HC
Harold Clark — 1930 US Census Record
Model Tree available1930 United States Federal Census · Marshall, Iowa
Our Model Tree links this Harold Clark across the 1910, 1920 and 1930 US Censuses in Marshall, Iowa (XGBoost, ~Confirmed), with identified parents Harold & Hyrkel — first a son (b.~1909), then head of a 6-person household.
Age 21
b. ~1909
Male
Son
Born: Iowa
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Marshall, Iowa |
| Surname | Clark |
| Given Name | Harold H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | South Dakota |
| Mother's Birthplace | Iowa |
| Additional Details | |
| Occupation | Truck driver |
| Industry | Telephone Co. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Truck Driver |
| Township / Ward | Liscomb Town |
| Est. Birth Year | ~1909 |
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 1930 census.
| Name | Relation to head | Relative to Harold | Age | Birth yr |
|---|---|---|---|---|
| Ruth Clark | Daughter | — | 10 | ~1920 |
| Vivian Clark | Daughter | — | 17 | ~1913 |
| Bess Clark | Other | — | 41 | ~1889 |
| Harold Clark | Head | — | 43 | ~1887 |
| Harold Clark | Son | — | 21 | ~1909 |
| Margie Clark | Daughter | — | 9 | ~1921 |
Census Appearances
1910
Marshall, Iowa
Son, age 1
Marshall, Iowa · implied b. ~1909 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | South Dakota |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1920
Marshall, Iowa
Son, age 11
Marshall, Iowa · implied b. ~1909 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | South Dakota |
| Mother's Birthplace | Iowa |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Marshall, Iowa
Son, age 21
Marshall, Iowa · implied b. ~1909 — 6 household members
| Surname | Clark |
| Given Name | Harold H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | South Dakota |
| Mother's Birthplace | Iowa |
| Occupation | Truck driver |
| Industry | Telephone Co. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 Marshall, Iowa, using XGBoost record linkage. Identified parents: father Harold Clark (~0.92 confidence) and father Hyrkel Clark (~0.92 confidence) and mother Grace Clark (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Harold Clark
b. ~1887
Source father
● Household
· direct · ~0.92
Father
Hyrkel Clark
b. ~1887
Source father
● Household
· direct · ~0.92
Mother
Grace Clark
b. ~1889
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harold Clark
Son · 1930 · age 21 · b. ~1909 · Iowa
★ You are viewing this record
Sibling
Ruth Clark
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margie Clark
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Vivian Clark
Sibling · 1930 · age 17
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
1930 US Federal Census — Marshall, Iowa
Open full size
1930 US Federal Census — Marshall, Iowa
Page Contents
50 people indexed on this census page (ia:1930:iowacensus00reel668:0743)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Lucia C. Heil | 70 | Wife-H | None | Iowa |
| 52 | Fred J. Murdock | 67 | Head | Painter | New York |
| 53 | Rilla Thurber | 50 | Head-H | None | Iowa |
| 54 | Mabel R. Thurber | 23 | Daughter | Teacher | Iowa |
| 55 | Helen M. Thurber | 16 | Daughter | None | Iowa |
| 56 | Freddie Thurber | 13 | Son | None | Iowa |
| 57 | C. Ivan Brandow | 33 | Head | Laborer | Iowa |
| 58 | Elizabeth J. Brandow | 23 | Wife-H | None | Iowa |
| 59 | Charles E. Brandow | 6 | Son | None | Iowa |
| 60 | Clarence V. Brandow | 4 | Son | None | Iowa |
| 61 | Clair R. Brandow | 2 | Son | None | Indiana |
| 62 | Claude H. Humphreys | 50 | Head | Laborer | Iowa |
| 63 | Lucille V. Humphreys | 13 | Daughter | None | Iowa |
| 64 | Eugene Mcclannoch | 54 | Head | Laborer | North Carolina |
| 65 | Cora C. Mcclannoch | 53 | Wife-H | None | North Carolina |
| 66 | Lloyd Mcclannoch | 21 | Son | Laborer | Iowa |
| 67 | Rilla M. Miller | 66 | Head-H | Janitor | Iowa |
| 68 | Harold W. Clark | 43 | Head | Carpenter | South Dakota |
| 69 | Bess H. Clark | 41 | Wife-H | None | Iowa |
| 70 | Harold H. Clark THIS PERSON | 21 | Son | Truck Driver | Iowa |
| 71 | Vivian I. Clark | 17 | Daughter | None | Iowa |
| 72 | Ruth E. Clark | 10 | Daughter | None | Iowa |
| 73 | Margie L. Clark | 9 | Daughter | None | Iowa |
| 74 | William M. Brickey | 71 | Head | None | Illinois |
| 75 | Rosa N. Haman | 73 | Head-H | None | Iowa |
| 76 | Emma A. Clark | 71 | Head-H | None | Wisconsin |
| 77 | Earl Z. Clark | 46 | Head | Proprietor | Iowa |
| 78 | Anna G. Clark | 46 | Wife-H | None | Iowa |
| 79 | Alta E. Clark | 21 | Daughter | Stenographer | Iowa |
| 80 | Bessie M. Clark | 18 | Daughter | None | Iowa |
| 81 | Lester S. Prindle | 45 | Head | Foreman | New York |
| 82 | May E. Prindle | 45 | Wife-H | None | Iowa |
| 83 | Irene M. Prindle | 26 | Daughter | None | Iowa |
| 84 | Geraldine F. Prindle | 19 | Daughter | None | Iowa |
| 85 | Harold R. Prindle | 12 | Son | None | Iowa |
| 86 | Donald J. Prindle | 7 | Son | None | Iowa |
| 87 | James B. Small | 34 | Head | Proprietor | Iowa |
| 88 | Irene Small | 36 | Wife-H | None | Iowa |
| 89 | Herbert S. Small | 12 | Son | None | Iowa |
| 90 | Glenn B. Small | 8 | Son | None | Iowa |
| 91 | Ronald W. Small | 6 | Son | None | Iowa |
| 92 | Dorothy M. Small | 4 | Daughter | None | Iowa |
| 93 | Frank E. Ames | 40 | Head | Laborer | Iowa |
| 94 | Ella F. Shaw | 72 | Head-H | None | Wisconsin |
| 95 | Teddy C. Shaw | 21 | Nephew | Laborer | Kansas |
| 96 | Nulda C. Ralston | 70 | Head-H | None | Indiana |
| 97 | Thomas G. Brickey | 73 | Head-H | None | Indiana |
| 98 | Pearl T. Maudlin | 57 | Head | Physician | Iowa |
| 99 | Zelma G. Maudlin | 53 | Wife-H | None | Iowa |
| 100 | Marion Maudlin | 15 | Daughter | None | Iowa |
Related Census Records
Pedigree Summary
Harold + 3 siblings
Gen 1 · 3 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)