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Sarah Mason — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Johnson-County, Iowa
Our Model Tree links this Sarah Mason across the 1930 and 1940 US Censuses in Johnson-County, Iowa (XGBoost, ~Confirmed) — first a daughter (b.~1917), then head of a 6-person household.
Age 23
b. ~1917
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Johnson-County, Iowa |
| Surname | Mason |
| Given Name | Sarah |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Council Bluffs |
| Additional Details | |
| Occupation | House Maid |
| Industry | Private Home |
| Class of Worker | PW |
| Hours Worked | 8 |
| Income (1939) | 500 |
| Highest Grade | Hs 2 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | House Maid |
| Township / Ward | Iowa City |
| Est. Birth Year | ~1917 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Sarah | Age | Birth yr |
|---|---|---|---|---|
| Marjorie Mason | Daughter | — | 31 | ~1909 |
| Carmen Mason | Son | — | 24 | ~1916 |
| Sarah Mason | Daughter | — | 23 | ~1917 |
| Charles Mason | Son | — | 21 | ~1919 |
| Ruth Mason | Daughter | — | 33 | ~1907 |
| Bertha Mason | Head | — | 62 | ~1878 |
Census Appearances
1930
Johnson, Iowa
Daughter, age 13
Johnson, Iowa · implied b. ~1917 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | Sara |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| 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
Johnson-County, Iowa
Daughter, age 23
Johnson-County, Iowa · implied b. ~1917 — 6 household members
| Surname | Mason |
| Given Name | Sarah |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Council Bluffs |
| Occupation | House Maid |
| Industry | Private Home |
| Class of Worker | PW |
| Hours Worked | 8 |
| Income (1939) | 500 |
| Highest Grade | Hs 2 |
| 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 Sarah Mason across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Sarah Mason
Daughter · 1940 · age 23 · b. ~1917 · Iowa
★ You are viewing this record
Sibling
Ruth Mason
Sibling · 1940 · age 33
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Mason
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Carmen Mason
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marjorie Mason
Sibling · 1940 · age 31
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Johnson-County, Iowa
Open full size
1940 US Federal Census — Johnson-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01171-00420)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John Novak | 61 | Head | Carpenter | Iowa |
| 2 | Mary Novak | 61 | Wife | — | Iowa |
| 3 | Mervin Novak | 42 | Son | Carpenter | Iowa |
| 4 | Homer Hess | 46 | Head | Gauger | Missouri |
| 5 | Pearl Hess | 44 | Wife | — | Missouri |
| 6 | Edward Michael | 56 | Head | — | Iowa |
| 7 | Bertha Mason | 62 | Head | — | Iowa |
| 8 | Ruth Mason | 33 | Daughter | Teacher | Iowa |
| 9 | Marjorie Mason | 31 | Daughter | — | Iowa |
| 10 | Carmen Mason | 24 | Son | Laborer | Iowa |
| 11 | Sarah Mason THIS PERSON | 23 | Daughter | House Maid | Iowa |
| 12 | Charles W. Mason | 21 | Son | Laborer | Iowa |
| 13 | Clark E. Tanberg | 49 | Head | Salesman | Iowa |
| 14 | Orene K. Tanberg | 45 | Wife | — | Iowa |
| 15 | Edward Grunwell | 21 | Head | Janitor | Iowa |
| 16 | Eudenia Grunwell | 24 | Wife | — | Iowa |
| 17 | Edward Grunwell | 3 | Son | — | Iowa |
| 18 | Elizabeth Skillig | 43 | Head | Cook | Iowa |
| 19 | Betty Skillig | 19 | Daughter | — | Iowa |
| 20 | Phillip Skillig | 17 | Son | Usher | Iowa |
| 21 | James Krofta | 69 | Head | — | Iowa |
| 22 | William Krofta | 55 | Brother | — | Iowa |
| 23 | Charles Yavorsky | 64 | Head | — | Iowa |
| 24 | Edith Yavorsky | 50 | Wife | — | Nebraska |
| 25 | Fred Gore | 45 | Head | Truck Driver | Iowa |
| 26 | Evelyn Gore | 39 | Wife | — | Iowa |
| 27 | Marjorie Gore | 16 | Daughter | — | Iowa |
| 28 | Frederick Gore | 14 | Son | — | Iowa |
| 29 | Leo Gore | 12 | Son | — | Iowa |
| 30 | Shirley Gore | 9 | Daughter | — | Iowa |
| 31 | Robert Gore | 7 | Son | — | Iowa |
| 32 | Jimmy Gore | 2 | Son | — | Iowa |
| 33 | Donald White | 20 | Boarder | Dairyman | Iowa |
| 34 | Catherine White | 18 | Daughter | — | Iowa |
| 35 | Donald R. White | 1 | Grandson | — | Iowa |
| 36 | Charles Newmire | 45 | Head | Tractor Operator | Iowa |
| 37 | Della Newmire | 47 | Wife | — | Iowa |
| 38 | Eugene Newmire | 17 | Son | Painter | Iowa |
| 39 | Delores Newmire | 8 | Daughter | — | Iowa |
| 40 | Clarence Hauber | 28 | Step Son | Bar Tender | 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)