JP
John Parker — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this John Parker across the 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1877), then head of a 4-person household.
Age 63
b. ~1877
Male
Head
Born: Illinois
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Parker |
| Given Name | John A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 63 |
| Marital Status | Widowed |
| Birthplace | Illinois |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Occupation | Realtor |
| Industry | Land Co. |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 1500 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Realtor |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1877 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| John Parker | Head | — | 63 | ~1877 |
| Helen Parker | Other | — | 27 | ~1913 |
| John Parker | Other | — | ~1940 | |
| John Parker | Son | — | 32 | ~1908 |
Census Appearances
1920
Polk, Iowa
Head, age 42
Polk, Iowa · implied b. ~1878 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Parker |
| Given Name | John A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | England |
| Occupation | Agent |
| Industry | Real Estate |
| Class of Worker | O |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Polk, Iowa
Head, age 53
Polk, Iowa · implied b. ~1877 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Parker |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 26 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | England |
| Occupation | Proprietor |
| Industry | Real Estate Office |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 4500 |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Polk-County, Iowa
Head, age 63
Polk-County, Iowa · implied b. ~1877 — 4 household members
| Surname | Parker |
| Given Name | John A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 63 |
| Marital Status | Widowed |
| Birthplace | Illinois |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Occupation | Realtor |
| Industry | Land Co. |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 1500 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Parker 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 Parker
Head · 1940 · age 63 · b. ~1877 · 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 — Polk-County, Iowa
Open full size
1940 US Federal Census — Polk-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01195-00992)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Vincenzo Lofaro | 63 | Head | Miner | Italy |
| 2 | Mary Lofaro | 52 | Wife | — | Yugoslavia |
| 3 | Albert Lofaro | 20 | Son | Laborer | Iowa |
| 4 | Edward Lofaro | 15 | Son | — | Iowa |
| 5 | Eugene Lofaro | 13 | Son | — | Iowa |
| 6 | Raymond Lofaro | 11 | Son | — | Iowa |
| 7 | Catherine Lofaro | 23 | Daughter | Photographer | Iowa |
| 8 | Elvera Lofaro | 17 | Daughter | Stenographer | Iowa |
| 9 | Joseph Chiesa | 82 | Head | — | Italy |
| 10 | Laura Chiesa | 76 | Wife | — | Italy |
| 11 | Frank Palandri | 58 | Head | — | Italy |
| 12 | Mary Palandri | 54 | Wife | — | Italy |
| 13 | August Malandri | 55 | Cousin | Coal Miner | Italy |
| 14 | John A. Parker THIS PERSON | 63 | Head | Realtor | Illinois |
| 15 | John A. Jr. Parker | 32 | Son | Dentist | Iowa |
| 16 | Helen E. Parker | 27 | Daughter-in-law | Stenographer | Kansas |
| 17 | John A. 3Rd Parker | 0 | Grand-son | — | Iowa |
| 18 | Alphonso Chisari | 33 | Head | Baker | Italy |
| 19 | Theresa Chisari | 28 | Wife | — | Italy |
| 20 | Domando Chisari | 8 | Son | — | Iowa |
| 21 | Frank Chisari | 6 | Son | — | Iowa |
| 22 | John Chisari | 3 | Son | — | Iowa |
| 23 | Gottlieb Beeler | 76 | Head | Cement Fin. | Oklahoma |
| 24 | Ida Beeler | 76 | Wife | — | Iowa |
| 25 | Lewis Krall | 73 | Cousin | Clerk | Iowa |
| 26 | Dominic Paterno | 32 | Head | Bartender | Italy |
| 27 | Minnie Paterno | 25 | Wife | — | Iowa |
| 28 | Anthony Paterno | 6 | Son | — | Iowa |
| 29 | Albert Fusaro | 34 | Head | Service Man | New York |
| 30 | Ena Fusaro | 31 | Wife | Clerk | Iowa |
| 31 | Ermilia Margaret Fusaro | 9 | Daughter | — | Illinois |
| 32 | Amelio Canatri | 27 | Head | Miner | Iowa |
| 33 | Martha Canatri | 25 | Wife | Asst. Editor | Iowa |
| 34 | Rosina Grace | 52 | Mother-in-law | Senior Clerk | Iowa |
| 35 | Carl Grace | 14 | Brother-in-law | — | Iowa |
| 36 | Ruth Grace | 18 | Sister-in-law | — | Iowa |
| 37 | Marta Grace | 16 | Sister-in-law | — | Iowa |
| 38 | Joe H. Cordaro | 76 | Head | — | Iowa |
| 39 | Anna E. Cordaro | 74 | Wife | — | Penn. |
| 40 | John H. Demarco | 33 | Head | Bartender | 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)