CJ
Carol Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Carol Johnson across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1921), then head of a 6-person household.
Age 19
b. ~1921
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Johnson |
| Given Name | Carol |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Townsend Center |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Townsend Center |
| 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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Carol | Age | Birth yr |
|---|---|---|---|---|
| Shirley Johnson | Daughter | — | 9 | ~1931 |
| Mabel Johnson | Spouse | — | 46 | ~1894 |
| Sanford Johnson | Head | — | 51 | ~1889 |
| Betty Johnson | Daughter | — | 17 | ~1923 |
| Carol Johnson | Daughter | — | 19 | ~1921 |
| Stewart Johnson | Son | — | 12 | ~1928 |
Census Appearances
1930
Middlesex, Massachusetts
Daughter, age 8
Middlesex, Massachusetts · implied b. ~1922 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Carol V. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Finland |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Daughter, age 19
Middlesex-County, Massachusetts · implied b. ~1921 — 6 household members
| Surname | Johnson |
| Given Name | Carol |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Townsend Center |
| 1935 Residence (County) | Middlesex |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | H 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 Carol Johnson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Carol Johnson
Daughter · 1940 · age 19 · b. ~1921 · Massachusetts
★ You are viewing this record
Sibling
Betty Johnson
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Stewart Johnson
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Shirley Johnson
Sibling · 1940 · age 9
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-t0627-01618-00220)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Hilma Pulkkinen | 54 | Wife | — | Finland |
| 42 | Ellen Roukala | 22 | Daughter | Bookkeeper | Massachusetts |
| 43 | Aina Roukala | 20 | Daughter | Helper | Wyoming |
| 44 | Helen Banyai | 25 | Daughter | — | Massachusetts |
| 45 | John Kemppi | 51 | Head | Laborer | Finland |
| 46 | Sigrid Kemppi | 46 | Wife | — | Finland |
| 47 | Walter Kemppi | 13 | Son | — | Massachusetts |
| 48 | Frank Yobassinen | 60 | Head | Carpenter | Finland |
| 49 | Suoma Yobassinen | 47 | Wife | Homework | Finland |
| 50 | Allan Yobassinen | 13 | Son | — | New York |
| 51 | Sanford Johnson | 51 | Head | Arzing Machine | Finland |
| 52 | Mabel Johnson | 46 | Wife | Farm | Massachusetts |
| 53 | Carol Johnson THIS PERSON | 19 | Daughter | — | Massachusetts |
| 54 | Betty Johnson | 17 | Daughter | — | Massachusetts |
| 55 | Stewart Johnson | 12 | Son | — | Massachusetts |
| 56 | Shirley Johnson | 9 | Daughter | — | Massachusetts |
| 57 | Willard J. Johnson | 43 | Head | Truck Driver | Massachusetts |
| 58 | Philomene Johnson | 41 | Wife | — | Massachusetts |
| 59 | Ruth Johnson | 17 | Daughter | — | New Hampshire |
| 60 | Irene Johnson | 16 | Daughter | — | New Hampshire |
| 61 | Roy Johnson | 14 | Son | — | Massachusetts |
| 62 | Willard Johnson | 12 | Son | — | Massachusetts |
| 63 | Richard Spaulding | 35 | Head | Farmer | Massachusetts |
| 64 | Lillian Spaulding | 37 | Wife | — | Massachusetts |
| 65 | Elizabeth Spaulding | 14 | Daughter | — | Massachusetts |
| 66 | Martha Spaulding | 13 | Daughter | — | Massachusetts |
| 67 | Richard Jr. Spaulding | 11 | Son | — | Massachusetts |
| 68 | Flora Spaulding | 10 | Daughter | — | Massachusetts |
| 69 | Walter Sahlkonge | 31 | Head | Truck Driver | Massachusetts |
| 70 | Margaret Sahlkonge | 24 | Wife | — | Massachusetts |
| 71 | Ruth Sahlkonge | 7 | Daughter | — | Massachusetts |
| 72 | Shirley Sahlkonge | 5 | Daughter | — | Massachusetts |
| 73 | Michael Lavoie | 51 | Head | Road Work | Canada |
| 74 | Katherine Lavoie | 48 | Wife | — | Massachusetts |
| 75 | Ellen Tuttle | 51 | Sister-in-law | — | Massachusetts |
| 76 | Nelson Tuttle | 31 | Nephew | Clerk | Massachusetts |
| 77 | Ralph Strelnough | 28 | Head | Laborer | Massachusetts |
| 78 | Beula Strelnough | 20 | Wife | — | Massachusetts |
| 79 | Peter J. Brockait | 47 | Head | Bus Driver | Pennsylvania |
| 80 | Anna Brockait | 55 | Wife | — | Cuba |
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)