HC
Harry Clark — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Grafton-County, New Hampshire
Our Model Tree links this Harry Clark across the 1910, 1920, 1930 and 1940 US Censuses in Grafton-County, New Hampshire (XGBoost, ~Confirmed) — first a head (b.~1876), then head of a 6-person household.
Age 64
b. ~1876
Male
Head
Born: New Hampshire
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Grafton-County, New Hampshire |
| Surname | Clark |
| Given Name | Harry A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 64 |
| Marital Status | Married |
| Birthplace | New Hampshire |
| 1935 Residence (County) | Grafton |
| Additional Details | |
| Occupation | Farm |
| Industry | OA |
| Class of Worker | 0 |
| Highest Grade | No 8 |
| 1935 Residence | 72 |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
| Occupation | Farm |
| Township / Ward | North Haverhill |
| Est. Birth Year | ~1876 |
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 Harry | Age | Birth yr |
|---|---|---|---|---|
| Elizabeth Clark | Daughter | — | 23 | ~1917 |
| Harry Clark | Head | — | 64 | ~1876 |
| Virginia Bradley | Other | — | 24 | ~1916 |
| Dale Clark | Other | — | 11 | ~1929 |
| Walter Clark | Son | — | 35 | ~1905 |
| Grace Clark | Spouse | — | 58 | ~1882 |
Census Appearances
1910
Grafton, New …
Head, age 33
Grafton, New Hampshire · implied b. ~1877 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Harry Clark |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | New Hampshire |
| Years Married | 10 |
| Father's Birthplace | New Hampshire |
| Mother's Birthplace | New Hampshire |
| Occupation | Farmer |
| Industry | General farm |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
1920
Grafton, New …
Head, age 42
Grafton, New Hampshire · implied b. ~1878 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Harvey E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | New Hampshire |
| Father's Birthplace | New Hampshire |
| Mother's Birthplace | New Hampshire |
| Occupation | Farmer |
| Industry | General farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
1930
Grafton, New …
Head, age 53
Grafton, New Hampshire · implied b. ~1877 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Harry G. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | New Hampshire |
| Age at First Marriage | 23 |
| Father's Birthplace | New Hampshire |
| Mother's Birthplace | New Hampshire |
| Occupation | Farmer |
| Industry | General |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
1940
Grafton-County, New …
Head, age 64
Grafton-County, New Hampshire · implied b. ~1876 — 6 household members
| Surname | Clark |
| Given Name | Harry A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 64 |
| Marital Status | Married |
| Birthplace | New Hampshire |
| 1935 Residence (County) | Grafton |
| Occupation | Farm |
| Industry | OA |
| Class of Worker | 0 |
| Highest Grade | No 8 |
| 1935 Residence | 72 |
| 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 Harry Clark across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Harry Clark
Head · 1940 · age 64 · b. ~1876 · New Hampshire
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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 — Grafton-County, New Hampshire
Open full size
1940 US Federal Census — Grafton-County, New Hampshire
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02286-00474)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Merlene M. Demers | 5 | Daughter | — | New Hampshire |
| 2 | Alan L. Demers | 3 | Son | — | New Hampshire |
| 3 | Maxine L. Demers | 2 | Daughter | — | New Hampshire |
| 4 | Colon F. Cassidy | 51 | Head | Farmer | Vermont |
| 5 | Winifred Cassidy | 43 | Wife | — | New Hampshire |
| 6 | Curtis C. Cassidy | 13 | Son | — | New Hampshire |
| 7 | Lawrence J. Cassidy | 20 | Nephew | — | Vermont |
| 8 | Parker Brown | 51 | Head | Farm | New Hampshire |
| 9 | Belle Brown | 54 | Wife | Grist Mill | New Hampshire |
| 10 | Lennard O. Smith | 23 | Head | Laborer | New Hampshire |
| 11 | Elizabeth M. Smith | 21 | Wife | — | New Hampshire |
| 12 | Joan M. Smith | 4 | Daughter | — | New Hampshire |
| 13 | Frank L. Smith | 1 | Son | — | New Hampshire |
| 14 | Marilyn E. Smith | 0 | Daughter | — | New Hampshire |
| 15 | Harry A. Clark THIS PERSON | 64 | Head | Farm | New Hampshire |
| 16 | Grace E. Clark | 58 | Wife | — | New Hampshire |
| 17 | Walter E. Clark | 35 | Son | Fire Hazard | New Hampshire |
| 18 | Elizabeth G. Clark | 23 | Daughter | Private Family | New Hampshire |
| 19 | Dale V. Clark | 11 | Grandson | — | New Hampshire |
| 20 | Virginia Bradley | 24 | Teacher | Teaching | New Hampshire |
| 21 | Lyman V. Mardin | 69 | Head | Farm | New Hampshire |
| 22 | Cora E. Mardin | 68 | Wife | — | New Hampshire |
| 23 | Constance J. Mardin | 8 | Granddaughter | — | New Hampshire |
| 24 | Nellie Welch | 79 | Lodger | — | New Hampshire |
| 25 | Marjorie A. Thurston | 13 | Lodger | — | New Hampshire |
| 26 | Bessie Tyler | 51 | Head | — | New Hampshire |
| 27 | Russell Dexter | 35 | Hired Hand | Farm | New Hampshire |
| 28 | Fred T. Clough | 49 | Head | Farm | New Hampshire |
| 29 | Eva W. Clough | 49 | Wife | — | New Hampshire |
| 30 | Harold W. Clough | 20 | Son | — | New Hampshire |
| 31 | Thelma R. Clough | 17 | Daughter | — | New Hampshire |
| 32 | Lawrence F. Clough | 6 | Son | — | New Hampshire |
| 33 | George Raymond | 16 | Hired Hand | Hired Hand | New Hampshire |
| 34 | Flavius M. Wells | 79 | Head | Farm | Massachusetts |
| 35 | Nellie V. Wells | 78 | Wife | — | Iowa |
| 36 | Harry H. Hunt | 38 | Head | Farm | New Hampshire |
| 37 | Josephine Hunt | 76 | Mother | — | New Hampshire |
| 38 | Byron Oliver Hunt | 82 | Uncle | — | New Hampshire |
| 39 | Lillian Harris | 48 | Head | — | Massachusetts |
| 40 | William Harris | 20 | Son | Farm | New Hampshire |
Related Census Records
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)