TS
Thomas Simpson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Salt-Lake-County, Utah
Our Model Tree links this Thomas Simpson across the 1930 and 1940 US Censuses in Salt-Lake-County, Utah (XGBoost, ~Confirmed) — first a son (b.~1917), then head of a 7-person household.
Age 23
b. ~1917
Male
Son
Born: Utah
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Salt-Lake-County, Utah |
| Surname | Simpson |
| Given Name | Thomas O. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Utah |
| 1935 Residence (City) | Salt Lake City |
| 1935 Residence (County) | Salt Lake |
| Additional Details | |
| Occupation | Mechanic |
| Industry | S. L. Stamp Co |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 746 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
| Occupation | Mechanic |
| Township / Ward | Salt Lake City |
| Est. Birth Year | ~1917 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Thomas | Age | Birth yr |
|---|---|---|---|---|
| Ronald Simpson | Son | — | 15 | ~1925 |
| Kate Simpson | Spouse | — | 43 | ~1897 |
| Carol Simpson | Daughter | — | 12 | ~1928 |
| Dorothy Simpson | Daughter | — | 17 | ~1923 |
| Thomas Simpson | Son | — | 23 | ~1917 |
| Harry Simpson | Son | — | 20 | ~1920 |
| Lorenzo Simpson | Head | — | 46 | ~1894 |
Census Appearances
1930
Salt Lake, …
Son, age 13
Salt Lake, Utah · implied b. ~1917 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Simpson |
| Given Name | Thomas D. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Utah |
| Father's Birthplace | Utah |
| Mother's Birthplace | Utah |
| Can Read/Write | Yes |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
1940
Salt-Lake-County, Utah
Son, age 23
Salt-Lake-County, Utah · implied b. ~1917 — 7 household members
| Surname | Simpson |
| Given Name | Thomas O. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Utah |
| 1935 Residence (City) | Salt Lake City |
| 1935 Residence (County) | Salt Lake |
| Occupation | Mechanic |
| Industry | S. L. Stamp Co |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 746 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
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 Thomas Simpson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Thomas Simpson
Son · 1940 · age 23 · b. ~1917 · Utah
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Sibling
Carol Simpson
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harry Simpson
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ronald Simpson
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Simpson
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Salt-Lake-County, Utah
Open full size
1940 US Federal Census — Salt-Lake-County, Utah
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04224-00083)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Hedda Johnson | 47 | Wife | — | Utah |
| 42 | Ruth G. Johnson | 22 | Daughter | Mailing Clerk | Utah |
| 43 | Helen Carrie Johnson | 16 | Daughter | — | Utah |
| 44 | Lawrence A. Johnson | 14 | Son | — | Utah |
| 45 | Eugene O'Leary | 43 | Head | Laborer | Utah |
| 46 | Josephine O'Leary | 39 | Wife | — | Utah |
| 47 | Rawlin O'Leary | 17 | Son | — | Utah |
| 48 | Lamar O'Leary | 9 | Son | — | Utah |
| 49 | Melvin May | 34 | Head | Mechanic | Utah |
| 50 | Edna May | 34 | Wife | — | Utah |
| 51 | Jolene May | 10 | Daughter | — | Utah |
| 52 | Jerry May | 5 | Son | — | Utah |
| 53 | Janet May | 3 | Daughter | — | Utah |
| 54 | Francis Dayton | 84 | Head | — | Utah |
| 55 | Isabell Dayton | 82 | Wife | — | Utah |
| 56 | C. E. Lauritzen | 81 | Head | — | Denmark |
| 57 | Charles Harrell | 62 | Head | Switchman | Missouri |
| 58 | Elizabeth Harrell | 58 | Wife | — | Tenn. |
| 59 | Orson Thomson | 84 | Head | — | England |
| 60 | Lydia J. Thomson | 72 | Wife | — | Idaho |
| 61 | Thomas Baggley | 75 | Head | — | England |
| 62 | Charlotte Baggley | 62 | Wife | — | Utah |
| 63 | Emerson Baggley | 22 | Son | — | Utah |
| 64 | Lorenzo Simpson | 46 | Head | Office Manager | Utah |
| 65 | Kate Simpson | 43 | Wife | — | Utah |
| 66 | Thomas O. Simpson THIS PERSON | 23 | Son | Mechanic | Utah |
| 67 | Harry George Simpson | 20 | Son | Order Clerk | Utah |
| 68 | Dorothy Jane Simpson | 17 | Daughter | — | Utah |
| 69 | Ronald Jay Simpson | 15 | Son | — | Utah |
| 70 | Carol Ermina Simpson | 12 | Daughter | — | Utah |
| 71 | Dirk Broem | 54 | Head | Carpenter | Holland |
| 72 | Gertrude Broem | 46 | Wife | — | Holland |
| 73 | Dirk Jr. Broem | 26 | Son | Meat Packer | Holland |
| 74 | Ella Broem | 20 | Daughter | — | Holland |
| 75 | Stanley Broem | 11 | Son | — | Utah |
| 76 | Daniel Janson | 16 | Step son | — | Holland |
| 77 | Niels Sorenson | 69 | Head | — | Denmark |
| 78 | Nora Sorenson | 63 | Wife | — | Denmark |
| 79 | Clarence Miller | 36 | Head | Electric Plater | Utah |
| 80 | Geneva Miller | 30 | Wife | — | Utah |
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)