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Harold Martin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Butler-County, Iowa
Our Model Tree links this Harold Martin across the 1920, 1930 and 1940 US Censuses in Butler-County, Iowa (XGBoost, ~Confirmed), with identified parents Clarence & Clarence — first a head (b.~1910), then head of a 4-person household.
Age 30
b. ~1910
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Butler-County, Iowa |
| Surname | Martin |
| Given Name | Harold S. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Clarksville town |
| 1935 Residence (County) | Butler |
| Additional Details | |
| Occupation | Clerk |
| Industry | Retail Grocery |
| Class of Worker | PW |
| Hours Worked | 66 |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Clerk |
| Township / Ward | Clarksville Town |
| Est. Birth Year | ~1910 |
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 1940 census.
| Name | Relation to head | Relative to Harold | Age | Birth yr |
|---|---|---|---|---|
| Janice Martin | Daughter | — | 3 | ~1937 |
| Donna Martin | Daughter | — | 7 | ~1933 |
| Harold Martin | Head | — | 30 | ~1910 |
| Irma Martin | Spouse | — | 28 | ~1912 |
Census Appearances
1920
Butler, Iowa
Son, age 10
Butler, Iowa · implied b. ~1910 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Butler, Iowa
Son, age 20
Butler, Iowa · implied b. ~1910 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Harold V. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | Salesman |
| Industry | Grocery Store |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Butler-County, Iowa
Head, age 30
Butler-County, Iowa · implied b. ~1910 — 4 household members
| Surname | Martin |
| Given Name | Harold S. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Clarksville town |
| 1935 Residence (County) | Butler |
| Occupation | Clerk |
| Industry | Retail Grocery |
| Class of Worker | PW |
| Hours Worked | 66 |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| 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 Martin across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Clarence Martin (~0.92 confidence) and father Clarence Martin (~0.92 confidence) and mother Jennie Martin (~0.92 confidence) and mother Jennie Martin (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Clarence Martin
b. ~1875
Source father
● Household
· direct · ~0.92
Father
Clarence Martin
b. ~1876
Source father
● Household
· direct · ~0.92
Mother
Jennie Martin
b. ~1876
Source mother
● Household
· direct · ~0.92
Mother
Jennie Martin
b. ~1877
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harold Martin
Head · 1940 · age 30 · b. ~1910 · Iowa
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Butler-County, Iowa
Open full size
1940 US Federal Census — Butler-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01143-00734)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Floyd L. Ashen | 42 | Head | Superintendent | Minnesota |
| 42 | Marie S. Ashen | 39 | Wife | — | Iowa |
| 43 | Dorothy Gale Ashen | 16 | Daughter | — | Iowa |
| 44 | William W. Ashen | 11 | Son | — | Iowa |
| 45 | Knute Hauge | 65 | Head | — | Norway |
| 46 | Jessie Hauge | 62 | Wife | — | Iowa |
| 47 | Margaret Nedvedeking | 54 | Head | — | Iowa |
| 48 | Marjorie Nedvedeking | 22 | Daughter | Housekeeper | Iowa |
| 49 | Laura Knight | 76 | Head | — | Iowa |
| 50 | Lillie J. Newberry | 73 | Head | — | Minnesota |
| 51 | Ralph O. Scribner | 39 | Head | Salesman | Kansas |
| 52 | Thelma Scribner | 37 | Wife | Manager | Kansas |
| 53 | Romona M. Scribner | 11 | Daughter | — | Kansas |
| 54 | Maxine L. Scribner | 9 | Daughter | — | Kansas |
| 55 | Ronald R. Scribner | 8 | Son | — | Kansas |
| 56 | Jack Austin Scribner | 4 | Son | — | Iowa |
| 57 | Clyde Rook | 55 | Head | Owner Salesman | Iowa |
| 58 | Mae Rook | 52 | Wife | — | Iowa |
| 59 | Ralph Rook | 13 | Son | — | Iowa |
| 60 | Clarence S. Martin | 65 | Head | Owner Clerk | Iowa |
| 61 | Jennie Martin | 63 | Wife | — | Iowa |
| 62 | Harold S. Martin THIS PERSON | 30 | Head | Clerk | Iowa |
| 63 | Irma Martin | 28 | Wife | — | Iowa |
| 64 | Donna Jean Martin | 7 | Daughter | — | Iowa |
| 65 | Janice Martin | 3 | Daughter | — | Iowa |
| 66 | Paul Puryear | 38 | Head | Owner - Barber | Iowa |
| 67 | Gladys Puryear | 35 | Wife | Owner Operator | Iowa |
| 68 | Barbara Barnes | 12 | Daughter | — | Iowa |
| 69 | John G. Weichers | 29 | Head | Owner Salesman | Oklahoma |
| 70 | Lucille M. Weichers | 28 | Wife | Cook | Iowa |
| 71 | Carol J. Weichers | 1 | Daughter | — | Iowa |
| 72 | Meredith A. State | 21 | Lodger | Waitress | Iowa |
| 73 | Geneva A. Wamsley | 18 | Lodger | Waitress | Iowa |
| 74 | Ewald A. Rev. Hardt | 76 | Head | Minister | Germany |
| 75 | C. Edward Phillips | 72 | Head | Clerk | Iowa |
| 76 | Floyd F. Voss | 28 | Head | Printer | Iowa |
| 77 | Marvel J. Voss | 29 | Wife | — | Iowa |
| 78 | Betty Lou Voss | 12 | Daughter | — | Iowa |
| 79 | Merlyn Voss | 10 | Son | — | Iowa |
| 80 | Joyce Voss | 8 | Daughter | — | Iowa |
Pedigree Summary
Harold
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
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)