RC
Robert Craig — 1940 US Census Record
Model Tree available1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Robert Craig across the 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed), with identified parents Ralph & Robert — first a son (b.~1919), then head of a 3-person household.
Age 21
b. ~1919
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Craig |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Boone |
| 1935 Residence (County) | Boone |
| Additional Details | |
| Occupation | Labor |
| Industry | Bottling Co |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 78 |
| Highest Grade | No 8 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Labor |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1919 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Robert Craig | Head | — | 52 | ~1888 |
| Robert Craig | Son | — | 21 | ~1919 |
| Margaret Craig | Spouse | — | 52 | ~1888 |
Census Appearances
1920
Polk, Iowa
Son, age 2
Polk, Iowa · implied b. ~1918 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Craig |
| Given Name | Robert L |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Polk, Iowa
Son, age 12
Polk, Iowa · implied b. ~1918 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Craig |
| Given Name | Robert L |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| 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 21
Polk-County, Iowa · implied b. ~1919 — 3 household members
| Surname | Craig |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Boone |
| 1935 Residence (County) | Boone |
| Occupation | Labor |
| Industry | Bottling Co |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 78 |
| Highest Grade | No 8 |
| 1935 Residence | Iowa |
| 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 Craig across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Ralph Craig (~0.92 confidence) and father Robert Craig (~0.92 confidence) and mother Ada Craig (~0.92 confidence) and mother Edith Craig (~0.92 confidence) and mother Margaret Craig (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Ralph Craig
b. ~1890
Source father
● Household
· direct · ~0.92
Father
Robert Craig
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Ada Craig
b. ~1892
Source mother
● Household
· direct · ~0.92
Mother
Edith Craig
b. ~1894
Source mother
● Household
· direct · ~0.92
Mother
Margaret Craig
b. ~1888
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Craig
Son · 1940 · age 21 · b. ~1919 · 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-t0627-01194-00677)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Annie Payne | 49 | Head | Maid By Day | England |
| 42 | Charles E. Cornish | 78 | Head | Cabinet Maker | Iowa |
| 43 | Eva D. Cornish | 73 | Wife | — | Iowa |
| 44 | Elsie E. Cornish | 40 | Daughter | Cashier | Nebr |
| 45 | Hazel Doyle | 48 | Roomer | Filing Clerk | Ill |
| 46 | Clyde Lehman | 49 | Head | Roofer | Ill |
| 47 | Edna Lehman | 40 | Wife | Typist | Iowa |
| 48 | Anna Rantz | 52 | Sealer | Waitress | Ill |
| 49 | Floyd Idea | 29 | Head | Sales | Iowa |
| 50 | Nellie B. Idea | 22 | Wife | — | Iowa |
| 51 | Bessie Brock | 59 | Head | Waitress | Iowa |
| 52 | Louise Brock | 35 | Daughter | Stenog. | Iowa |
| 53 | Francis Kappler | 26 | Head | Inspector | Mo |
| 54 | Barbara Kappler | 23 | Wife | Sales | Iowa |
| 55 | Cella Cummings | 68 | Head | — | Iowa |
| 56 | Myrtle Rogers | 32 | Daughter | Stenog. | Iowa |
| 57 | Milo Carter | 61 | Head | Sales | Iowa |
| 58 | Lettie J. Carter | 59 | Wife | — | Iowa |
| 59 | M. J. Comer | 41 | Head | Sales | Minn |
| 60 | Hortense Comer | 31 | Wife | — | Minn |
| 61 | Don H. Johnson | 28 | Head | Collection Agent | Minn |
| 62 | Margaret Johnson | 23 | Wife | — | Iowa |
| 63 | Kenneth Taggart | 26 | Head | Tile Maker | Iowa |
| 64 | Ruth Taggart | 26 | Wife | Stenographer | Iowa |
| 65 | J. M. Roberts | 26 | Head | Sales | North Dakota |
| 66 | Marjorie Roberts | 30 | Wife | — | Iowa |
| 67 | Ralph Reay | 54 | Head | — | England |
| 68 | Ada Reay | 54 | Wife | — | England |
| 69 | Winifred Reay | 26 | Daughter | Receptionist | Iowa |
| 70 | Robert Craig | 52 | Head | Custodian | Iowa |
| 71 | Margaret Craig | 52 | Wife | Asst Custodian | Iowa |
| 72 | Robert Craig THIS PERSON | 21 | Son | Labor | Iowa |
| 73 | Ray A. Mcbride | 53 | Head | — | Iowa |
| 74 | Anna Mcbride | 55 | Wife | — | Iowa |
| 75 | Velma Mcbride | 36 | Daughter | Buyer | Iowa |
| 76 | Mary E. Mcbride | 19 | Daughter | — | Iowa |
| 77 | Wilda Jean Mcbride | 16 | Daughter | — | Iowa |
| 78 | Jr. Ray | 22 | Son | Lineman | Iowa |
| 79 | Ruth Ann Ray | 20 | Daughter in law | — | Iowa |
| 80 | Richard Ray | 4 | Grandson | — | 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)