WC
William Carlson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Worcester-County, Massachusetts
Our Model Tree links this William Carlson across the 1930 and 1940 US Censuses in Worcester-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1919), then head of a 12-person household.
Age 21
b. ~1919
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Worcester-County, Massachusetts |
| Surname | Carlson |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Worcester city |
| 1935 Residence (County) | Worcester |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Worcester City |
| 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.
12 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Charles Carlson | Son | — | 2 | ~1938 |
| Doris Carlson | Daughter | — | 14 | ~1926 |
| William Carlson | Son | — | 21 | ~1919 |
| John Carlson | Son | — | 9 | ~1931 |
| Bernice Carlson | Daughter | — | 10 | ~1930 |
| Geraldine Carlson | Daughter | — | 12 | ~1928 |
| Florence Carlson | Daughter | — | 16 | ~1924 |
| Elmer Carlson | Son | — | 16 | ~1924 |
| Charles Carlson | Head | — | 53 | ~1887 |
| Shirley Carlson | Daughter | — | 4 | ~1936 |
| Robert Carlson | Son | — | 5 | ~1935 |
| Dagma Carlson | Spouse | — | 36 | ~1904 |
Census Appearances
1930
Worcester, Massachusetts
Son, age 11
Worcester, Massachusetts · implied b. ~1919 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carlson |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Worcester-County, Massachusetts
Son, age 21
Worcester-County, Massachusetts · implied b. ~1919 — 12 household members
| Surname | Carlson |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Worcester city |
| 1935 Residence (County) | Worcester |
| Highest Grade | No 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 William Carlson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Carlson
Son · 1940 · age 21 · b. ~1919 · Massachusetts
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Sibling
Florence Carlson
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Shirley Carlson
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Carlson
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Doris Carlson
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elmer Carlson
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Geraldine Carlson
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Carlson
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernice Carlson
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Carlson
Sibling · 1940 · age 2
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 — Worcester-County, Massachusetts
Open full size
1940 US Federal Census — Worcester-County, Massachusetts
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01714-00026)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Charles Mcgovern | 30 | Son | Labor | Massachusetts |
| 42 | Joseph Mcgovern | 28 | Son | Labor | Massachusetts |
| 43 | Mary Mcgovern | 25 | Daughter-in-Law | — | Massachusetts |
| 44 | John Mcgovern | 23 | Son | — | Massachusetts |
| 45 | Francis Mcgovern | 20 | Son | — | Massachusetts |
| 46 | Peter Ewick | 49 | Head | Wire Drawer | Poland |
| 47 | Mary Ewick | 44 | Wife | — | Poland |
| 48 | Nellie Ewick | 22 | Daughter | Waitress | Massachusetts |
| 49 | Joseph Ewick | 20 | Son | Labor | Massachusetts |
| 50 | Stanley Ewick | 17 | Son | Iceman | Massachusetts |
| 51 | Albert Ewick | 13 | Son | — | Massachusetts |
| 52 | Joseph Smallin | 50 | Head | Labor | Lithuania |
| 53 | Josephine Smallin | 45 | Wife | — | Lithuania |
| 54 | Albin Smallin | 20 | Son | — | Massachusetts |
| 55 | Alfonse Smallin | 17 | Son | — | Massachusetts |
| 56 | Isador Pitrauskas | 50 | Head | Labor | Lithuania |
| 57 | Anna Pitrauskas | 45 | Wife | — | Lithuania |
| 58 | Julia Pitrauskas | 21 | Daughter | House Cleaner | Massachusetts |
| 59 | Stella Pitrauskas | 17 | Daughter | Sewer | Massachusetts |
| 60 | Ruth Pitrauskas | 15 | Daughter | — | Massachusetts |
| 61 | Charles Carlson | 53 | Head | Wire Drawer | Finland |
| 62 | Dagma Carlson | 36 | Wife | — | Finland |
| 63 | William Carlson THIS PERSON | 21 | Son | — | Massachusetts |
| 64 | Elmer Carlson | 16 | Son | — | Massachusetts |
| 65 | Florence Carlson | 16 | Daughter | — | Massachusetts |
| 66 | Doris Carlson | 14 | Daughter | — | Massachusetts |
| 67 | Geraldine Carlson | 12 | Daughter | — | Massachusetts |
| 68 | Bernice Carlson | 10 | Daughter | — | Massachusetts |
| 69 | John Carlson | 9 | Son | — | Massachusetts |
| 70 | Robert Carlson | 5 | Son | — | Massachusetts |
| 71 | Shirley Carlson | 4 | Daughter | — | Massachusetts |
| 72 | Charles Jr Carlson | 2 | Son | — | Massachusetts |
| 73 | James Shannon | 54 | Head | Forman | Massachusetts |
| 74 | Mary Shannon | 52 | Wife | — | Ireland |
| 75 | Thomas J Shannon | 32 | Son | Roofer | Massachusetts |
| 76 | Mary A Shannon | 30 | Daughter | Supervisor | Massachusetts |
| 77 | Phillip L Shannon | 28 | Son | Steam-Fitter | Massachusetts |
| 78 | James Shannon | 25 | Son | — | Massachusetts |
| 79 | Walter Shannon | 18 | Son | — | Massachusetts |
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)