JM
James Mason — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Walworth-County, Wisconsin
Our Model Tree links this James Mason across the 1910, 1920, 1930 and 1940 US Censuses in Walworth-County, Wisconsin (XGBoost, ~Confirmed) — first a head (b.~1879), then head of a 3-person household.
Age 61
b. ~1879
Male
Head
Born: Wisconsin
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Walworth-County, Wisconsin |
| Surname | Mason |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 61 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Elkhorn City |
| 1935 Residence (County) | Walworth |
| Additional Details | |
| Occupation | Real Estate Salesman |
| Industry | Own Office |
| Class of Worker | OA |
| Hours Worked | 48 |
| Income (1939) | 276 |
| Highest Grade | H 1 |
| 1935 Residence | Same place |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
| Occupation | Real Estate Salesman |
| Township / Ward | Elkhorn City |
| Est. Birth Year | ~1879 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| James Mason | Head | — | 61 | ~1879 |
| Laurence Mason | Son | — | 25 | ~1915 |
| Josephine Mason | Spouse | — | 57 | ~1883 |
Census Appearances
1910
Walworth, Wisconsin
Head, age 33
Walworth, Wisconsin · implied b. ~1877 — 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 | 33 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| Years Married | 7 |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Occupation | Farmer |
| Industry | General Farm |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1920
Walworth, Wisconsin
Head, age 42
Walworth, Wisconsin · implied b. ~1878 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Occupation | Farmer |
| Industry | Dairy Farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Norwegian |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1930
Walworth, Wisconsin
Head, age 52
Walworth, Wisconsin · implied b. ~1878 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| Age at First Marriage | 24 |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Occupation | Sheriff |
| Industry | Walworth County |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 45 |
| Radio Set | R |
| Veteran | No |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1940
Walworth-County, Wisconsin
Head, age 61
Walworth-County, Wisconsin · implied b. ~1879 — 3 household members
| Surname | Mason |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 61 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Elkhorn City |
| 1935 Residence (County) | Walworth |
| Occupation | Real Estate Salesman |
| Industry | Own Office |
| Class of Worker | OA |
| Hours Worked | 48 |
| Income (1939) | 276 |
| Highest Grade | H 1 |
| 1935 Residence | Same place |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
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 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
James Mason
Head · 1940 · age 61 · b. ~1879 · Wisconsin
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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 — Walworth-County, Wisconsin
Open full size
1940 US Federal Census — Walworth-County, Wisconsin
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04531-00537)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Joseph G. Walters | 57 | Head | Salesman | Michigan |
| 2 | Anna Walters | 54 | Wife | — | Michigan |
| 3 | Joseph Walters | 13 | Son | — | Wisconsin |
| 4 | Mabel Hughes | 48 | Head | Insurance Agent | Wisconsin |
| 5 | John Hughes | 19 | Son | Insurance Salesman | Wisconsin |
| 6 | James Mason THIS PERSON | 61 | Head | Real Estate Salesman | Wisconsin |
| 7 | Josephine Mason | 57 | Wife | — | Wisconsin |
| 8 | Laurence Mason | 25 | Son | Proprietor | Wisconsin |
| 9 | Henry Lundstrom | 41 | Head | Repair Man | Illinois |
| 10 | Jeanne Lundstrom | 22 | Wife | — | Illinois |
| 11 | Harry Karp | 30 | Head | Proprietor | Wisconsin |
| 12 | Dorothy J. Karp | 26 | Wife | Saleswoman | Wisconsin |
| 13 | Daniel F. Kelliher | 57 | Head | Theatre Mgr. | Wisconsin |
| 14 | Louella Kelliher | 49 | Wife | — | Wisconsin |
| 15 | Kenneth Goodrich | 38 | Head | Cashier | Wisconsin |
| 16 | Helene Goodrich | 32 | Wife | — | Wisconsin |
| 17 | Kenneth Paul Goodrich | 6 | Son | — | Wisconsin |
| 18 | Michael Peter Goodrich | 4 | Son | — | Wisconsin |
| 19 | Ray Wilcox | 58 | Head | General Labor | Wisconsin |
| 20 | Stella Wilcox | 59 | Wife | — | Wisconsin |
| 21 | Roy Mccabe | 40 | Head | Postal Clerk | Wisconsin |
| 22 | Nellie Mccabe | 38 | Wife | — | Wisconsin |
| 23 | Robert Mccabe | 12 | Son | — | Wisconsin |
| 24 | Charles Earl Wilson | 47 | Head | Atty At Law | Illinois |
| 25 | Lora L. Wilson | 43 | Wife | — | Wisconsin |
| 26 | Ralph Collins | 32 | Head | Meat Cutter | Wisconsin |
| 27 | Lema Collins | 32 | Wife | — | Wisconsin |
| 28 | Carol Collins | 9 | Daughter | — | Wisconsin |
| 29 | James Collins | 8 | Son | — | Wisconsin |
| 30 | Robert Collins | 4 | Son | — | Wisconsin |
| 31 | Patricia Collins | 1 | Daughter | — | Wisconsin |
| 32 | Genevieve Pope | 49 | Head | — | Wisconsin |
| 33 | William Pope | 21 | Son | Waiter | Wisconsin |
| 34 | Robert Pope | 16 | Son | — | Wisconsin |
| 35 | Edward Deno | 45 | Head | Pharmacist | Wisconsin |
| 36 | Matilda Marie Deno | 43 | Wife | Clerk, Sales | Wisconsin |
| 37 | Robert Deno | 20 | Son | Surveyor | Wisconsin |
| 38 | Philip Deno | 18 | Son | Survey Worker | Wisconsin |
| 39 | Gilbert Church | 36 | Head | Manager | Wisconsin |
| 40 | Virginia Church | 29 | Wife | — | Wisconsin |
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)