AC
Agnes Clark — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Agnes Clark across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a spouse (b.~1904), then head of a 6-person household.
Age 36
b. ~1904
Female
Spouse
Born: New Hampshire
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Clark |
| Given Name | Agnes |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | New Hampshire |
| 1935 Residence (City) | Hudson |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Highest Grade | H 3 |
| 1935 Residence | Same place |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
| Township / Ward | Hudson |
| Est. Birth Year | ~1904 |
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 Agnes | Age | Birth yr |
|---|---|---|---|---|
| Agnes Clark | Spouse | — | 36 | ~1904 |
| Ernest Clark | Son | — | 10 | ~1930 |
| Ernest Clark | Head | — | 40 | ~1900 |
| Bertha Clark | Daughter | — | 15 | ~1925 |
| Eleanor Clark | Daughter | — | 16 | ~1924 |
| Robert Clark | Son | — | 7 | ~1933 |
Census Appearances
1930
Middlesex, Massachusetts
Spouse, age 25
Middlesex, Massachusetts · implied b. ~1905 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clarke |
| Given Name | Annie |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | New Hampshire |
| Age at First Marriage | 19 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read/Write | Yes |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
1940
Middlesex-County, Massachusetts
Spouse, age 36
Middlesex-County, Massachusetts · implied b. ~1904 — 6 household members
| Surname | Clark |
| Given Name | Agnes |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | New Hampshire |
| 1935 Residence (City) | Hudson |
| 1935 Residence (County) | Middlesex |
| Highest Grade | H 3 |
| 1935 Residence | Same place |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
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 Agnes Clark across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Agnes Clark
Spouse · 1940 · age 36 · b. ~1904 · Massachusetts
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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-t0627-01607-00381)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Samuel Sleeper | 63 | head | Carpenter | Mass |
| 2 | Rose M. Sleeper | 22 | wife | — | Mass |
| 3 | Clara M. Sleeper | 6 | daughter | — | Mass |
| 4 | John L. Sleeper | 4 | son | — | Mass |
| 5 | Lawrence Sleeper | 2 | son | — | Mass |
| 6 | Pauline Libertie | 72 | head | — | New Hampshire |
| 7 | James R. Graves | 30 | son-in-law | Machinist | Mass |
| 8 | Marie Graves | 32 | daughter | — | Mass |
| 9 | Anne Graves | 12 | daughter | — | Mass |
| 10 | Eleanor Walker | 16 | state-child | — | Mass |
| 11 | Marion Burns | 15 | state-child | — | Mass |
| 12 | Hazel Riouy | 9 | state-child | — | Mass |
| 13 | Ernest B. Clark | 40 | head | Machinist | New Hampshire |
| 14 | Agnes Clark THIS PERSON | 36 | wife | — | New Hampshire |
| 15 | Bertha Clark | 15 | daughter | Machine Operator | Conn |
| 16 | Eleanor Clark | 16 | daughter | — | New Hampshire |
| 17 | Ernest J. Clark | 10 | son | — | Mass |
| 18 | Robert Clark | 7 | son | — | Mass |
| 19 | Lionel Garcia | 47 | head | Cutter | Portugal |
| 20 | Wilhelmina Garcia | 44 | wife | — | Portugal |
| 21 | Manuel Garcia | 24 | son | Finisher | Mass |
| 22 | Ida Garcia | 16 | daughter | Cement Soles | Mass |
| 23 | Evangeline Garcia | 15 | daughter | — | Mass |
| 24 | Mary Garcia | 13 | daughter | — | Mass |
| 25 | Joseph Garcia | 8 | son | — | Mass |
| 26 | Michael J. Mcniff | 67 | head | Undertaker | Mass |
| 27 | Catherine Mcniff | 61 | wife | — | Mass |
| 28 | Alice Mcniff | 31 | daughter | Teacher | Mass |
| 29 | Margaret Mcniff | 21 | daughter | New Worker | Mass |
| 30 | Lula Mclaughlin | 57 | head | — | Mass |
| 31 | Ethel Mclaughlin | 40 | daughter | Stitcher | Mass |
| 32 | Hazel Mclaughlin | 38 | daughter | Housework | Mass |
| 33 | Paul Bouquet | 23 | head | Tree Climber | Vermont |
| 34 | Rowena Bouquet | 19 | wife | — | Mass |
| 35 | Rowena J. Bouquet | 0 | daughter | — | Mass |
| 36 | Isador Karlsberg | 36 | head | Medical Doctor | Mass |
| 37 | Celia R. Karlsberg | 31 | wife | — | Mass |
| 38 | Paul Karlsberg | 7 | son | — | Mass |
| 39 | Howard H. Karlsberg | 1 | son | — | Mass |
| 40 | Louis Burgoyne | 35 | head | Shipping Clerk | New Brunswick |
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)