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Harold Martin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Jefferson-County, Kansas
Our Model Tree links this Harold Martin across the 1920, 1930 and 1940 US Censuses in Jefferson-County, Kansas (XGBoost, ~Confirmed), with identified parents William & William — first a son (b.~1909), then head of a 3-person household.
Age 31
b. ~1909
Male
Son
Born: Kansas
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Kansas |
| Surname | Martin |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Kansas |
| Additional Details | |
| Occupation | Same place |
| Industry | 60 |
| Class of Worker | Farmer |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
| Occupation | Same Place |
| Township / Ward | Rock Creek Twp |
| 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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Harold | Age | Birth yr |
|---|---|---|---|---|
| Birdie Martin | Spouse | — | 52 | ~1888 |
| William Martin | Head | — | 55 | ~1885 |
| Harold Martin | Son | — | 31 | ~1909 |
Census Appearances
1920
Jefferson, Kansas
Son, age 10
Jefferson, Kansas · implied b. ~1910 — 3 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 | Kansas |
| Father's Birthplace | Kansas |
| Mother's Birthplace | Iowa |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1930
Jefferson, Kansas
Son, age 21
Jefferson, Kansas · implied b. ~1909 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Harold A. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Kansas |
| Father's Birthplace | Kansas |
| Mother's Birthplace | Iowa |
| Occupation | truck driver |
| Industry | U.S. Mail |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | no |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1940
Jefferson-County, Kansas
Son, age 31
Jefferson-County, Kansas · implied b. ~1909 — 3 household members
| Surname | Martin |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Kansas |
| Occupation | Same place |
| Industry | 60 |
| Class of Worker | Farmer |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
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 William Martin (~0.92 confidence) and father William Martin (~0.92 confidence) and father William Martin (~0.92 confidence) and mother Birdie Martin (~0.92 confidence) and mother Birdie Martin (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Martin
b. ~1883
Source father
● Household
· direct · ~0.92
Father
William Martin
b. ~1884
Source father
● Household
· direct · ~0.92
Father
William Martin
b. ~1885
Source father
● Household
· direct · ~0.92
Mother
Birdie Martin
b. ~1888
Source mother
● Household
· direct · ~0.92
Mother
Birdie Martin
b. ~1888
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harold Martin
Son · 1940 · age 31 · b. ~1909 · Kansas
★ 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 — Jefferson-County, Kansas
Open full size
1940 US Federal Census — Jefferson-County, Kansas
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01236-00266)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Alice Louise Patterson | 2 | G D | Same Place | Kansas |
| 2 | Edward S Dayton | 48 | Head | Same Place | Kansas |
| 3 | Bertha Dayton | 45 | Wife | Same Place | Kansas |
| 4 | Robert Dayton | 5 | Son | Same Place | Kansas |
| 5 | Vern Weaver | 39 | Head | Same Place | Kansas |
| 6 | Leona Weaver | 25 | Wife | Same Place | Kansas |
| 7 | William Martin | 55 | Head | Same Place | Kansas |
| 8 | Birdie Martin | 52 | Wife | Same Place | Iowa |
| 9 | Harold Martin THIS PERSON | 31 | Son | Same Place | Kansas |
| 10 | Sherman Patterson | 55 | Head | Same Place | Kansas |
| 11 | Blanche Patterson | 51 | Wife | Same Place | Kansas |
| 12 | Louis Patterson | 4 | Board. son | Same Place | Kansas |
| 13 | August Rittel | 54 | Head | Same Place | Kansas |
| 14 | Edith Rittel | 52 | Wife | Same Place | Kansas |
| 15 | Earl Rittel | 25 | Son | Same Place | Kansas |
| 16 | Eva Belle Rittel | 14 | Daughter | Same Place | Kansas |
| 17 | Joe Means | 37 | Head | Same Place | Missouri |
| 18 | May Means | 38 | Wife | Same Place | Kansas |
| 19 | David E Renfro | 60 | Head | Same Place | Kansas |
| 20 | Print Hurst | 53 | Head | Same Place | Kansas |
| 21 | Gladys Hurst | 47 | Wife | Same Place | Kentucky |
| 22 | Robert Trimble | 52 | Head | Same Place | Kansas |
| 23 | Ruth E Trimble | 54 | Wife | Same Place | Illinois |
| 24 | James Post | 53 | Head | Same Place | Kansas |
| 25 | Hattie Post | 51 | Wife | Same Place | Kansas |
| 26 | Mary Post | 15 | Daughter | Same Place | Kansas |
| 27 | William Post | 13 | Son | Same Place | Kansas |
| 28 | George Armstead | 66 | Head | Same Place | Kansas |
| 29 | Thomas Lassiter | 40 | Son-in-law | Same Place | Kansas |
| 30 | Mildred Lassiter | 36 | Daughter | Same Place | Kansas |
| 31 | Thomas Jr. Lassiter | 13 | Son | Same Place | Kansas |
| 32 | Raymond Geer | 36 | Laborer | Same Place | Kansas |
| 33 | Claude Armstead | 42 | Head | Same Place | Kansas |
| 34 | Iola Armstead | 28 | Wife | Same Place | Kansas |
| 35 | Claude Eugene Armstead | 7 | Son | Same Place | Kansas |
| 36 | Donna Armstead | 4 | Daughter | Same Place | Kansas |
| 37 | Theodore Schank | 35 | Head | Same Place | Iowa |
| 38 | Mary Schank | 30 | Wife | Same Place | Nebraska |
| 39 | Lee Curtis Bowen | 68 | Head | Same Place | Missouri |
| 40 | Harl Edmondson | 57 | Hired boy | Same Place | Iowa |
Pedigree Summary
Harold
Gen 1 · 5 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)