North Carolina |
Related Census Records
Pedigree Summary
John
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)