HC
Harold Clark — 1930 US Census Record
Model Tree available1930 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this Harold Clark across the 1910, 1920 and 1930 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed), with identified parents Ellen & George — first a head (b.~1893), then head of a 4-person household.
Age 37
b. ~1893
Male
Head
Born: Massachusetts
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Middlesex, Massachusetts |
| Surname | Clark |
| Given Name | Harold G. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 18 |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | New York |
| Additional Details | |
| Occupation | Elec. Eng. Asst. |
| Industry | Railroading |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 25 |
| Veteran | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Elec. Eng. Asst. |
| Township / Ward | Melrose City |
| Est. Birth Year | ~1893 |
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.
4 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Harold | Age | Birth yr |
|---|---|---|---|---|
| Harold Clark | Head | — | 37 | ~1893 |
| Sigrid Clark | Spouse | — | 28 | ~1902 |
| Sara Simpson | Other | — | 60 | ~1870 |
| Shirley Clark | Daughter | — | 6 | ~1924 |
Census Appearances
1910
Middlesex, Massachusetts
Son, age 16
Middlesex, Massachusetts · implied b. ~1894 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Harold P. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | New Hampshire |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1920
Middlesex, Massachusetts
Head, age 26
Middlesex, Massachusetts · implied b. ~1894 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Harold |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | New Hampshire |
| Occupation | Ammunition worker |
| Industry | Trucking Store |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Head, age 37
Middlesex, Massachusetts · implied b. ~1893 — 4 household members
| Surname | Clark |
| Given Name | Harold G. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 18 |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | New York |
| Occupation | Elec. Eng. Asst. |
| Industry | Railroading |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 25 |
| Veteran | No |
| 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 Harold Clark across 3 US Census years (1910, 1920 and 1930) in Middlesex, Massachusetts, using XGBoost record linkage. Identified parents: mother Ellen Clark (~0.92 confidence) and father George Clark (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Ellen Clark
b. ~1869
Source mother
● Household
· direct · ~0.92
Father
George Clark
b. ~1869
Source father
● Household
· direct · ~0.92
This person
Anchor record
Harold Clark
Head · 1930 · age 37 · b. ~1893 · Massachusetts
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Middlesex, Massachusetts
Open full size
1930 US Federal Census — Middlesex, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel925:0590)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Geo. H. Dodge | 38 | Head | Photo Engraver | Massachusetts |
| 2 | Anna R. H. Dodge | 39 | Wife | — | Massachusetts |
| 3 | Harold G. Clark THIS PERSON | 37 | Head | Elec. Eng. Asst. | Massachusetts |
| 4 | Sigrid E. Clark | 28 | Wife | — | Sweden |
| 5 | Shirley H. Clark | 6 | Daughter | — | Massachusetts |
| 6 | Sara W. Simpson | 60 | Mother | — | New York |
| 7 | Harry C. Smith | 65 | Head | Salesman | New Hampshire |
| 8 | Edith A. Smith | 56 | Wife | — | Massachusetts |
| 9 | Esther H. Smith | 25 | Niece | Stenographer | Massachusetts |
| 10 | Marcellus R. Houdlette | 57 | Head | Iron Merchant | Boston |
| 11 | Flora B. Houdlette | 56 | Wife | — | Massachusetts |
| 12 | Kathryn Houdlette | 24 | Daughter | — | Massachusetts |
| 13 | Miriam Houdlette | 22 | Daughter | — | Massachusetts |
| 14 | Jesse Y. Baker | 75 | Head | Fireman | Massachusetts |
| 15 | Lizzie L. Baker | 73 | Wife | — | Massachusetts |
| 16 | Joseph Pittaway | 73 | Head | Salesman | England |
| 17 | Lucy A. Pittaway | 73 | Wife | — | England |
| 18 | Adelaide M. Pittaway | 49 | Daughter | Manager | England |
| 19 | John A. Pittaway | 38 | Son | Bookkeeper | England |
| 20 | S. Annie Pittaway | 36 | Daughter | Stenographer | Massachusetts |
| 21 | Eva Pittaway | 35 | Daughter | — | Massachusetts |
| 22 | Mary E. Messenger | 55 | Head | — | Massachusetts |
| 23 | Kate F. Nason | 74 | Head | — | New York |
| 24 | Florence L. Nason | 33 | Daughter | Commercial Art | Massachusetts |
| 25 | John S. Vaughan | 34 | Head | Salesman | Massachusetts |
| 26 | Helen L. Vaughan | 32 | Wife | — | New Hampshire |
| 27 | John S. Vaughan | 6 | Son | — | Massachusetts |
| 28 | Mildred L. Bolton | 52 | Head | — | Massachusetts |
| 29 | Chas. Q. Bolton | 28 | Son | Salesman | Massachusetts |
| 30 | Arthur H. Landry | 65 | Head | Painter | Massachusetts |
| 31 | Frances E. Landry | 72 | Wife | — | Maine |
| 32 | Maude C. Collins | 46 | Step-daughter | Inspector | Massachusetts |
| 33 | Eleanor D. Collins | 16 | Step-granddaughter | — | Massachusetts |
| 34 | Mary L. Blunt | 83 | Boarder | — | Massachusetts |
| 35 | Chas. B. Graham | 46 | Head | Electrician | Connecticut |
| 36 | Alice B. Graham | 42 | Wife | — | Massachusetts |
| 37 | Carol A. Graham | 2 | Daughter | — | Massachusetts |
| 38 | Louis M. Cheney | 36 | Head | Clerk | Massachusetts |
| 39 | Elizabeth W. Cheney | 34 | Wife | — | Massachusetts |
| 40 | Priscilla M. Cheney | 6 | Daughter | — | Massachusetts |
| 41 | Elizabeth P. Cheney | 4 | Daughter | — | Massachusetts |
| 42 | Gwendolyn Cheney | 1 | Daughter | — | Massachusetts |
| 43 | Louis Q. Osborne | 60 | Head | Salesman | Massachusetts |
| 44 | M. Maude Osborne | 59 | Wife | Clerk | Massachusetts |
| 45 | Lois M. Cheever | 1 | Grand-daughter | — | Massachusetts |
| 46 | Conrad L. Allan | 38 | Head | Clerk | Massachusetts |
| 47 | Irma C. Allan | 36 | Wife | — | New Hampshire |
| 48 | Robert H. Allan | 11 | Son | — | Massachusetts |
| 49 | Arthur F. Allan | 8 | Son | — | Massachusetts |
| 50 | Peter R. Olsen | 47 | Head | Machinist | Norway |
Pedigree Summary
Harold
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)