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Harold Martin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Linn-County, Iowa
Our Model Tree links this Harold Martin across the 1920, 1930 and 1940 US Censuses in Linn-County, Iowa (XGBoost, ~Confirmed), with identified parents George & John — first a son (b.~1914), then head of a 4-person household.
Age 26
b. ~1914
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Linn-County, Iowa |
| Surname | Martin |
| Given Name | Harold L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Marion |
| 1935 Residence (County) | Linn |
| Additional Details | |
| Occupation | Shipping Clerk / Accountant |
| Industry | Transportation |
| Class of Worker | PW |
| Hours Worked | 24 |
| Income (1939) | 760 |
| Highest Grade | H-4 |
| 1935 Residence | Same House |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Shipping Clerk / Accountant |
| Township / Ward | Marion |
| 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 |
|---|---|---|---|---|
| Beulah Marsh | Spouse | — | 33 | ~1907 |
| Bernice Harris | Other | — | 19 | ~1921 |
| Melvan Marsh | Head | — | 34 | ~1906 |
| Harold Martin | Son | — | 26 | ~1914 |
Census Appearances
1920
Linn, Iowa
Son, age 5
Linn, Iowa · implied b. ~1915 — 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 | 5 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Linn, Iowa
Son, age 16
Linn, Iowa · implied b. ~1914 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Linn-County, Iowa
Son, age 26
Linn-County, Iowa · implied b. ~1914 — 4 household members
| Surname | Martin |
| Given Name | Harold L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Marion |
| 1935 Residence (County) | Linn |
| Occupation | Shipping Clerk / Accountant |
| Industry | Transportation |
| Class of Worker | PW |
| Hours Worked | 24 |
| Income (1939) | 760 |
| Highest Grade | H-4 |
| 1935 Residence | Same House |
| 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 George Martin (~0.92 confidence) and father John Martin (~0.92 confidence) and mother Ida Martin (~0.92 confidence) and father Melvan Marsh (~0.60 confidence) and mother Beulah Marsh (~0.60 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.79
Father
George Martin
b. ~1883
Source father
● Household
· direct · ~0.92
Father
John Martin
b. ~1885
Source father
● Household
· direct · ~0.92
Mother
Ida Martin
b. ~1889
Source mother
● Household
· direct · ~0.92
Father
Melvan Marsh
b. ~1906
Source father
● Household
· direct · ~0.6
Mother
Beulah Marsh
b. ~1907
Source mother
● Household
· direct · ~0.6
This person
Anchor record
Harold Martin
Son · 1940 · age 26 · b. ~1914 · 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 — Linn-County, Iowa
Open full size
1940 US Federal Census — Linn-County, Iowa
Page Contents
20 people indexed on this census page (nara:1940:m-t0627-01175-00506)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ida Strong | 55 | lodger | — | Iowa |
| 42 | Leo Schamel | 20 | lodger | Waiter | Iowa |
| 43 | Richard Harford | 38 | Head | Cabinetmaker | Iowa |
| 44 | Floyd R. Strane | 55 | lodger | Farm Helper | Iowa |
| 45 | John F. Jellison | 55 | Head | Carpenter | Iowa |
| 46 | Geraldine Jellison | 13 | daughter | — | Iowa |
| 47 | Gayhlene Jellison | 13 | daughter | — | Iowa |
| 48 | John W. Jellison | 9 | son | — | Iowa |
| 49 | Joseph Jellison | 5 | son | — | Iowa |
| 50 | Marshall Melody | 22 | step son | New Worker | Iowa |
| 51 | Robert C. Green | 14 | Son | — | Iowa |
| 52 | Clifford Jensen | 23 | Head | Truck Driver | Iowa |
| 53 | Mildred Jensen | 23 | wife | — | Iowa |
| 54 | Melvan Marsh | 34 | Head | Mechanic | Iowa |
| 55 | Beulah Marsh | 33 | wife | Personal Shopper | Iowa |
| 56 | Bernice M. Harris | 19 | maid | Maid | Iowa |
| 57 | Harold L. Martin THIS PERSON | 26 | Son | Shipping Clerk / Accountant | Iowa |
| 58 | Grant Ralston | 74 | Head | Caretaker | Iowa |
| 59 | Winfield S. Starbuck | 80 | Head | Switchman | Iowa |
| 60 | Marietta H. Starbuck | 82 | Wife | Switchman | Iowa |
Pedigree Summary
Harold
Gen 1 · 5 parents
~0.79
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)