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John Buchanan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Tama-County, Iowa
Our Model Tree links this John Buchanan across the 1920, 1930 and 1940 US Censuses in Tama-County, Iowa (XGBoost, ~Confirmed), with identified parents Clarence & Clayton — first a son (b.~1917), then head of a 5-person household.
Age 23
b. ~1917
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Tama-County, Iowa |
| Surname | Buchanan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Montour Town |
| 1935 Residence (County) | Tama |
| Additional Details | |
| Occupation | Laborer |
| Industry | On farm |
| Class of Worker | W |
| Hours Worked | 16 |
| Income (1939) | 400 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Laborer |
| Township / Ward | Montour Town |
| Est. Birth Year | ~1917 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Louise Buchanan | Head | — | 48 | ~1892 |
| Betty Buchanan | Daughter | — | 13 | ~1927 |
| John Buchanan | Son | — | 23 | ~1917 |
| Merle Buchanan | Son | — | 20 | ~1920 |
| Ruth Buchanan | Daughter | — | 18 | ~1922 |
Census Appearances
1920
Tama, Iowa
Son, age 3
Tama, Iowa · implied b. ~1917 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Buchanan |
| Given Name | John L |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Tama, Iowa
Son, age 13
Tama, Iowa · implied b. ~1917 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Buchanan |
| Given Name | John B. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Tama-County, Iowa
Son, age 23
Tama-County, Iowa · implied b. ~1917 — 5 household members
| Surname | Buchanan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Montour Town |
| 1935 Residence (County) | Tama |
| Occupation | Laborer |
| Industry | On farm |
| Class of Worker | W |
| Hours Worked | 16 |
| Income (1939) | 400 |
| Highest Grade | Hs 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 John Buchanan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Clarence Buchanan (~0.92 confidence) and father Clayton Buchanan (~0.92 confidence) and mother Louise Buchanan (~0.92 confidence) and mother Lulu Buchanan (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Clarence Buchanan
b. ~1884
Source father
● Household
· direct · ~0.92
Father
Clayton Buchanan
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Louise Buchanan
b. ~1892
Source mother
● Household
· direct · ~0.92
Mother
Lulu Buchanan
b. ~1885
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Buchanan
Son · 1940 · age 23 · b. ~1917 · Iowa
★ You are viewing this record
Sibling
Betty Buchanan
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Merle Buchanan
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Buchanan
Sibling · 1940 · age 18
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 — Tama-County, Iowa
Open full size
1940 US Federal Census — Tama-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01207-00213)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Louise Buchanan | 48 | Head | Housework | Iowa |
| 2 | John Buchanan THIS PERSON | 23 | Son | Laborer | Iowa |
| 3 | Merle Buchanan | 20 | Son | Laborer | Iowa |
| 4 | Ruth Buchanan | 18 | Daughter | Office Helper | Iowa |
| 5 | Betty Lou Buchanan | 13 | Daughter | — | Iowa |
| 6 | Laura T. Montgomery | 72 | Head | — | Iowa |
| 7 | Margaret Montgomery | 83 | Head | — | Ireland |
| 8 | Matilda Montgomery | 69 | Sister | — | Ireland |
| 9 | Chas. M. Dorr | 41 | Head | Farmer | Vermont |
| 10 | Alice M. Linnville | 52 | Sister | Housekeeper | Vermont |
| 11 | Charles F. Linnville | 20 | Nephew | Laborer | Kentucky |
| 12 | Philip C. Smith | 67 | Lodger | — | Iowa |
| 13 | John A. Twist | 72 | Head | Farmer | Iowa |
| 14 | Nellie T. Twist | 44 | Wife | Housework | Iowa |
| 15 | Virginia Lee Twist | 14 | Daughter | School | Iowa |
| 16 | Roberta June Twist | 12 | Daughter | School | Iowa |
| 17 | Douglas Arthur Twist | 6 | Son | School | Iowa |
| 18 | Carol Rae Twist | 5 | Daughter | — | Iowa |
| 19 | Kathleen Kay Twist | 2 | Daughter | — | Iowa |
| 20 | Mary Svacina | 47 | Head | Housework | Iowa |
| 21 | Albert Svacina | 25 | Son | Laborer | Iowa |
| 22 | Frank Svacina | 22 | Son | Laborer | Iowa |
| 23 | Elizabeth A. Svacina | 24 | Daughter | Nurse | Iowa |
| 24 | Guy Allen Bailey | 49 | Head | Laborer | Iowa |
| 25 | Edith Bailey | 51 | Wife | Housework | Iowa |
| 26 | William Guy Moore | 4 | Grand Son | — | Iowa |
| 27 | Henry Stump | 88 | Head | Retired | Iowa |
| 28 | Minnie Stump | 71 | Wife | Unable | Vermont |
| 29 | Viola Hard | 70 | Head | Housework | Iowa |
| 30 | John M. Casper | 47 | Head | Truck Driver | Iowa |
| 31 | Evelyn Casper | 37 | Wife | Housework | Indiana |
| 32 | Winifred Casper | 9 | Daughter | School | Iowa |
| 33 | Chloe Ann Casper | 6 | Daughter | School | Iowa |
| 34 | John Walter Casper | 1 | Son | — | Iowa |
| 35 | Walt Weaver Thompson | 43 | Head | Teacher | Iowa |
| 36 | Mary Thompson | 45 | Wife | Housework | Iowa |
| 37 | Marilyn Thompson | 13 | Daughter | School | Iowa |
| 38 | Duane Thompson | 11 | Son | School | Iowa |
| 39 | Grace E. Smith | 70 | Head | Art Dealer | Illinois |
| 40 | Ray Fisher | 45 | Lodger | Laborer | Iowa |
Pedigree Summary
John + 3 siblings
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)