RL
Robert Lucas — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Marion-County, Oregon
Our Model Tree links this Robert Lucas across the 1930 and 1940 US Censuses in Marion-County, Oregon (XGBoost, ~Confirmed) — first a son (b.~1919), then head of a 11-person household.
Age 21
b. ~1919
Male
Son
Born: Montana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Oregon |
| Surname | Lucas |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Montana |
| 1935 Residence (City) | Stayton Town |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Occupation | Maintenance Crew |
| Industry | State Highway |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 675 |
| Highest Grade | H 4 |
| 1935 Residence | Same Place |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
| Occupation | Maintenance Crew |
| Township / Ward | Stayton Town |
| Est. Birth Year | ~1919 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Louis Lucas | Son | — | 7 | ~1933 |
| Florence Lucas | Daughter | — | 16 | ~1924 |
| Robert Johnson | Other | — | 2 | ~1938 |
| Rex Lucas | Son | — | 3 | ~1937 |
| Alfred Lucas | Head | — | 45 | ~1895 |
| Essie Lucas | Spouse | — | 46 | ~1894 |
| Dorothy Johnson | Daughter | — | 23 | ~1917 |
| Robert Lucas | Son | — | 21 | ~1919 |
| Mary Lucas | Daughter | — | 20 | ~1920 |
| Margaret Lucas | Daughter | — | 18 | ~1922 |
| Doris Lucas | Daughter | — | 5 | ~1935 |
Census Appearances
1930
Marion, Oregon
Son, age 11
Marion, Oregon · implied b. ~1919 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lucas |
| Given Name | Robert A. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | Montana |
| Mother's Birthplace | Montana |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1940
Marion-County, Oregon
Son, age 21
Marion-County, Oregon · implied b. ~1919 — 11 household members
| Surname | Lucas |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Montana |
| 1935 Residence (City) | Stayton Town |
| 1935 Residence (County) | Marion |
| Occupation | Maintenance Crew |
| Industry | State Highway |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 675 |
| Highest Grade | H 4 |
| 1935 Residence | Same Place |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
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 Lucas across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Lucas
Son · 1940 · age 21 · b. ~1919 · Oregon
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Sibling
Rex Lucas
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Johnson
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Florence Lucas
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Louis Lucas
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Lucas
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Lucas
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Doris Lucas
Sibling · 1940 · age 5
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 — Marion-County, Oregon
Open full size
1940 US Federal Census — Marion-County, Oregon
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03373-00469)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John A Culbertson | 30 | Head | Night Police | Oregon |
| 2 | Bessie Culbertson | 24 | Wife | — | Oregon |
| 3 | Charmie Culbertson | 4 | Daughter | — | Oregon |
| 4 | Lylamae Culbertson | 2 | Daughter | — | Oregon |
| 5 | Gilbert Culbertson | 1 | Son | — | Oregon |
| 6 | Anna Vaughan | 23 | Sister-in-law | Housekeeper | Oregon |
| 7 | John A Van Handel | 72 | Head | Farmer | Wisconsin |
| 8 | Rose Van Handel | 63 | Wife | — | Minnesota |
| 9 | Alfred B Lucas | 45 | Head | — | Montana |
| 10 | Essie Lucas | 46 | Wife | — | Montana |
| 11 | Dorothy Johnson | 23 | Daughter | — | Montana |
| 12 | Robert Lucas THIS PERSON | 21 | Son | Maintenance Crew | Montana |
| 13 | Mary Lucas | 20 | Daughter | Housekeeper | Montana |
| 14 | Margaret Lucas | 18 | Daughter | — | Montana |
| 15 | Florence Lucas | 16 | Daughter | — | Montana |
| 16 | Louis Lucas | 7 | Son | — | Oregon |
| 17 | Doris Lucas | 5 | Daughter | — | Oregon |
| 18 | Rex Lucas | 3 | Son | — | Oregon |
| 19 | Robert Johnson | 2 | Grandson | — | Oregon |
| 20 | Milton Carson | 56 | Head | Farm Laborer | Wisconsin |
| 21 | E. Starr Ruggles | 51 | Head | Turkey Raiser | Oregon |
| 22 | M. Catherine Ruggles | 51 | Wife | — | Oregon |
| 23 | Neal Ruggles | 28 | Son | Farmer | Oregon |
| 24 | June Ruggles | 21 | Daughter-in-law | — | Pennsylvania |
| 25 | George Schlie | 42 | Head | Garage Operator | Wisconsin |
| 26 | Emma Schlie | 36 | Wife | — | Wisconsin |
| 27 | Loretta Schlie | 13 | Daughter | — | Oregon |
| 28 | Louann Schlie | 5 | Daughter | — | Oregon |
| 29 | William A Brenner | 55 | Head | Logger | Oregon |
| 30 | Tempie Brenner | 52 | Wife | — | Oregon |
| 31 | Delpha Brenner | 22 | Daughter | Grade Teacher | Oregon |
| 32 | Martha Lambert | 72 | Mother-in-law | — | Oregon |
| 33 | M. Anna Payton | 88 | Head | — | Virginia |
| 34 | Thomas Goodman | 59 | Lodger | Common Laborer | Oregon |
| 35 | Imilda Robertson | 62 | Daughter | Practical Nurse | Oregon |
| 36 | Fred Berger | 60 | Head | Finisher | Alabama |
| 37 | Louie M. V. Berger | 45 | Wife | — | Oklahoma |
| 38 | Raymond P Berger | 23 | Son | Tractor Driver | Canada |
| 39 | J. Vernon Sinclair | 14 | Foster Son | — | Oregon |
| 40 | George Thomas | 46 | Head | Laborer Road Construction | Wisconsin |
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)