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Frank Mason — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Frank Mason across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1901), then head of a 8-person household.
Age 39
b. ~1901
Male
Head
Born: New York
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Mason |
| Given Name | Frank |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Salesman |
| Industry | Shoe |
| Class of Worker | PW |
| Hours Worked | 3 |
| Income (1939) | 866 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Salesman |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1901 |
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 Frank | Age | Birth yr |
|---|---|---|---|---|
| Bruce Mason | Son | — | ~1940 | |
| Dorothy Mason | Spouse | — | 33 | ~1907 |
| Clifford Mason | Son | — | 12 | ~1928 |
| Winifred Mason | Daughter | — | 15 | ~1925 |
| Jean Mason | Daughter | — | 13 | ~1927 |
| Frank Mason | Head | — | 39 | ~1901 |
| Lois Mason | Daughter | — | 2 | ~1938 |
| Edith Mason | Daughter | — | 7 | ~1933 |
Census Appearances
1930
Cook, Illinois
Head, age 29
Cook, Illinois · implied b. ~1901 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | Frank |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | New York |
| Age at First Marriage | 24 |
| Father's Birthplace | New York |
| Mother's Birthplace | Holland |
| Occupation | Salesman |
| Industry | Live Stock |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 30 |
| Radio Set | R |
| Veteran | No |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Cook-County, Illinois
Head, age 39
Cook-County, Illinois · implied b. ~1901 — 8 household members
| Surname | Mason |
| Given Name | Frank |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Salesman |
| Industry | Shoe |
| Class of Worker | PW |
| Hours Worked | 3 |
| Income (1939) | 866 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
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 Frank Mason across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Frank Mason
Head · 1940 · age 39 · b. ~1901 · Illinois
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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 — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00990-00322)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Alma Coad | 42 | Daughter | Clerical Work | Illinois |
| 2 | John Jacobsen | 51 | Head | Watchmaker | Norway |
| 3 | Emma Jacobsen | 53 | Wife | — | Sweden |
| 4 | William Magnuson | 41 | Head | String Winder | Sweden |
| 5 | Helen Magnuson | 40 | Wife | — | Illinois |
| 6 | Doris Magnuson | 16 | Daughter | — | Illinois |
| 7 | Anna Magnuson | 14 | Daughter | — | Illinois |
| 8 | Norma Magnuson | 12 | Daughter | — | Illinois |
| 9 | Mathilda Olson | 74 | Mother-in-law | — | Sweden |
| 10 | Lillie Anderson | 74 | Head | — | Norway |
| 11 | John Bognar | 52 | Head | Custom Tailor | Norway |
| 12 | Gertrude Bognar | 49 | Wife | — | Norway |
| 13 | Lloyd Bognar | 16 | Son | — | Illinois |
| 14 | Jalmar Haug | 76 | Lodger | Salesman | Norway |
| 15 | Frank Mason THIS PERSON | 39 | Head | Salesman | New York |
| 16 | Dorothy Mason | 33 | Wife | — | Missouri |
| 17 | Winifred Mason | 15 | Daughter | — | Illinois |
| 18 | Jean Mason | 13 | Daughter | — | Illinois |
| 19 | Clifford Mason | 12 | Son | — | Illinois |
| 20 | Edith Mason | 7 | Daughter | — | Illinois |
| 21 | Lois Mason | 2 | Daughter | — | Illinois |
| 22 | Bruce Mason | 0 | Son | — | Illinois |
| 23 | Alvin Herman | 23 | Head | Salesman | Illinois |
| 24 | Ardelia Herman | 23 | Wife | — | Michigan |
| 25 | Anton Reptowski | 35 | Head | Drill Press Opertr | Nebraska |
| 26 | Aluma Reptowski | 36 | Wife | — | Illinois |
| 27 | Laurence Reptowski | 16 | Son | — | Illinois |
| 28 | Richard Reptowski | 11 | Son | — | Illinois |
| 29 | Lorraine Reptowski | 10 | Daughter | — | Illinois |
| 30 | Robert Reptowski | 8 | Son | — | Illinois |
| 31 | Shirley Reptowski | 7 | Daughter | — | Illinois |
| 32 | George Nottke | 46 | Head | Helper | Illinois |
| 33 | Clara Nottke | 47 | Wife | — | Illinois |
| 34 | Elmer Nottke | 19 | Son | New Worker | Illinois |
| 35 | Leona Nottke | 16 | Daughter | — | Illinois |
| 36 | Henry Freimath | 73 | Lodger | Uphol. Worker | Germany |
| 37 | Edward Christman | 33 | Head | Labor | Illinois |
| 38 | Margaret Christman | 33 | Wife | — | Sweden |
| 39 | Margaret Christman | 11 | Daughter | — | Illinois |
| 40 | Florrie Christman | 1 | Daughter | — | Illinois |
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)