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John Shaw — 1940 US Census Record
Model Tree available1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this John Shaw across the 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed), with identified parents Thomas & Catherine — first a son (b.~1920), then head of a 2-person household.
Age 20
b. ~1920
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Shaw |
| Given Name | John A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Occupation | Messenger |
| Industry | Bank |
| Class of Worker | PW |
| Hours Worked | 41 |
| Income (1939) | 300 |
| Highest Grade | C 1 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Messenger |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1920 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Catherine Shaw | Head | — | 48 | ~1892 |
| John Shaw | Son | — | 20 | ~1920 |
Census Appearances
1920
Polk, Iowa
Son, age
Polk, Iowa · implied b. ~1920 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Shaw |
| Given Name | John S. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Ohio |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Polk, Iowa
Son, age 10
Polk, Iowa · implied b. ~1920 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Shaw |
| Given Name | John A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Polk-County, Iowa
Son, age 20
Polk-County, Iowa · implied b. ~1920 — 2 household members
| Surname | Shaw |
| Given Name | John A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Occupation | Messenger |
| Industry | Bank |
| Class of Worker | PW |
| Hours Worked | 41 |
| Income (1939) | 300 |
| Highest Grade | C 1 |
| 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 Shaw across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Thomas Shaw (~0.92 confidence) and mother Catherine Shaw (~0.92 confidence) and mother Katherine Shaw (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Thomas Shaw
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Catherine Shaw
b. ~1892
Source mother
● Household
· direct · ~0.92
Mother
Katherine Shaw
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Shaw
Son · 1940 · age 20 · b. ~1920 · 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 — 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-t0627-01193-00232)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Bernard Poole | 8 | Son | — | So Dak |
| 2 | Douglas Poole | 1 | Son | — | So Dak |
| 3 | Milton L. Frost | 31 | Head | Office Mgr | Iowa |
| 4 | Gladys D. Frost | 32 | Wife | — | Iowa |
| 5 | Patricia Frost | 10 | Daughter | — | Iowa |
| 6 | Hugh Frost | 5 | Son | — | Iowa |
| 7 | Jacqueline Frost | 1 | Daughter | — | Iowa |
| 8 | Sylvester O. Ragland | 58 | Head | Mail Clerk | Missouri |
| 9 | Bessie M. Ragland | 52 | Wife | — | Missouri |
| 10 | Roscoe F. Barnhart | 42 | Head | Musician | Illinois |
| 11 | Hortense Barnhart | 41 | Wife | — | Kansas |
| 12 | Pauline Barnhart | 13 | Daughter | — | Iowa |
| 13 | Harry B. Nicol | 54 | Head | Broker | Missouri |
| 14 | Elizabeth Nicol | 60 | Wife | — | Iowa |
| 15 | Mary E. Nicol | 81 | Mother | — | Maryland |
| 16 | Edwin A. Wilcox | 47 | Head | Examiner | Iowa |
| 17 | Irene E. Wilcox | 48 | Wife | — | Minnesota |
| 18 | Ronald E. Wilcox | 11 | Son | — | Indiana |
| 19 | Robert Morris | 37 | Head | Pharmacist | Iowa |
| 20 | Iva Morris | 35 | Wife | — | Iowa |
| 21 | Robert G. Morris | 10 | Son | — | Iowa |
| 22 | Nancy L. Morris | 2 | Daughter | — | Iowa |
| 23 | Ber A. Iversen | 68 | Head | Accounting | Iowa |
| 24 | Rose B. Iversen | 67 | Wife | — | Iowa |
| 25 | Stewart Gordon | 27 | Head | Drug Clerk | Iowa |
| 26 | Ellen Gordon | 27 | Wife | Binder | Iowa |
| 27 | Byron P. Zornes | 40 | Head | Postal Clerk | Iowa |
| 28 | Ruth Zornes | 34 | Wife | — | Iowa |
| 29 | Ruth Zornes | 14 | Daughter | — | Iowa |
| 30 | Gracie M. Zornes | 13 | Daughter | — | Iowa |
| 31 | Gertrude Morgan | 62 | Lodger | Teacher | Iowa |
| 32 | Mills B. Aldridge | 53 | Head | Interviewer | Iowa |
| 33 | Blanche W. Aldridge | 51 | Wife | — | Iowa |
| 34 | Le Roy Overman | 22 | Lodger | Barber | Iowa |
| 35 | Paul L. Early | 43 | Head | Salesman | Missouri |
| 36 | Ola B. Early | 36 | Wife | Teacher | Texas |
| 37 | George A. Ramsey | 41 | Head | Salesman | Iowa |
| 38 | Erma E. Ramsey | 38 | Wife | — | Iowa |
| 39 | Catherine A. Shaw | 48 | Head | Cafeteria Helper | Iowa |
| 40 | John A. Shaw THIS PERSON | 20 | Son | Messenger | Iowa |
Pedigree Summary
John
Gen 1 · 3 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)