DS
Dennis Sullivan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Shelby-County, Iowa
Our Model Tree links this Dennis Sullivan across the 1920, 1930 and 1940 US Censuses in Shelby-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1874), then head of a 4-person household.
Age 66
b. ~1874
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Shelby-County, Iowa |
| Surname | Sullivan |
| Given Name | Dennis L. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 66 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Washington Township |
| 1935 Residence (County) | Shelby |
| Additional Details | |
| Occupation | farmer |
| Industry | farming |
| Class of Worker | OA |
| Hours Worked | 44 |
| Income (1939) | 0 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farmer |
| Township / Ward | Washington Township |
| Est. Birth Year | ~1874 |
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 Dennis | Age | Birth yr |
|---|---|---|---|---|
| Patricia Sullivan | Daughter | — | 22 | ~1918 |
| Ida Sullivan | Spouse | — | 56 | ~1884 |
| Joseph Sullivan | Son | — | 19 | ~1921 |
| Dennis Sullivan | Head | — | 66 | ~1874 |
Census Appearances
1920
Shelby, Iowa
Head, age 46
Shelby, Iowa · implied b. ~1874 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Dennis |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Iowa |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Farmer |
| Industry | Own Farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Shelby, Iowa
Head, age 56
Shelby, Iowa · implied b. ~1874 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Dennis L. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 36 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Occupation | Farmer |
| Industry | General Farming |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Veteran | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Shelby-County, Iowa
Head, age 66
Shelby-County, Iowa · implied b. ~1874 — 4 household members
| Surname | Sullivan |
| Given Name | Dennis L. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 66 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Washington Township |
| 1935 Residence (County) | Shelby |
| Occupation | farmer |
| Industry | farming |
| Class of Worker | OA |
| Hours Worked | 44 |
| Income (1939) | 0 |
| Highest Grade | Hs 2 |
| 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 Dennis Sullivan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Dennis Sullivan
Head · 1940 · age 66 · b. ~1874 · 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 — Shelby-County, Iowa
Open full size
1940 US Federal Census — Shelby-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01204-00483)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Melchior J. Schuery | 59 | Head | Farmer | Iowa |
| 2 | Theresa Schuery | 54 | Wife | — | Iowa |
| 3 | Theresa B. Schuery | 17 | Daughter | Farmer | Iowa |
| 4 | Melvin H. Schuery | 15 | Son | Farmer | Iowa |
| 5 | Mildred J. Schuery | 15 | Daughter | — | Iowa |
| 6 | Cleopha L. Schuery | 11 | Daughter | — | Iowa |
| 7 | William S. Stephany | 33 | Head | Farmer | Iowa |
| 8 | Marie J. B. Stephany | 34 | Wife | — | Iowa |
| 9 | Kathleen M. Stephany | 5 | Daughter | — | Iowa |
| 10 | Constance A. Stephany | 4 | Daughter | 0 | Iowa |
| 11 | Gene V. Stephany | 0 | Son | 0 | Iowa |
| 12 | Balthasar Phillen | 65 | Father in law | Farmer | Iowa |
| 13 | Leo A. Sonntag | 29 | Head | Farmer | Iowa |
| 14 | Isabelle Sonntag | 28 | Wife | — | Iowa |
| 15 | Richard M. Sonntag | 5 | Son | — | Iowa |
| 16 | Gerald M. Sonntag | 3 | Son | — | Iowa |
| 17 | Donald J. Sonntag | 0 | Son | 0 | Iowa |
| 18 | Pat B. Newland | 28 | Head | Farmer | Iowa |
| 19 | Barbara Newland | 23 | Wife | — | Iowa |
| 20 | Peter B. Musell | 37 | Head | Farmer | Iowa |
| 21 | Clara M. Musell | 42 | Wife | Farmer | Iowa |
| 22 | Harold J. Musell | 15 | Son | Farmer | Iowa |
| 23 | Arlene A. Musell | 14 | Daughter | — | Iowa |
| 24 | Richard J. Musell | 12 | Son | — | Iowa |
| 25 | Mildred M. Musell | 6 | Daughter | — | Iowa |
| 26 | Elmer F. Musell | 4 | Son | — | Iowa |
| 27 | Velma M. Musell | 1 | Daughter | — | Iowa |
| 28 | Dennis L. Sullivan THIS PERSON | 66 | Head | Farmer | Iowa |
| 29 | Ida Sullivan | 56 | Wife | — | Iowa |
| 30 | Patricia Sullivan | 22 | Daughter | — | Iowa |
| 31 | Joseph Sullivan | 19 | Son | Farmer | Iowa |
| 32 | Peter E. Musell | 45 | Head | Farmer | Iowa |
| 33 | Anna R. Musell | 42 | Wife | — | Iowa |
| 34 | Anna M. Musell | 18 | Daughter | — | Iowa |
| 35 | Nadine J. Musell | 16 | Daughter | — | Iowa |
| 36 | Ralph N. Musell | 13 | Son | — | Iowa |
| 37 | Rose A. Musell | 11 | Daughter | — | Iowa |
| 38 | Kenneth P. Musell | 9 | Son | — | Iowa |
| 39 | Gerald A. Musell | 5 | Son | — | Iowa |
| 40 | Henry J. Jr. Herbert | 35 | Head | Farmer | 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)