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Joseph Mason — 1940 US Census Record
Model Tree available1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this Joseph Mason across the 1920, 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed), with identified parents Joseph & Emma — first a head (b.~1909), then head of a 8-person household.
Age 31
b. ~1909
Male
Head
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Mason |
| Given Name | Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Occupation | Janitor |
| Industry | W.P.A. |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 634 |
| Highest Grade | No 6 |
| 1935 Residence | Same house |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Janitor |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1909 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Joseph | Age | Birth yr |
|---|---|---|---|---|
| Emma Mason | Other | — | 56 | ~1884 |
| James Mason | Son | — | 7 | ~1933 |
| Rudolph Mason | Son | — | 3 | ~1937 |
| Sylvia Mason | Daughter | — | 1 | ~1939 |
| Charlotte Mason | Daughter | — | 5 | ~1935 |
| Charles Mason | Son | — | 9 | ~1931 |
| Burnell Mason | Spouse | — | 25 | ~1915 |
| Joseph Mason | Head | — | 31 | ~1909 |
Census Appearances
1920
Baltimore, Maryland
Son, age 11
Baltimore, Maryland · implied b. ~1909 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | Joseph R Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | North Carolina |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Son, age 22
Baltimore, Maryland · implied b. ~1908 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Stevedore |
| Industry | Wharf |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Head, age 31
Baltimore-City-County, Maryland · implied b. ~1909 — 8 household members
| Surname | Mason |
| Given Name | Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Occupation | Janitor |
| Industry | W.P.A. |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 634 |
| Highest Grade | No 6 |
| 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 Joseph Mason across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Joseph Mason (~0.92 confidence) and mother Emma Mason (~0.92 confidence) and mother Marjorie Mason (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Joseph Mason
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Emma Mason
b. ~1881
Source mother
● Household
· direct · ~0.92
Mother
Marjorie Mason
b. ~1883
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Joseph Mason
Head · 1940 · age 31 · b. ~1909 · 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-t0627-01526-00620)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William Gaither | 40 | Head | — | Maryland |
| 2 | Mary Gaither | 39 | Wife | Maid | Pennsylvania |
| 3 | Alice Gaither | 20 | daughter | Maid | Maryland |
| 4 | William Gaither | 18 | son | Boot Black | Maryland |
| 5 | Margaret Gaither | 14 | daughter | — | Maryland |
| 6 | Mildred Gaither | 10 | daughter | — | Maryland |
| 7 | Geraldine Gaither | 9 | daughter | — | Maryland |
| 8 | Lucinda Davis | 39 | Head | General Housework | Virginia |
| 9 | Bernard M. Davis | 2 | son | — | Maryland |
| 10 | Tom Wood Johnson | 14 | Brother | — | Maryland |
| 11 | Bessie Dorsey | 44 | Head | Maid | Maryland |
| 12 | Mildred Dorsey | 17 | daughter | — | Maryland |
| 13 | Rachel Dorsey | 16 | daughter | — | Maryland |
| 14 | Richard Jr. Dorsey | 19 | son | — | Maryland |
| 15 | Henry Hull | 49 | Son | Labourer | Maryland |
| 16 | John Denmark | 60 | Head | — | Maryland |
| 17 | Harry Denmark | 41 | Son | Junk Dealer | Maryland |
| 18 | Hazel Denmark | 25 | daughter | Maid | Maryland |
| 19 | Joseph Mason THIS PERSON | 31 | Head | Janitor | Maryland |
| 20 | Burnell Mason | 25 | Wife | Housewife | Virginia |
| 21 | Charles Mason | 9 | son | — | Maryland |
| 22 | James Mason | 7 | son | — | Maryland |
| 23 | Charlotte Mason | 5 | daughter | — | Maryland |
| 24 | Rudolph Mason | 3 | son | — | Maryland |
| 25 | Sylvia Mason | 1 | daughter | — | Maryland |
| 26 | Emma Mason | 56 | Grandmother | Laundress | Maryland |
| 27 | Adam Byrd | 60 | Head | Contractor | Virginia |
| 28 | William Parr | 33 | Lodger | Contractor | Maryland |
| 29 | Annie Mason | 44 | Head | Cook | Virginia |
| 30 | James E. Mason | 36 | Husband | Chauffeur | Maryland |
| 31 | Charles Chase | 37 | Lodger | Janitor | Maryland |
| 32 | Edward Brooks | 45 | Head | Labourer | Maryland |
| 33 | Bettye Brooks | 48 | Wife | Housewife | Maryland |
| 34 | Evelyn Brooks | 19 | daughter | Maid | Maryland |
| 35 | Arthur A. Rusk | 59 | Head | Collector | Virginia |
| 36 | Daniel Jones | 56 | Lodger | Contractor | Virginia |
| 37 | Francis Thompson | 39 | Head | Labourer | Virginia |
| 38 | Mattie Brown | 38 | Lodger | Maid | Virginia |
| 39 | Louise Smith | 19 | Lodger daughter | Maid | Virginia |
| 40 | Francis Smith | 8 | daughter | — | Maryland |
Pedigree Summary
Joseph
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)