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James Mason — 1940 US Census Record
Linked across censuses1940 United States Federal Census · St.-Louis-County, Minnesota
Our Model Tree links this James Mason across the 1920, 1930 and 1940 US Censuses in St.-Louis-County, Minnesota (XGBoost, ~Confirmed) — first a head (b.~1885), then head of a 5-person household.
Age 55
b. ~1885
Male
Head
Born: Denmark
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Louis-County, Minnesota |
| Surname | Mason |
| Given Name | James C |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Denmark |
| 1935 Residence (City) | Canosia |
| 1935 Residence (County) | St Louis |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Salesman |
| Industry | Retail Drug Store |
| Class of Worker | OA |
| Hours Worked | 48 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth Country | Denmark |
| Birthplace (normalized) | denmark |
| Occupation | Salesman |
| Township / Ward | Canosia |
| Est. Birth Year | ~1885 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Janet Mason | Daughter | — | 18 | ~1922 |
| James Mason | Head | — | 55 | ~1885 |
| Howard Mason | Son | — | 26 | ~1914 |
| Donald Mason | Son | — | 22 | ~1918 |
| Vera Mason | Spouse | — | 46 | ~1894 |
Census Appearances
1920
St Louis, …
Head, age 35
St Louis, Minnesota · implied b. ~1885 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | James C. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Denmark |
| Year of Immigration | 1905 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Occupation | Salesman |
| Industry | Meat Market |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Danish |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth Country | Denmark |
| Year of Naturalization | 1912 |
| Birthplace (normalized) | denmark |
1930
St Louis, …
Head, age 45
St Louis, Minnesota · implied b. ~1885 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Denmark |
| Naturalization Status | Naturalized |
| Year of Immigration | 1905 |
| Age at First Marriage | 28 |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Occupation | Meat Cutter |
| Industry | Butcher Shop |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Danish |
| Home Owned/Rented | R |
| Home Value / Rent | $28 |
| Radio Set | R |
| Veteran | No |
| Birth Country | Denmark |
| Birthplace (normalized) | denmark |
1940
St.-Louis-County, Minnesota
Head, age 55
St.-Louis-County, Minnesota · implied b. ~1885 — 5 household members
| Surname | Mason |
| Given Name | James C |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Denmark |
| 1935 Residence (City) | Canosia |
| 1935 Residence (County) | St Louis |
| Naturalization Status | Naturalized |
| Occupation | Salesman |
| Industry | Retail Drug Store |
| Class of Worker | OA |
| Hours Worked | 48 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth Country | Denmark |
| Birthplace (normalized) | denmark |
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 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
James Mason
Head · 1940 · age 55 · b. ~1885 · Minnesota
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — St.-Louis-County, Minnesota
Open full size
1940 US Federal Census — St.-Louis-County, Minnesota
Page Contents
32 people indexed on this census page (nara:1940:m-t0627-01955-00301)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Michael S Yatrayall | Yatrayall | 54 | Head | Farmer | Syria |
| 2 | Bessie S Hyggeon | Hyggeon | 31 | Head | Teacher | Wisconsin |
| 3 | Beatrice Isaacson | Isaacson | 23 | Partner | Teacher | Minnesota |
| 4 | Henry Horak | 36 | Head | Proprietor | Minnesota |
| 5 | Violet Horak | 31 | Wife | — | Minnesota |
| 6 | Donald L Horak | 3 | Son | — | Minnesota |
| 7 | David L Horak | 0 | Son | — | Minnesota |
| 8 | Albert Schilling | 40 | Head | Laborer | Minnesota |
| 9 | Camilla Schilling | 42 | Wife | Nurse | Minnesota |
| 10 | Donald Schilling | 4 | Son | — | Minnesota |
| 11 | Wilfred Christianson | 25 | Head | Laborer | Minnesota |
| 12 | Violet Christianson | 22 | Wife | — | Minnesota |
| 13 | Joyce Christianson | 0 | Daughter | — | Minnesota |
| 14 | Kristie Christianson | 67 | Head | — | Norway |
| 15 | Elroy Vaux | 45 | Head | Farmer | Minnesota |
| 16 | Ruby A Vaux | 40 | Wife | — | Wisconsin |
| 17 | Melvin Vaux | 18 | Son | — | Minnesota |
| 18 | Lulu Vaux | 16 | Daughter | — | Minnesota |
| 19 | Florence Vaux | 14 | Daughter | — | Minnesota |
| 20 | Helen Vaux | 10 | Daughter | — | Minnesota |
| 21 | James C Mason THIS PERSON | 55 | Head | Salesman | Denmark |
| 22 | Vera Mason | 46 | Wife | — | Minnesota |
| 23 | Howard Mason | 26 | Son | Driver | Minnesota |
| 24 | Donald Mason | 22 | Son | Laborer | Minnesota |
| 25 | Janet Mason | 18 | Daughter | — | Minnesota |
| 26 | George Jorgenson | 59 | Head | Welder | Minnesota |
| 27 | Anna Jorgenson | 51 | Wife | — | Norway |
| 28 | Morris Jorgenson | 21 | Son | — | Minnesota |
| 29 | Carlo Christianson | 67 | Head | — | Norway |
| 30 | Fred Otto | 70 | Head | — | Wisconsin |
| 31 | Benjamin Mcgillivray | 59 | Head | Switchman | Minnesota |
| 32 | Elma T Bryant | 46 | Housekeeper | Housekeeper | Minnesota |
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)