JJ
John Jackson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Union-County, Iowa
Our Model Tree links this John Jackson across the 1920, 1930 and 1940 US Censuses in Union-County, Iowa (XGBoost, ~Confirmed), with identified parents M & Noah — first a son (b.~1910), then head of a 7-person household.
Age 30
b. ~1910
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Union-County, Iowa |
| Surname | Jackson |
| Given Name | John W |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Pleasant Twp. |
| 1935 Residence (County) | Union County |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 77 |
| Income (1939) | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farmer |
| Township / Ward | Pleasant Twp |
| 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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Doris Jackson | Daughter | — | 15 | ~1925 |
| M Jackson | Head | — | 51 | ~1889 |
| Allan Jackson | Son | — | 26 | ~1914 |
| Morris Jackson | Son | — | 10 | ~1930 |
| John Jackson | Son | — | 30 | ~1910 |
| Lorin Jackson | Son | — | 12 | ~1928 |
| Loly Jackson | Spouse | — | 53 | ~1887 |
Census Appearances
1920
Union, Iowa
Son, age 10
Union, Iowa · implied b. ~1910 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jackson |
| Given Name | John W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Union, Iowa
Son, age 20
Union, Iowa · implied b. ~1910 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jackson |
| Given Name | John W |
| 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 | Laborer |
| Industry | Gen Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Union-County, Iowa
Son, age 30
Union-County, Iowa · implied b. ~1910 — 7 household members
| Surname | Jackson |
| Given Name | John W |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Pleasant Twp. |
| 1935 Residence (County) | Union County |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 77 |
| 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 John Jackson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father M Jackson (~0.92 confidence) and father Noah Jackson (~0.92 confidence) and mother Loly Jackson (~0.92 confidence) and mother Lola Jackson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
M Jackson
b. ~1889
Source father
● Household
· direct · ~0.92
Father
Noah Jackson
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Loly Jackson
b. ~1887
Source mother
● Household
· direct · ~0.92
Mother
Lola Jackson
b. ~1888
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Jackson
Son · 1940 · age 30 · b. ~1910 · Iowa
★ You are viewing this record
Sibling
Doris Jackson
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lorin Jackson
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Allan Jackson
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Morris Jackson
Sibling · 1940 · age 10
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 — Union-County, Iowa
Open full size
1940 US Federal Census — Union-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01208-00400)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ray D Gripp | 35 | Head | Farmer | Iowa |
| 2 | Lila Gripp | 30 | Wife | — | Iowa |
| 3 | John Lee Gripp | 63 | Head | Farmer | Iowa |
| 4 | Jessie Gripp | 62 | Wife | — | Illinois |
| 5 | Oscar Gripp | 65 | Head | Farmer | Iowa |
| 6 | Florence D Gripp | 60 | Wife | — | Iowa |
| 7 | M. P. Jackson | 51 | Head | Farmer | Iowa |
| 8 | Loly O Jackson | 53 | Wife | — | Iowa |
| 9 | John W Jackson THIS PERSON | 30 | Son | Farmer | Iowa |
| 10 | Allan L Jackson | 26 | Son | — | Iowa |
| 11 | Doris R Jackson | 15 | Daughter | — | Iowa |
| 12 | Lorin M Jackson | 12 | Son | — | Iowa |
| 13 | Morris R Jackson | 10 | Son | — | Iowa |
| 14 | C. L. Pettet | 59 | Head | Farmer | Virginia |
| 15 | Sadie Pettet | 53 | Wife | — | Iowa |
| 16 | Everett Pettet | 24 | Son | Farmer | Iowa |
| 17 | Hazel Pettet | 22 | Wife | — | Iowa |
| 18 | Elgie Wake | 40 | Head | Farmer | Iowa |
| 19 | Maggie Wake | 40 | Wife | — | Iowa |
| 20 | Raymond Wake | 17 | Son | Farmer | Iowa |
| 21 | Kathryn Wake | 7 | Daughter | — | Iowa |
| 22 | W. E. Gripp | 56 | Head | Farmer | Iowa |
| 23 | Mary Bell Gripp | 56 | Wife | — | Iowa |
| 24 | Mary Josephine Gripp | 13 | Daughter | — | Iowa |
| 25 | Frank Lewis | 69 | Head | — | Iowa |
| 26 | Laura Lewis | 62 | Wife | — | Iowa |
| 27 | Merle Lewis | 24 | Son | Farmer | Iowa |
| 28 | W. F. Alexander | 33 | Head | Farmer | Iowa |
| 29 | Winona Alexander | 33 | Wife | — | Iowa |
| 30 | Cecil D Beaman | 25 | Head | Farmer | Iowa |
| 31 | Mary Beaman | 46 | Mother | — | Illinois |
| 32 | Elmo Fleming | 24 | Head | Farmer | Iowa |
| 33 | Charlotte Fleming | 22 | Wife | — | Iowa |
| 34 | Elmo Jr. Fleming | 1 | Son | — | Iowa |
| 35 | William Lafferty | 43 | Head | Farmer | Iowa |
| 36 | Kathryn Lafferty | 25 | Wife | — | Missouri |
| 37 | Larry L Lafferty | 2 | Son | — | Iowa |
| 38 | Julia K Lafferty | 0 | Daughter | — | Iowa |
| 39 | Alice Lafferty | 70 | Mother | — | Iowa |
| 40 | Jane Elizabeth Ayres | 29 | Lodger | Teacher | Iowa |
Pedigree Summary
John + 4 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)