JJ
Julia Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Julia Johnson across the 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed) — first a spouse (b.~1887), then head of a 5-person household.
Age 53
b. ~1887
Female
Spouse
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Johnson |
| Given Name | Julia O. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1887 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Julia | Age | Birth yr |
|---|---|---|---|---|
| Bernice Hart | Daughter | — | 22 | ~1918 |
| Carl Johnson | Head | — | 60 | ~1880 |
| Nancy Hart | Other | — | 7 | ~1933 |
| Arnell Johnson | Son | — | 24 | ~1916 |
| Julia Johnson | Spouse | — | 53 | ~1887 |
Census Appearances
1920
Polk, Iowa
Spouse, age 32
Polk, Iowa · implied b. ~1888 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Julia E |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Iowa |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Polk, Iowa
Spouse, age 42
Polk, Iowa · implied b. ~1888 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Julia E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 18 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Polk-County, Iowa
Spouse, age 53
Polk-County, Iowa · implied b. ~1887 — 5 household members
| Surname | Johnson |
| Given Name | Julia O. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 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 Julia Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Julia Johnson
Spouse · 1940 · age 53 · b. ~1887 · 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-t0627-01197-00521)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Carl Johnson | 60 | Head | Receiving Clerk | Iowa |
| 42 | Julia O. Johnson THIS PERSON | 53 | Wife | — | Iowa |
| 43 | Arnell Johnson | 24 | Son | Machine Feeder | Iowa |
| 44 | Bernice Hart | 22 | Daughter | Trimmer/Sealer | Iowa |
| 45 | Nancy J. Hart | 7 | Granddaughter | — | Iowa |
| 46 | Hans D. Barrow | 53 | Head | Grocer | Iowa |
| 47 | Helga Barrow | 50 | Wife | — | Norway |
| 48 | Rydell Barrow | 25 | Son | Service Clerk | Iowa |
| 49 | Wayne Barrow | 21 | Son | Machine Oper. | Iowa |
| 50 | J. Robert Barrow | 19 | Son | Machine Helper | Iowa |
| 51 | Jack E. Kendall | 29 | Son-in-law | School Teacher | Iowa |
| 52 | Ethel Kendall | 29 | Daughter | — | Iowa |
| 53 | Jack D. Kendall | 3 | Grandson | — | Iowa |
| 54 | Martin D. Dougall | 72 | Head | — | England |
| 55 | Maria Dougall | 70 | Wife | — | England |
| 56 | Emma Dougall | 31 | Daughter | Office Clerk | Iowa |
| 57 | Wm. D. Brennan | 31 | Head | Motorman | Iowa |
| 58 | Wilma D. Brennan | 32 | Wife | Motorman | Iowa |
| 59 | Donna Brennan | 10 | Daughter | — | Iowa |
| 60 | Ray D. Hopkins | 39 | Head | Salesman | Iowa |
| 61 | Josephine Hopkins | 38 | Wife | Checker | Iowa |
| 62 | Joseph Hopkins | 16 | Son | — | Iowa |
| 63 | Leonard B. Hopkins | 14 | Son | — | Iowa |
| 64 | Richard Hopkins | 13 | Son | — | Iowa |
| 65 | Hopkins | 12 | Daughter | — | Iowa |
| 66 | Fred B. Thomas | 67 | Head | — | Iowa |
| 67 | Daisy Ruth Thomas | 62 | Wife | — | Indiana |
| 68 | William Waggoner | 24 | Head | Truck Driver | Iowa |
| 69 | Elizabeth Waggoner | 26 | Wife | — | Iowa |
| 70 | Irene Waggoner | 1 | Daughter | — | Iowa |
| 71 | Roy Marsel | 55 | Head | — | Iowa |
| 72 | Nettie Marsel | 48 | Wife | — | Missouri |
| 73 | William Marsel | 84 | Father | — | Iowa |
| 74 | Oliver Plastow | 41 | Step-son | — | Illinois |
| 75 | Howard Hobbs | 21 | Head | Tree Trimmer | Iowa |
| 76 | Dorothy Hobbs | 19 | Wife | — | Missouri |
| 77 | Jerry Hobbs | 3 | Son | — | Iowa |
| 78 | Robert Hobbs | 2 | Son | — | Iowa |
| 79 | David B. Hallinger | 54 | Head | Foreman (Steel) | New York |
| 80 | Roberta Hallinger | 45 | Wife | — | India |
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)