MJ
Margaret Johnston — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Scott-County, Iowa
Our Model Tree links this Margaret Johnston across the 1930 and 1940 US Censuses in Scott-County, Iowa (XGBoost, ~Confirmed) — first a daughter (b.~1927), then head of a 8-person household.
Age 13
b. ~1927
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Scott-County, Iowa |
| Surname | Johnston |
| Given Name | Margaret E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Davenport City |
| 1935 Residence (County) | Scott |
| Additional Details | |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Davenport City |
| Est. Birth Year | ~1927 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| Mildred Johnston | Daughter | — | 22 | ~1918 |
| Sara Johnston | Spouse | — | 55 | ~1885 |
| Margaret Johnston | Daughter | — | 13 | ~1927 |
| Ralph Johnston | Son | — | 27 | ~1913 |
| Gerton Johnston | Son | — | 17 | ~1923 |
| James Johnston | Head | — | 56 | ~1884 |
| Edith Johnston | Daughter | — | 18 | ~1922 |
| William Johnston | Son | — | 9 | ~1931 |
Census Appearances
1930
Scott, Iowa
Daughter, age 3
Scott, Iowa · implied b. ~1927 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnston |
| Given Name | Margaret C |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Maine |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Scott-County, Iowa
Daughter, age 13
Scott-County, Iowa · implied b. ~1927 — 8 household members
| Surname | Johnston |
| Given Name | Margaret E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Davenport City |
| 1935 Residence (County) | Scott |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | 7 |
| 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 Margaret Johnston across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Margaret Johnston
Daughter · 1940 · age 13 · b. ~1927 · Iowa
★ You are viewing this record
Sibling
William Johnston
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gerton Johnston
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ralph Johnston
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edith Johnston
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mildred Johnston
Sibling · 1940 · age 22
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 — Scott-County, Iowa
Open full size
1940 US Federal Census — Scott-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01202-00993)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Albert F. Schultze | 19 | Head | — | Iowa |
| 42 | Edward J. Schultze | 17 | Son | — | Iowa |
| 43 | Robert L. Schultze | 15 | Son | — | Iowa |
| 44 | Joseph J. Stalder | 42 | Head | Operator | Illinois |
| 45 | Alice M. Stalder | 37 | Wife | — | Iowa |
| 46 | Dorothy A. Stalder | 13 | Daughter | — | Iowa |
| 47 | Billy D. Stalder | 11 | Daughter | — | Iowa |
| 48 | John Huendling | 29 | Head | Truck Driver | Iowa |
| 49 | Marion E. Q. Huendling | 23 | Wife | — | Iowa |
| 50 | Alvina Horn | 73 | Head | — | Iowa |
| 51 | Hilda M. (Ab) Horn | 51 | Daughter | High School Teacher | Iowa |
| 52 | Edward H. Burmeister | 55 | Head | Plumber | Iowa |
| 53 | Ella A. Burmeister | 52 | Wife | — | Iowa |
| 54 | Elmer E. Burmeister | 19 | Son | New Worker | Iowa |
| 55 | Frances L. Burmeister | 17 | Daughter | — | Iowa |
| 56 | Leroy H. Q. Burmeister | 29 | Head | Stone Cutter | Iowa |
| 57 | Mary E. Burmeister | 25 | Wife | — | Iowa |
| 58 | Erna Luck | 63 | Head | — | Germany |
| 59 | Katharine Stagronas | 75 | Head | — | Iowa |
| 60 | Fred Q. Zimmerman | 78 | Head | — | Germany |
| 61 | Amelia Zimmerman | 75 | Wife | — | Iowa |
| 62 | James A. Johnston | 56 | Head | Machinist | Maine |
| 63 | Sara B. Johnston | 55 | Wife | — | Iowa |
| 64 | Ralph L. Johnston | 27 | Son | Bartender | Maine |
| 65 | Mildred D. Johnston | 22 | Daughter | Stenographer | Iowa |
| 66 | Edith C. Johnston | 18 | Daughter | — | Iowa |
| 67 | Gerton A. Johnston | 17 | Son | — | Iowa |
| 68 | Margaret E. Johnston THIS PERSON | 13 | Daughter | — | Iowa |
| 69 | William W. Johnston | 9 | Son | — | Iowa |
| 70 | Nels P. Petersen | 41 | Head | Butter Maker | Denmark |
| 71 | Dagny B. Petersen | 35 | Wife | Cream Tester | Denmark |
| 72 | Ernest C. Prester | 49 | Head | Distributor | Germany |
| 73 | Helene Prester | 48 | Wife | Cream Tester | Germany |
| 74 | Erna Prester | 21 | Daughter | Stenographer | Germany |
| 75 | August Zimmerman | 63 | Head | Truck Driver | Germany |
| 76 | Dorothy H. Q. Zimmerman | 53 | Wife | — | Iowa |
| 77 | Frederick W. Zimmerman | 32 | Son | Washing Machine Salesman | Iowa |
| 78 | Norma C. Zimmerman | 20 | Daughter | Stenographer | Iowa |
| 79 | Frank M. Hellwege | 39 | Head | Tool Maker | Germany |
| 80 | Francisca B. Hellwege | 39 | Wife | — | Germany |
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)