RM
Robert Mills — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Salt-Lake-County, Utah
Our Model Tree links this Robert Mills across the 1930 and 1940 US Censuses in Salt-Lake-County, Utah (XGBoost, ~Confirmed) — first a son (b.~1927), then head of a 9-person household.
Age 13
b. ~1927
Male
Son
Born: Utah
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Salt-Lake-County, Utah |
| Surname | Mills |
| Given Name | Robert K. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Utah |
| 1935 Residence (City) | Salt Lake City |
| 1935 Residence (County) | Salt Lake |
| Additional Details | |
| Highest Grade | No 5 |
| 1935 Residence | Same Place |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
| Township / Ward | Salt Lake City |
| Est. Birth Year | ~1927 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Lavinia Mills | Daughter | — | 19 | ~1921 |
| Carol Mills | Daughter | — | 17 | ~1923 |
| Betty Mills | Daughter | — | 14 | ~1926 |
| Clarence Mills | Son | — | 17 | ~1923 |
| Robert Mills | Son | — | 13 | ~1927 |
| Irving Mills | Head | — | 53 | ~1887 |
| Jack Mills | Son | — | 11 | ~1929 |
| Jean Mills | Spouse | — | 53 | ~1887 |
| George Mills | Son | — | 32 | ~1908 |
Census Appearances
1930
Salt Lake, …
Son, age 2
Salt Lake, Utah · implied b. ~1928 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mills |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Utah |
| Father's Birthplace | New York |
| Mother's Birthplace | Scotland |
| Can Read/Write | No |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
1940
Salt-Lake-County, Utah
Son, age 13
Salt-Lake-County, Utah · implied b. ~1927 — 9 household members
| Surname | Mills |
| Given Name | Robert K. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Utah |
| 1935 Residence (City) | Salt Lake City |
| 1935 Residence (County) | Salt Lake |
| Highest Grade | No 5 |
| 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 Robert Mills across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Mills
Son · 1940 · age 13 · b. ~1927 · Utah
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Sibling
George Mills
Sibling · 1940 · age 32
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clarence Mills
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jack Mills
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Carol Mills
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lavinia Mills
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Mills
Sibling · 1940 · age 14
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-t0627-04223-00277)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Irene Weir | 9 | Daughter | — | Utah |
| 42 | Harvey Richard Weir | 5 | Son | — | Utah |
| 43 | Marion L. Weir | 2 | Son | — | Utah |
| 44 | Irving H. Mills | 53 | Head | Mechanic | New York |
| 45 | Jean B. Mills | 53 | Wife | — | Scotland |
| 46 | George H. Mills | 32 | Son | — | Utah |
| 47 | Lavinia I. Mills | 19 | Daughter | Stenographer | Utah |
| 48 | Clarence Mills | 17 | Son | — | Utah |
| 49 | Carol Mills | 17 | Daughter | — | Utah |
| 50 | Betty N. Mills | 14 | Daughter | — | Utah |
| 51 | Robert K. Mills THIS PERSON | 13 | Son | — | Utah |
| 52 | Jack H. Mills | 11 | Son | — | Utah |
| 53 | Ann Wicklund | 88 | Head | — | Sweden |
| 54 | Ernell E. Christensen | 24 | Head | Mechanic | Utah |
| 55 | Marion B. Christensen | 22 | Wife | — | Utah |
| 56 | John Leon Johnson | 48 | Head | Salesman | Utah |
| 57 | Gilda E. Johnson | 45 | Wife | — | Illinois |
| 58 | Genevieve E. Johnson | 22 | Daughter | Stenographer | Utah |
| 59 | Laverne Johnson | 20 | Daughter | Clerk | Utah |
| 60 | Clifton Leon Johnson | 18 | Son | — | Utah |
| 61 | Glendon E. Johnson | 16 | Son | — | Utah |
| 62 | Joyce B. Johnson | 13 | Daughter | — | Utah |
| 63 | Marvin M. Johnson | 12 | Son | — | Utah |
| 64 | Franklin Delano Johnson | 6 | Son | — | Utah |
| 65 | William B. Henney | 54 | Head | Supervisor | Ireland |
| 66 | Alice A. Henney | 42 | Wife | — | Utah |
| 67 | Dorothy H. Henney | 17 | Daughter | — | Utah |
| 68 | Bernard Henney | 15 | Son | — | Utah |
| 69 | Gerald F. Henney | 14 | Son | — | Utah |
| 70 | Patricia A. Henney | 12 | Daughter | — | Utah |
| 71 | Jack Shapiro | 57 | Head | Owner & Operator | Rumania |
| 72 | Mollie D. Shapiro | 49 | Wife | — | Rumania |
| 73 | Morris Shapiro | 21 | Son | Laborer | Utah |
| 74 | Samuel Shapiro | 20 | Son | Asst. Mgr. | Utah |
| 75 | Beverly Shapiro | 14 | Daughter | — | Utah |
| 76 | Lewis Henry Drew | 74 | Head | Retired | Illinois |
| 77 | Sylvia M. Drew | 56 | Wife | — | So. Dakota |
| 78 | Clarence E. Drew | 31 | Head | Owner & Operator | Montana |
| 79 | Esther Louise Drew | 26 | Wife | — | Iowa |
| 80 | Carole Elaine Drew | 5 | Daughter | — | Utah |
Related Census Records
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)