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Robert Olson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Robert Olson across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1921), then head of a 7-person household.
Age 19
b. ~1921
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Olson |
| Given Name | Robert E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Auburn city |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Lithographer |
| Industry | Sign Company |
| Class of Worker | PW |
| Hours Worked | 26 |
| Income (1939) | 310 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Lithographer |
| Township / Ward | Auburn City |
| Est. Birth Year | ~1921 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Warren Olson | Son | — | 30 | ~1910 |
| Albin Olson | Head | — | 53 | ~1887 |
| Doris Olson | Daughter | — | 17 | ~1923 |
| John Olson | Son | — | 4 | ~1936 |
| Robert Olson | Son | — | 19 | ~1921 |
| Betty Olson | Daughter | — | 14 | ~1926 |
| Marie Olson | Spouse | — | 40 | ~1900 |
Census Appearances
1930
Middlesex, Massachusetts
Son, age 9
Middlesex, Massachusetts · implied b. ~1921 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olson |
| Given Name | Robert E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 19
Middlesex-County, Massachusetts · implied b. ~1921 — 7 household members
| Surname | Olson |
| Given Name | Robert E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Auburn city |
| 1935 Residence (County) | Middlesex |
| Occupation | Lithographer |
| Industry | Sign Company |
| Class of Worker | PW |
| Hours Worked | 26 |
| Income (1939) | 310 |
| Highest Grade | 8 |
| 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 Olson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Olson
Son · 1940 · age 19 · b. ~1921 · Massachusetts
★ You are viewing this record
Sibling
Betty Olson
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Doris Olson
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Warren Olson
Sibling · 1940 · age 30
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Olson
Sibling · 1940 · age 4
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-t0627-01622-00833)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Alice Brine | 14 | Daughter | — | Massachusetts |
| 2 | Donald Brine | 10 | Son | — | Massachusetts |
| 3 | William Mchatchy | 26 | Head | Instrument Maker | Massachusetts |
| 4 | Velma Q. Mchatchy | 25 | Wife | — | Massachusetts |
| 5 | William Mchatchy | 13 | Son | — | Massachusetts |
| 6 | Martha Mchatchy | 12 | Daughter | — | Massachusetts |
| 7 | Paul Mchatchy | 10 | Son | — | Massachusetts |
| 8 | Charles Mchatchy | 9 | Son | Repair Man | Canada-English |
| 9 | David Lundin | 56 | Head | Tinsmith | Sweden |
| 10 | Hilda M. Lundin | 57 | Wife | — | Sweden |
| 11 | Margaret Lundin | 17 | Daughter | — | Massachusetts |
| 12 | Albin G. A. Olson | 53 | Head | Meter Tester | Sweden |
| 13 | Marie E. Olson | 40 | Wife | — | Massachusetts |
| 14 | Warren A. Olson | 30 | Son | Lithographer | Massachusetts |
| 15 | Robert E. Olson THIS PERSON | 19 | Son | Lithographer | Massachusetts |
| 16 | Doris H. Olson | 17 | Daughter | — | Massachusetts |
| 17 | Betty M. Olson | 14 | Daughter | — | Massachusetts |
| 18 | John K. Olson | 4 | Son | — | Massachusetts |
| 19 | Roger S. Beattie | 41 | Head | — | Massachusetts |
| 20 | Beulah M. Beattie | 33 | Wife | — | Massachusetts |
| 21 | David Beattie | 10 | Son | — | Massachusetts |
| 22 | Bradford Beattie | 8 | Son | — | Massachusetts |
| 23 | Merrill Beattie | 5 | Son | — | Massachusetts |
| 24 | James J. Mace | 30 | Head | Stationary Engineer | Massachusetts |
| 25 | Margaret Mace | 27 | Wife | — | Massachusetts |
| 26 | Lorraine Mace | 7 | Daughter | — | Massachusetts |
| 27 | James J. Mace | 6 | Son | — | Massachusetts |
| 28 | Carol A. Mace | 5 | Daughter | — | Massachusetts |
| 29 | Gerald P. Mace | 3 | Son | — | Massachusetts |
| 30 | Arlene L. Mace | 1 | Daughter | 0 | Massachusetts |
| 31 | Joseph Mchugh | 25 | Head | Chauffeur | Massachusetts |
| 32 | Edith Mchugh | 23 | Wife | — | Massachusetts |
| 33 | Joseph W. Mchugh | 1 | Son | 0 | Massachusetts |
| 34 | Josiah H. Appley | 56 | Head | Metal Weatherstripper | Massachusetts |
| 35 | Ella P. Appley | 55 | Wife | — | Massachusetts |
| 36 | Myrtle F. Appley | 27 | Daughter | Typist | Massachusetts |
| 37 | Gardner H. Appley | 20 | Son | Gear And Tool Company | Massachusetts |
| 38 | Carl M. F. Peterson | 33 | Head | Engineering School | Massachusetts |
| 39 | Richard Graham | 63 | Head | Helper | Irish Free State |
| 40 | Mary I. Graham | 56 | Wife | — | Canada-English |
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)