RM
Robert Mills — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Washington-County, Maryland
Our Model Tree links this Robert Mills across the 1930 and 1940 US Censuses in Washington-County, Maryland (XGBoost, ~Confirmed) — first a son (b.~1923), then head of a 8-person household.
Age 17
b. ~1923
Male
Son
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Washington-County, Maryland |
| Surname | Mills |
| Given Name | Robert O. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Election District 15 |
| 1935 Residence (County) | Washington |
| Additional Details | |
| Highest Grade | H 1 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Election District 15 |
| Est. Birth Year | ~1923 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Harry Mills | Head | — | 49 | ~1891 |
| Robert Mills | Son | — | 17 | ~1923 |
| Grace Mills | Spouse | — | 45 | ~1895 |
| Wayne Mills | Son | — | 9 | ~1931 |
| Patricia Mills | Daughter | — | 4 | ~1936 |
| Reba Mills | Daughter | — | 13 | ~1927 |
| Eugene Mills | Son | — | 11 | ~1929 |
| Regina Mills | Daughter | — | 5 | ~1935 |
Census Appearances
1930
Washington, Maryland
Son, age 6
Washington, Maryland · implied b. ~1924 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mills |
| Given Name | Robert E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Washington-County, Maryland
Son, age 17
Washington-County, Maryland · implied b. ~1923 — 8 household members
| Surname | Mills |
| Given Name | Robert O. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Election District 15 |
| 1935 Residence (County) | Washington |
| Highest Grade | H 1 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 17 · b. ~1923 · Maryland
★ You are viewing this record
Sibling
Reba Mills
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Mills
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Wayne Mills
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Regina Mills
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eugene Mills
Sibling · 1940 · age 11
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 — Washington-County, Maryland
Open full size
1940 US Federal Census — Washington-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01562-00549)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charles R. Salmon | 2 | Son | — | Maryland |
| 2 | Harry A. Salmon | 1 | Son | — | Maryland |
| 3 | Barly S. Salmon | 69 | Father | — | Pennsylvania |
| 4 | Kathryn L. Salmon | 66 | Mother | — | Pennsylvania |
| 5 | Kenneth C. Vance | 48 | Head | Manager | Pennsylvania |
| 6 | Recha R. Vance | 41 | Wife | — | Maryland |
| 7 | Ray W. Vance | 26 | Son | Farm Hand | Maryland |
| 8 | John L. Vance | 19 | Son | Farm Hand | Maryland |
| 9 | William M. Mills | 76 | Head | Farmer | Maryland |
| 10 | Sarah E. Mills | 70 | Wife | — | Maryland |
| 11 | Harry O. Mills | 49 | Head | Laborer | Maryland |
| 12 | Grace R. Mills | 45 | Wife | — | Maryland |
| 13 | Robert O. Mills THIS PERSON | 17 | Son | — | Maryland |
| 14 | Reba E. Mills | 13 | Daughter | — | Maryland |
| 15 | Eugene H. Mills | 11 | Son | — | Maryland |
| 16 | Wayne E. Mills | 9 | Son | — | Maryland |
| 17 | Regina G. Mills | 5 | Daughter | — | Maryland |
| 18 | Patricia D. Mills | 4 | Daughter | — | Maryland |
| 19 | Vernon J. Mills | 46 | Head | Painter | Maryland |
| 20 | Blanch V. Mills | 45 | Wife | — | Maryland |
| 21 | Roger F. Mills | 24 | Son | Laborer | Maryland |
| 22 | Roland L. Mills | 20 | Son | — | Maryland |
| 23 | Chester V. Mills | 17 | Son | Painter | Maryland |
| 24 | Lucille B. Mills | 13 | Daughter | — | Maryland |
| 25 | Louise M. Leigh | 22 | Daughter | Nurse | Maryland |
| 26 | Delores M. Leigh | 2 | Granddaughter | — | Maryland |
| 27 | Alva E. Webbs | 59 | Head | — | Maryland |
| 28 | John W. Webbs | 27 | Son | Laborer | Maryland |
| 29 | Ruth E. Webbs | 26 | Daughter-in-law | — | Pennsylvania |
| 30 | John E. Webbs | 6 | Grandson | — | Maryland |
| 31 | William L. Webbs | 1 | Grandson | — | Maryland |
| 32 | Eleanor J. Webbs | 15 | Granddaughter | — | Maryland |
| 33 | William C. Smith | 71 | Head | Farmer | Virginia |
| 34 | Edith G. Smith | 47 | Wife | — | Pennsylvania |
| 35 | Mildred L. Smith | 18 | Daughter | — | West Virginia |
| 36 | Rosalee J. Smith | 13 | Daughter | — | Maryland |
| 37 | Elmer E. Smith | 9 | Nephew | — | Maryland |
| 38 | Lela E. Miller | 58 | Head | — | Maryland |
| 39 | Thomas W. Shives | 90 | Father | — | Maryland |
| 40 | O. Butler Frank | 49 | Son | — | Maryland |
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)