JJ
Joseph Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Joseph Johnson across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Charles & Charles — first a son (b.~1916), then head of a 5-person household.
Age 24
b. ~1916
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Johnson |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Swissvale Borough |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No-5 |
| 1935 Residence | Same Place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Swissvale Borough |
| Est. Birth Year | ~1916 |
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 Joseph | Age | Birth yr |
|---|---|---|---|---|
| Margaret Johnson | Daughter | — | 22 | ~1918 |
| Charles Johnson | Head | — | 63 | ~1877 |
| Joseph Johnson | Son | — | 24 | ~1916 |
| Charles Johnson | Son | — | 26 | ~1914 |
| Margaret Johnson | Spouse | — | 50 | ~1890 |
Census Appearances
1920
Allegheny, Pennsylvania
Son, age 3
Allegheny, Pennsylvania · implied b. ~1917 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Joseph |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Son, age 14
Allegheny, Pennsylvania · implied b. ~1916 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Joseph E. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Son, age 24
Allegheny-County, Pennsylvania · implied b. ~1916 — 5 household members
| Surname | Johnson |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Swissvale Borough |
| 1935 Residence (County) | Allegheny |
| Income (1939) | 0 |
| Highest Grade | No-5 |
| 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 Joseph Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charles Johnson (~0.92 confidence) and father Charles Johnson (~0.92 confidence) and mother Margaret Johnson (~0.92 confidence) and mother Margaret Johnson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Johnson
b. ~1878
Source father
● Household
· direct · ~0.92
Father
Charles Johnson
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Margaret Johnson
b. ~1890
Source mother
● Household
· direct · ~0.92
Mother
Margaret Johnson
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Joseph Johnson
Son · 1940 · age 24 · b. ~1916 · Pennsylvania
★ You are viewing this record
Sibling
Margaret Johnson
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Johnson
Sibling · 1940 · age 26
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-t0627-03418-00672)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Edward P. Murphy | 56 | Head | Car Inspector | Pennsylvania |
| 42 | Elizabeth Murphy | 53 | Wife | — | Pennsylvania |
| 43 | John B. Murphy | 25 | Son | Laborer | Pennsylvania |
| 44 | Edward Murphy | 16 | Son | — | Pennsylvania |
| 45 | Horace Robertshaw | 37 | Head | Inspector | England |
| 46 | Nellie Robertshaw | 35 | Wife | — | Pennsylvania |
| 47 | Horace Robertshaw | 15 | Son | — | Pennsylvania |
| 48 | Harry Robertshaw | 12 | Son | — | Pennsylvania |
| 49 | Jack Robertshaw | 10 | Son | — | Pennsylvania |
| 50 | Ronald Robertshaw | 5 | Son | — | Pennsylvania |
| 51 | Audrey Robertshaw | 2 | Daughter | — | Pennsylvania |
| 52 | George E. Mayer | 45 | Head | Photographer | Pennsylvania |
| 53 | Bessie E. Mayer | 47 | Wife | — | Pennsylvania |
| 54 | George P. Mayer | 23 | Son | Clerical | Pennsylvania |
| 55 | Esther Mayer | 19 | Daughter | Clerical | Pennsylvania |
| 56 | Raymond Mayer | 17 | Son | — | Pennsylvania |
| 57 | Margaret Mayer | 12 | Daughter | — | Pennsylvania |
| 58 | Betty J. Mayer | 10 | Daughter | — | Pennsylvania |
| 59 | Virginia Mayer | 7 | Daughter | — | Pennsylvania |
| 60 | Charles W. B. Johnson | 63 | Head | Conductor | Maryland |
| 61 | Margaret Johnson | 50 | Wife | — | Maryland |
| 62 | Charles Johnson | 26 | Son | Laborer | Pennsylvania |
| 63 | Joseph Johnson THIS PERSON | 24 | Son | — | Pennsylvania |
| 64 | Margaret Johnson | 22 | Daughter | Clerical | Pennsylvania |
| 65 | William Peterson | 48 | Head | Fitter | Sweden |
| 66 | Sarah Peterson | 47 | Wife | — | Pennsylvania |
| 67 | Dorothy Peterson | 22 | Daughter | Bank Clerk | Pennsylvania |
| 68 | William Peterson | 20 | Son | — | Pennsylvania |
| 69 | Mildred Peterson | 17 | Daughter | — | Pennsylvania |
| 70 | William Caldwell | 71 | Brother-in-law | — | Pennsylvania |
| 71 | Lydia Caldwell | 71 | Mother-in-law | — | Pennsylvania |
| 72 | Arthur G. Murch | 38 | Head | Third Man | Pennsylvania |
| 73 | Margaret P. Murch | 36 | Wife | — | Pennsylvania |
| 74 | Marie Murch | 17 | Daughter | — | Pennsylvania |
| 75 | Arthur Murch | 7 | Son | — | Pennsylvania |
| 76 | Irene Oaks | 66 | Mother-in-law | — | Pennsylvania |
| 77 | Raymond Jacques | 53 | Head | Meat Cutter | West Virginia |
| 78 | Edna B. Jacques | 49 | Wife | — | Pennsylvania |
| 79 | June Jacques | 25 | Daughter | Saleslady | Pennsylvania |
| 80 | Della Jacques | 21 | Daughter | Stenographer | Pennsylvania |
Pedigree Summary
Joseph + 2 siblings
Gen 1 · 4 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)