RC
Robert Crawford — 1940 US Census Record
Model Tree available1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Robert Crawford across the 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed), with identified parents Jess & Jesse — first a son (b.~1909), then head of a 2-person household.
Age 31
b. ~1909
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Crawford |
| Given Name | Robert E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Occupation | Jr Executive |
| Industry | Meredith Pub Co |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 2400 |
| Highest Grade | H-4 |
| 1935 Residence | Same House |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Jr Executive |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1909 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Jess Crawford | Head | — | 61 | ~1879 |
| Robert Crawford | Son | — | 31 | ~1909 |
Census Appearances
1920
Polk, Iowa
Son, age 10
Polk, Iowa · implied b. ~1910 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Crawford |
| Given Name | Robert E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Polk, Iowa
Son, age 21
Polk, Iowa · implied b. ~1909 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Crawford |
| Given Name | Robert E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Polk-County, Iowa
Son, age 31
Polk-County, Iowa · implied b. ~1909 — 2 household members
| Surname | Crawford |
| Given Name | Robert E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Occupation | Jr Executive |
| Industry | Meredith Pub Co |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 2400 |
| Highest Grade | H-4 |
| 1935 Residence | Same House |
| 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 Robert Crawford across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Jess Crawford (~0.92 confidence) and father Jesse Crawford (~0.92 confidence) and father Jesse Crawford (~0.92 confidence) and mother Harriett Crawford (~0.92 confidence) and mother Harriet Crawford (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Jess Crawford
b. ~1879
Source father
● Household
· direct · ~0.92
Father
Jesse Crawford
b. ~1879
Source father
● Household
· direct · ~0.92
Father
Jesse Crawford
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Harriett Crawford
b. ~1887
Source mother
● Household
· direct · ~0.92
Mother
Harriet Crawford
b. ~1889
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Crawford
Son · 1940 · age 31 · b. ~1909 · 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-t0627-01193-00434)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Earl C Woodward | 58 | Head | Dept Mgr | Missouri |
| 2 | Lucie S Woodward | 58 | Wife | — | Illinois |
| 3 | Sarah Rogers | 82 | Mother-in-law | — | Illinois |
| 4 | Herbert B Jacobson | 30 | Head | Fed Bank Exam | Iowa |
| 5 | Hazel B Jacobson | 27 | Wife | — | Iowa |
| 6 | Arnold H Downs | 30 | Head | Auditor | Illinois |
| 7 | Reba M Downs | 29 | Wife | — | Missouri |
| 8 | Robert L Downs | 3 | Son | — | Colorado |
| 9 | Jess R Crawford | 61 | Head | Salesman | Iowa |
| 10 | Robert E Crawford THIS PERSON | 31 | Son | Jr Executive | Iowa |
| 11 | Elton C Mahon | 57 | Head | Traveling Sales | Mississippi |
| 12 | Georgia S Mahon | 39 | Wife | — | Iowa |
| 13 | Beverly C Mahon | 17 | Son | — | Nebraska |
| 14 | John J Hobbs | 50 | Head | Foreman | Iowa |
| 15 | Bertha A B Hobbs | 46 | Wife | — | Iowa |
| 16 | Donald R Hobbs | 25 | Son | Truck Driver | Iowa |
| 17 | Harold H Hobbs | 22 | Son | Dock Hand | Iowa |
| 18 | Robert H Boyce | 31 | Head | Manager | Iowa |
| 19 | Doris M Boyce | 26 | Wife | — | Iowa |
| 20 | Judith C Boyce | 2 | Daughter | — | Iowa |
| 21 | Pearl L Tester | 50 | Mother-in-law | Housemaid | So Dakota |
| 22 | Dan C Jewel | 40 | Head | Dept Mgr | Tennessee |
| 23 | Helen L Jewel | 45 | Wife | — | Illinois |
| 24 | Marjorie L Jewel | 18 | Daughter | Secretary | Illinois |
| 25 | Joanne L Jewel | 12 | Daughter | Manager | Illinois |
| 26 | James C Moore | 44 | Head | Asst Manager | Iowa |
| 27 | Marie T Moore | 28 | Wife | — | Iowa |
| 28 | Anise M Moore | 3 | Daughter | — | Iowa |
| 29 | Janice C Moore | 2 | Daughter | — | Iowa |
| 30 | Mary J Moore | 0 | Daughter | — | Iowa |
| 31 | Ardel M Stamp | 22 | Housemaid | Housemaid | Iowa |
| 32 | Dana C Wagner | 70 | Head | — | Illinois |
| 33 | Rhea A Wagner | 68 | Wife | — | Iowa |
| 34 | Mitchell A Peer | 70 | Head | Owner | Ohio |
| 35 | Mary L Peer | 68 | Wife | — | Ohio |
| 36 | Veda M Hoffman | 26 | Lodger | Clerk | Iowa |
| 37 | Gladene Henderson | 23 | Lodger | Stenographer | Iowa |
| 38 | Gene Hrueser | 23 | Lodger | Clerk | Iowa |
| 39 | Carl W Kubec | 44 | Head | Salesman | Iowa |
| 40 | Vivian V Kubec | 42 | Wife | Society Report. | Iowa |
Pedigree Summary
Robert
Gen 1 · 5 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)