JD
John Dolan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Adair-County, Iowa
Our Model Tree links this John Dolan across the 1920, 1930 and 1940 US Censuses in Adair-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1864), then head of a 3-person household.
Age 76
b. ~1864
Male
Head
Born: Iowa
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Adair-County, Iowa |
| Surname | Dolan |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 76 |
| Marital Status | Widowed |
| Birthplace | Iowa |
| 1935 Residence (City) | Walnut Township |
| 1935 Residence (County) | Adair |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farming |
| Class of Worker | OA |
| Hours Worked | 14 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farmer |
| Township / Ward | Walnut Township |
| Est. Birth Year | ~1864 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Alberta Dolan | Daughter | — | 29 | ~1911 |
| Margaret Dolan | Daughter | — | 41 | ~1899 |
| John Dolan | Head | — | 76 | ~1864 |
Census Appearances
1920
Adair, Iowa
Head, age 58
Adair, Iowa · implied b. ~1862 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dolan |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | Iowa |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Farmer |
| Industry | Gen Farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Adair, Iowa
Head, age 67
Adair, Iowa · implied b. ~1863 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dolan |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 67 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 28 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Veteran | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Adair-County, Iowa
Head, age 76
Adair-County, Iowa · implied b. ~1864 — 3 household members
| Surname | Dolan |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 76 |
| Marital Status | Widowed |
| Birthplace | Iowa |
| 1935 Residence (City) | Walnut Township |
| 1935 Residence (County) | Adair |
| Occupation | Farmer |
| Industry | Farming |
| Class of Worker | OA |
| Hours Worked | 14 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 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 Dolan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Dolan
Head · 1940 · age 76 · b. ~1864 · Iowa
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Adair-County, Iowa
Open full size
1940 US Federal Census — Adair-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01136-00410)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | James E Thompson | 2 | Son | — | Iowa |
| 42 | Johnnie Thompson | 62 | Head | Farmer | Iowa |
| 43 | Jennie M Thompson | 58 | Wife | — | England |
| 44 | Clarence E Thompson | 34 | Son | Farmer | Iowa |
| 45 | Charles Thompson | 28 | Son | Farm Laborer | Colorado |
| 46 | Gilbert Jerry Thompson | 1 | Son | Farm Laborer | Iowa |
| 47 | Lloyd Dolan | 44 | Head | Farmer | Iowa |
| 48 | Elizabeth Dolan | 38 | Wife | — | Iowa |
| 49 | Keith L Dolan | 5 | Son | — | Iowa |
| 50 | James L Dolan | 2 | Son | — | Iowa |
| 51 | Eugene B Dolan | 0 | Son | — | Iowa |
| 52 | Scott Partlow | 27 | Head | Farmer | Iowa |
| 53 | Mabel V Partlow | 24 | Wife | — | Iowa |
| 54 | Marlene Partlow | 5 | Daughter | — | Iowa |
| 55 | Shirley Partlow | 4 | Daughter | — | Iowa |
| 56 | John Dolan THIS PERSON | 76 | Head | Farmer | Iowa |
| 57 | Margaret H Dolan | 41 | Daughter | — | Iowa |
| 58 | Alberta J Dolan | 29 | Daughter | — | Iowa |
| 59 | Chris H Christensen | 58 | Head | Farmer | Denmark |
| 60 | Anna G Christensen | 56 | Wife | — | Denmark |
| 61 | Anna D Christensen | 22 | Daughter | Farm Laborer | Iowa |
| 62 | Freddie M Christensen | 19 | Son | Farm Laborer | Iowa |
| 63 | Johanna D Christensen | 17 | Daughter | — | Iowa |
| 64 | Erma C Christensen | 15 | Daughter | — | Iowa |
| 65 | Adolph Christensen | 29 | Head | Farmer | Iowa |
| 66 | Gladys V Christensen | 31 | Wife | — | Iowa |
| 67 | Mardell L Christensen | 4 | Daughter | — | Iowa |
| 68 | Lawrence C Sudelmann | 40 | Head | Farmer | Iowa |
| 69 | Lillian M Sudelmann | 38 | Wife | — | Iowa |
| 70 | Loisrae H Sudelmann | 7 | Daughter | — | Iowa |
| 71 | Carl F Schwalbe | 76 | Head | Farmer | Germany |
| 72 | Pauline C Schwalbe | 73 | Wife | — | Germany |
| 73 | Ida E Schwalbe | 45 | Daughter | Farm Laborer | Iowa |
| 74 | William C Schwalbe | 36 | Son | Farm Laborer | Iowa |
| 75 | Arthur L Schwalbe | 28 | Son | Farm Laborer | Iowa |
| 76 | John L D Suhr | 41 | Head | Farmer | Iowa |
| 77 | Verna C R Suhr | 42 | Wife | — | Iowa |
| 78 | Dale L Suhr | 13 | Son | — | Iowa |
| 79 | Dean E Suhr | 11 | Son | — | Iowa |
| 80 | Frank Thompson | 56 | Hired Hand | Farm Laborer | Iowa |
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)