RS
Robert Smith — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Robert Smith across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Ralph & Robert — first a son (b.~1903), then head of a 5-person household.
Age 37
b. ~1903
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Smith |
| Given Name | Robert G. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Townsend Center |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Clerical |
| Industry | Post Office |
| Class of Worker | GW |
| Hours Worked | 48 |
| Income (1939) | 956 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Clerical |
| Township / Ward | Townsend Center |
| Est. Birth Year | ~1903 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Robert Smith | Head | — | 70 | ~1870 |
| James Smith | Son | — | 43 | ~1897 |
| John Smith | Son | — | 39 | ~1901 |
| Robert Smith | Son | — | 37 | ~1903 |
| Nellie Smith | Spouse | — | 64 | ~1876 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 17
Middlesex, Massachusetts · implied b. ~1903 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Robert E. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Laborer |
| Industry | Lumber Mill |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Son, age 27
Middlesex, Massachusetts · implied b. ~1903 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Robert L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Salesman |
| Industry | Building materials |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 37
Middlesex-County, Massachusetts · implied b. ~1903 — 5 household members
| Surname | Smith |
| Given Name | Robert G. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Townsend Center |
| 1935 Residence (County) | Middlesex |
| Occupation | Clerical |
| Industry | Post Office |
| Class of Worker | GW |
| Hours Worked | 48 |
| Income (1939) | 956 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 Smith across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Ralph Smith (~0.92 confidence) and father Robert Smith (~0.92 confidence) and father Robert Smith (~0.92 confidence) and mother Ellen Smith (~0.92 confidence) and mother Nellie Smith (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Ralph Smith
b. ~1872
Source father
● Household
· direct · ~0.92
Father
Robert Smith
b. ~1870
Source father
● Household
· direct · ~0.92
Father
Robert Smith
b. ~1870
Source father
● Household
· direct · ~0.92
Mother
Ellen Smith
b. ~1871
Source mother
● Household
· direct · ~0.92
Mother
Nellie Smith
b. ~1876
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Smith
Son · 1940 · age 37 · b. ~1903 · Massachusetts
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Sibling
John Smith
Sibling · 1940 · age 39
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Smith
Sibling · 1940 · age 43
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 — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01618-00182)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ray Makela | 7 | Son | — | Massachusetts |
| 42 | Jean Makela | 3 | Daughter | — | Massachusetts |
| 43 | Joan Makela | 2 | Daughter | — | Massachusetts |
| 44 | Stella S. King | 79 | Head | — | New Hampshire |
| 45 | Lydia Pinkham | 65 | Boarder | — | Massachusetts |
| 46 | William S. Booth | 82 | Head | — | Vermont |
| 47 | Charles A. Wright | 58 | Head | Solution | Massachusetts |
| 48 | Grace Wright | 58 | Wife | — | Massachusetts |
| 49 | Avis Wright | 25 | Daughter | Stenographer | Massachusetts |
| 50 | Nelia Spaulding | 72 | Head | — | New Hampshire |
| 51 | Robert G. Smith | 70 | Head | Postmaster | Massachusetts |
| 52 | Nellie Smith | 64 | Wife | — | Massachusetts |
| 53 | James Smith | 43 | Son | Cemetery Laborer | Massachusetts |
| 54 | John M. Smith | 39 | Son | Laborer | Massachusetts |
| 55 | Robert G. Jr. Smith THIS PERSON | 37 | Son | Clerical | Massachusetts |
| 56 | Stephen S. Allen | 68 | Head | Cooper | Massachusetts |
| 57 | Alice S. Allen | 65 | Wife | — | Massachusetts |
| 58 | Leon Marshal | 40 | Head | Field Engineer | Massachusetts |
| 59 | Ruth Marshal | 38 | Wife | — | Massachusetts |
| 60 | Barbara Marshal | 19 | Daughter | — | Massachusetts |
| 61 | Irving Marshal | 17 | Son | — | Massachusetts |
| 62 | Elaine Marshal | 15 | Daughter | — | Massachusetts |
| 63 | George Marshal | 13 | Son | — | Massachusetts |
| 64 | Nancy Marshal | 11 | Daughter | — | Massachusetts |
| 65 | Priscilla Marshal | 7 | Daughter | — | New Hampshire |
| 66 | Leon Jr. Marshal | 4 | Son | — | Massachusetts |
| 67 | Emma Cook | 71 | Boarding | — | Massachusetts |
| 68 | Emma Eaton | 76 | Head | — | New Hampshire |
| 69 | Emma Eaton | 68 | Head | — | Massachusetts |
| 70 | Chester Eaton | 60 | Boarder | Fireman | Massachusetts |
| 71 | Florence Eaton | 12 | Boarder | — | Massachusetts |
| 72 | Chester Wright | 35 | Head | Engineer | Massachusetts |
| 73 | Edmund Wright | 23 | Brother | Laborer | Massachusetts |
| 74 | Frances Richardson | 32 | Housekeeper | — | Massachusetts |
| 75 | James J. Dudley | 67 | Head | Carpenter | Rhode Island |
| 76 | Carrie Dudley | 57 | Wife | — | Vermont |
| 77 | William Dudley | 22 | Son | Laborer | Massachusetts |
| 78 | Charles Walsh | 42 | Head | Slave | Maine |
| 79 | Nellie Walsh | 31 | Wife | — | Massachusetts |
| 80 | Enid Winks | 31 | Head | Cutting Glass | Massachusetts |
Pedigree Summary
Robert + 2 siblings
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
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)