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Harold Martin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Sandusky-County, Ohio
Our Model Tree links this Harold Martin across the 1920, 1930 and 1940 US Censuses in Sandusky-County, Ohio (XGBoost, ~Confirmed), with identified parents Barbara & Geo — first a son (b.~1914), then head of a 4-person household.
Age 26
b. ~1914
Male
Son
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Sandusky-County, Ohio |
| Surname | Martin |
| Given Name | Harold |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Ballville Twp |
| 1935 Residence (County) | Sandusky |
| Additional Details | |
| Occupation | Farmer |
| Industry | at home |
| Class of Worker | OA |
| Hours Worked | 52 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Ohio |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Farmer |
| Township / Ward | Ballville Twp |
| Est. Birth Year | ~1914 |
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 |
|---|---|---|---|---|
| Barbara Martin | Spouse | — | 68 | ~1872 |
| Harold Martin | Son | — | 26 | ~1914 |
| Geo Martin | Head | — | 66 | ~1874 |
| Earl Martin | Son | — | 34 | ~1906 |
Census Appearances
1920
Sandusky, Ohio
Son, age 6
Sandusky, Ohio · implied b. ~1914
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | Martin |
| Given Name | Harold B |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Sandusky, Ohio
Son, age 16
Sandusky, Ohio · implied b. ~1914 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Harold L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Occupation | Laborer |
| Industry | Genl Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Sandusky-County, Ohio
Son, age 26
Sandusky-County, Ohio · implied b. ~1914 — 4 household members
| Surname | Martin |
| Given Name | Harold |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Ballville Twp |
| 1935 Residence (County) | Sandusky |
| Occupation | Farmer |
| Industry | at home |
| Class of Worker | OA |
| Hours Worked | 52 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Ohio |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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: mother Barbara Martin (~0.92 confidence) and father Geo Martin (~0.92 confidence) and father George Martin (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Barbara Martin
b. ~1872
Source mother
● Household
· direct · ~0.92
Father
Geo Martin
b. ~1874
Source father
● Household
· direct · ~0.92
Father
George Martin
b. ~1874
Source father
● Household
· direct · ~0.92
This person
Anchor record
Harold Martin
Son · 1940 · age 26 · b. ~1914 · Ohio
★ You are viewing this record
Sibling
Earl Martin
Sibling · 1940 · age 34
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
1940 US Federal Census — Sandusky-County, Ohio
Open full size
1940 US Federal Census — Sandusky-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03139-00019)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | David | 1 | son | — | Ohio |
| 2 | Ronald | 0 | son | — | Ohio |
| 3 | Geo. T. Martin | 66 | Head | Retired Farmer | Ohio |
| 4 | Barbara Martin | 68 | Wife | Housewife | Ohio |
| 5 | Earl Martin | 34 | son | Farmer | Ohio |
| 6 | Harold Martin THIS PERSON | 26 | son | Farmer | Ohio |
| 7 | Herbert Swartzlander | 43 | Head | Labor | Ohio |
| 8 | Lena Swartzlander | 52 | Wife | Housewife | Ohio |
| 9 | Dorothy Swartzlander | 20 | daughter | Housework | Ohio |
| 10 | Lela Swartzlander | 16 | daughter | — | Ohio |
| 11 | Dean Clemens | 46 | Head | Forge Str. | Mich. |
| 12 | Stella Clemens | 43 | Wife | Housewife | Ohio |
| 13 | Paul Snyder | 45 | Head | Farmer | Ohio |
| 14 | Rose Snyder | 44 | Wife | Housewife | Ohio |
| 15 | Ruth Snyder | 19 | daughter | Beautician | Ohio |
| 16 | Richard Snyder | 16 | son | Farmer | Ohio |
| 17 | Donald Snyder | 12 | son | — | Ohio |
| 18 | Glenn Lehman | 28 | son-in-law | Roofer | Ohio |
| 19 | Coletta Lehman | 18 | daughter | Housewife | Ohio |
| 20 | Marilyn Lehman | 0 | granddaughter | — | Ohio |
| 21 | Harry Lehman | 63 | Head | Blind | Pa. |
| 22 | Estella Lehman | 63 | Wife | Bed Fast | Ohio |
| 23 | Hazel Lehman | 22 | daughter | Housework | Ohio |
| 24 | Wm Sachs | 73 | Head | — | Ohio |
| 25 | Clara Sachs | 74 | Wife | — | Ohio |
| 26 | Fern Sachs | 48 | daughter | Housekeeper | Ohio |
| 27 | Carl R. Sachs | 48 | Head | Farmer | Ohio |
| 28 | Hazel Sachs | 50 | Wife | Housekeeper | Ohio |
| 29 | William Sachs | 17 | son | — | Ohio |
| 30 | Howard Sachs | 15 | son | — | Ohio |
| 31 | Donald Sachs | 13 | son | — | Ohio |
| 32 | Marian Sachs | 11 | daughter | — | Ohio |
| 33 | Carl Sachs | 10 | son | — | Ohio |
| 34 | Christian Schutt | 66 | Head | Farming | Germany |
| 35 | Elizabeth Schutt | 63 | Wife | Housewife | Ohio |
| 36 | Ethel Schutt | 14 | daughter | — | Ohio |
| 37 | Anthony Meyers | 45 | Head | Farmer | Ohio |
| 38 | Louise Meyers | 42 | Wife | Housewife | Ohio |
| 39 | Kenneth Meyers | 19 | son | Farm Help. | Ohio |
| 40 | Richard Meyers | 17 | son | Farm Help. | Ohio |
Pedigree Summary
Harold + 1 sibling
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 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)