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John Mason — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Calvert-County, Maryland
Our Model Tree links this John Mason across the 1920, 1930 and 1940 US Censuses in Calvert-County, Maryland (XGBoost, ~Confirmed) — first a head (b.~1873), then head of a 4-person household.
Age 67
b. ~1873
Male
Head
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Calvert-County, Maryland |
| Surname | Mason |
| Given Name | John S |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 67 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Solomon's Island |
| 1935 Residence (County) | Calvert Maryland |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Highest Grade | No 5 |
| 1935 Residence | Same House |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Farmer |
| Township / Ward | Solomons Island |
| Est. Birth Year | ~1873 |
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 |
|---|---|---|---|---|
| John Mason | Head | — | 67 | ~1873 |
| Blondel Mason | Son | — | 22 | ~1918 |
| Lawrence Mason | Son | — | 24 | ~1916 |
| Augusta Mason | Spouse | — | 57 | ~1883 |
Census Appearances
1920
Calvert, Maryland
Head, age 46
Calvert, Maryland · implied b. ~1874 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Farm Laborer |
| Industry | Working out |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Calvert, Maryland
Head, age 54
Calvert, Maryland · implied b. ~1876 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | John P. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 28 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 1000 |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Calvert-County, Maryland
Head, age 67
Calvert-County, Maryland · implied b. ~1873 — 4 household members
| Surname | Mason |
| Given Name | John S |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 67 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Solomon's Island |
| 1935 Residence (County) | Calvert Maryland |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Highest Grade | No 5 |
| 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 John Mason across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Mason
Head · 1940 · age 67 · b. ~1873 · 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 — Calvert-County, Maryland
Open full size
1940 US Federal Census — Calvert-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01543-00078)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Howard S Humphreys | 52 | Head | Farmer | Maryland |
| 2 | Catherine Humphreys | 46 | Wife | — | Maryland |
| 3 | Roy Humphreys | 16 | Son | Laborer | Maryland |
| 4 | Robert Humphreys | 14 | Son | Laborer | Maryland |
| 5 | Kenneth Humphreys | 12 | Son | — | Maryland |
| 6 | Mary E Humphreys | 8 | Daughter | — | Maryland |
| 7 | Floyd Bowen | 43 | Head | Foreman | Maryland |
| 8 | Elizabeth Bowen | 40 | Wife | — | Maryland |
| 9 | Lila D Bowen | 20 | Daughter | Stenographer | Maryland |
| 10 | Nina Bowen | 16 | Daughter | — | Maryland |
| 11 | Celeste Bowen | 14 | Daughter | — | Maryland |
| 12 | Lloyd R Bowen | 12 | Son | — | Maryland |
| 13 | Joseph D Bowen | 73 | Head | Farmer | Maryland |
| 14 | Mary A Bowen | 60 | Wife | — | Maryland |
| 15 | Joseph Bowen | 22 | Son | Laborer | Maryland |
| 16 | Philip Bowen | 19 | Son | Laborer | Maryland |
| 17 | Morgan Bowen | 17 | Son | Laborer | Maryland |
| 18 | Chester Bowen | 16 | Son | Laborer | Maryland |
| 19 | Harry S Thomas | 68 | Head | Waterman | Maryland |
| 20 | John W Brown | 60 | Head | Laborer | Maryland |
| 21 | Annie Brown | 40 | Wife | — | Maryland |
| 22 | John Brown | 18 | Son | Laborer | Maryland |
| 23 | Richard Brown | 17 | Son | Laborer | Maryland |
| 24 | Letha Brown | 13 | Daughter | — | Maryland |
| 25 | Georgie Brown | 11 | Daughter | — | Maryland |
| 26 | Rosie Marie Brown | 6 | Gr-daughter | — | Maryland |
| 27 | John S Mason THIS PERSON | 67 | Head | Farmer | Maryland |
| 28 | Augusta Mason | 57 | Wife | Laundress | Maryland |
| 29 | Lawrence Mason | 24 | Son | Oyster Shucker | Maryland |
| 30 | Blondel Mason | 22 | Son | Oyster Shucker | Maryland |
| 31 | George Mills | 37 | Head | Laborer | Maryland |
| 32 | Mabel Mills | 27 | Wife | Cook | Maryland |
| 33 | Mary Curtis | 68 | Head | — | Maryland |
| 34 | Benjamin Curtis | 45 | Son | Laborer | Maryland |
| 35 | Walter Curtis | 25 | Son | Laborer | Maryland |
| 36 | Louise S Reynolds | 34 | Daughter | Laundress | Maryland |
| 37 | Rosetta Reynolds | 11 | Gr-daughter | — | Maryland |
| 38 | Ernest Jr Reynolds | 5 | Gr-son | — | Maryland |
| 39 | Harry Hawkins | 36 | Head | Assistant Clerk Of Court | Maryland |
| 40 | Alma S Hawkins | 34 | Wife | — | Maryland |
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)