MJ
Mildred Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Mildred Johnson across the 1910, 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents William & William — first a daughter (b.~1910), then head of a 4-person household.
Age 30
b. ~1910
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Johnson |
| Given Name | Mildred |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Bellevue Boro |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Stenographer |
| Industry | Private College |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Stenographer |
| Township / Ward | Bellevue Boro |
| Est. Birth Year | ~1910 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mildred | Age | Birth yr |
|---|---|---|---|---|
| Martha Johnson | Daughter | — | 20 | ~1920 |
| Mildred Johnson | Daughter | — | 30 | ~1910 |
| William Johnson | Head | — | 58 | ~1882 |
| Laura Johnson | Spouse | — | 59 | ~1881 |
Census Appearances
1910
Allegheny, Pennsylvania
Daughter, age
Allegheny, Pennsylvania · implied b. ~1910 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Mildred L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1920
Allegheny, Pennsylvania
Daughter, age 10
Allegheny, Pennsylvania · implied b. ~1910 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Mildred L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Daughter, age 20
Allegheny, Pennsylvania · implied b. ~1910 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Mildred A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Daughter, age 30
Allegheny-County, Pennsylvania · implied b. ~1910 — 4 household members
| Surname | Johnson |
| Given Name | Mildred |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Bellevue Boro |
| 1935 Residence (County) | Allegheny |
| Occupation | Stenographer |
| Industry | Private College |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Mildred Johnson across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Johnson (~0.92 confidence) and father William Johnson (~0.92 confidence) and father William Johnson (~0.92 confidence) and mother Laura Johnson (~0.92 confidence) and mother Laura Johnson (~0.92 confidence) and mother Laura Johnson (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Johnson
b. ~1881
Source father
● Household
· direct · ~0.92
Father
William Johnson
b. ~1882
Source father
● Household
· direct · ~0.92
Father
William Johnson
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Laura Johnson
b. ~1881
Source mother
● Household
· direct · ~0.92
Mother
Laura Johnson
b. ~1881
Source mother
● Household
· direct · ~0.92
Mother
Laura Johnson
b. ~1883
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mildred Johnson
Daughter · 1940 · age 30 · b. ~1910 · Pennsylvania
★ You are viewing this record
Sibling
Martha Johnson
Sibling · 1940 · age 20
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 — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03397-00708)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Dora Jane Mcroberts | 12 | Daughter | — | Pennsylvania |
| 42 | Harry Mcroberts | 6 | Son | — | Pennsylvania |
| 43 | Frederick Keister | 32 | Brother-in-law | — | Pennsylvania |
| 44 | Gardiner Hanley | 35 | Head | Salesman | Canada |
| 45 | Mary Hanley | 34 | Wife | — | Canada |
| 46 | Donald Hanley | 6 | Son | — | Minnesota |
| 47 | Albert E. P. Kerr | 61 | Head | Printer | Pennsylvania |
| 48 | Mary Jane Kerr | 63 | Wife | — | Pennsylvania |
| 49 | Dorothy Taylor | 35 | Daughter | — | Pennsylvania |
| 50 | George Himmelman | 44 | Head | Minister | Ohio |
| 51 | Mary Himmelman | 39 | Wife | — | Pennsylvania |
| 52 | Paul Himmelman | 17 | Son | — | Pennsylvania |
| 53 | Robert Himmelman | 14 | Son | — | Pennsylvania |
| 54 | Jean Himmelman | 12 | Daughter | — | Pennsylvania |
| 55 | Donald Himmelman | 9 | Son | — | Pennsylvania |
| 56 | Robert Sloan | 42 | Head | Credit Manager | Pennsylvania |
| 57 | Helene Sloan | 38 | Wife | — | Pennsylvania |
| 58 | Mary Sloan | 8 | Daughter | — | Pennsylvania |
| 59 | Helen Jane Sloan | 7 | Daughter | — | Pennsylvania |
| 60 | Edith Sloan | 2 | Daughter | — | Pennsylvania |
| 61 | William S. Kenyon | 52 | Head | Proprietor - Roller | Pennsylvania |
| 62 | Edna F. Kenyon | 52 | Wife | — | Pennsylvania |
| 63 | Jessie Kenyon | 30 | Daughter | Comptometer Operator | Pennsylvania |
| 64 | Doris Kenyon | 17 | Daughter | — | Pennsylvania |
| 65 | Mildred Kenyon | 15 | Daughter | — | Pennsylvania |
| 66 | William Kenyon | 11 | Son | — | Pennsylvania |
| 67 | Edward H. Lutter | 57 | Head | Merchandise Broker | Pennsylvania |
| 68 | Helen Lutter | 51 | Wife | — | Pennsylvania |
| 69 | Edward H. Jr. Lutter | 29 | Son | Broker - Merchandise | Pennsylvania |
| 70 | Margaret Swope | 36 | Maid | Maid | Pennsylvania |
| 71 | Nora Mae Swope | 12 | — | — | Pennsylvania |
| 72 | William Johnson | 58 | Head | Law Clerk | Pennsylvania |
| 73 | Laura A. Johnson | 59 | Wife | — | Pennsylvania |
| 74 | Mildred Johnson THIS PERSON | 30 | Daughter | Stenographer | Pennsylvania |
| 75 | Martha Johnson | 20 | Daughter | — | Pennsylvania |
| 76 | Clifford R. Egger | 55 | Head | Janitor | Pennsylvania |
| 77 | Stella E. Egger | 55 | Wife | — | Pennsylvania |
| 78 | Mildred E. Hale | 31 | Daughter | — | Pennsylvania |
| 79 | Helen M. Howard | 30 | Daughter | Bookkeeping Clerk | Pennsylvania |
| 80 | Extra Line Howard | None | — | — | Pennsylvania |
Pedigree Summary
Mildred + 1 sibling
Gen 1 · 6 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)