MC
Mary Carson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Mary Carson across the 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1919), then head of a 6-person household.
Age 21
b. ~1919
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Carson |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | McKeesport city |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Clerk in Office |
| Industry | Chain Store |
| Class of Worker | PW |
| Hours Worked | 39 |
| Income (1939) | 1319 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Clerk In Office |
| Township / Ward | Mckeesport City |
| Est. Birth Year | ~1919 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Carson | Daughter | — | 21 | ~1919 |
| Joseph Carson | Son | — | 22 | ~1918 |
| Helen Carson | Daughter | — | 20 | ~1920 |
| Anastasia Hickey | Other | — | 50 | ~1890 |
| Mary Carson | Head | — | 54 | ~1886 |
| John Carson | Son | — | 25 | ~1915 |
Census Appearances
1930
Allegheny, Pennsylvania
Other, age 11
Allegheny, Pennsylvania · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carson |
| Given Name | Mary U. |
| Relationship to Head | Gr-Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Daughter, age 21
Allegheny-County, Pennsylvania · implied b. ~1919 — 6 household members
| Surname | Carson |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | McKeesport city |
| 1935 Residence (County) | Allegheny |
| Occupation | Clerk in Office |
| Industry | Chain Store |
| Class of Worker | PW |
| Hours Worked | 39 |
| Income (1939) | 1319 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| 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 Mary Carson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Carson
Daughter · 1940 · age 21 · b. ~1919 · Pennsylvania
★ You are viewing this record
Sibling
Joseph Carson
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Carson
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Carson
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
38 people indexed on this census page (nara:1940:m-t0627-03409-00044)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Barbara Ann Kerr | 0 | daughter | — | Pennsylvania |
| 43 | Neil Mcelwee | 62 | Head | Rigger | Pennsylvania |
| 44 | Catherine Mcelwee | 58 | Wife | — | Pennsylvania |
| 45 | Cornelius B Mcelwee | 31 | Son | Clerk | Pennsylvania |
| 46 | Stasia Catherine Mcelwee | 34 | Daughter | Comptometer | Pennsylvania |
| 47 | Martin Manning | 41 | Head | Detective | Pennsylvania |
| 48 | Sarah Manning | 42 | Wife | — | Pennsylvania |
| 49 | Beatrice Manning | 24 | Daughter | File Clerk | Pennsylvania |
| 50 | John F. White | 60 | Head | Health Officer | Pennsylvania |
| 51 | Margaret H. White | 48 | Wife | — | Pennsylvania |
| 52 | John F. Jr White | 27 | Son | Clerk | Pennsylvania |
| 53 | Mary Jane White | 24 | Daughter | Steno | Pennsylvania |
| 54 | William J. White | 20 | Son | Clerk | Pennsylvania |
| 55 | Margaret L. White | 13 | Daughter | — | Pennsylvania |
| 56 | Bradford C. Colecord | 42 | Head | Superintendent | Pennsylvania |
| 57 | Elizabeth P. Colecord | 38 | Wife | — | Massachusetts |
| 58 | Nancy Colecord | 10 | Daughter | — | Alabama |
| 59 | Bradford P. Colecord | 9 | Son | — | Illinois |
| 60 | Lafette Ruffing | 26 | Maid | House Maid | Pennsylvania |
| 61 | Mary Carson | 54 | Head | — | Pennsylvania |
| 62 | John Carson | 25 | Son | Clerk | Pennsylvania |
| 63 | Mary E. Carson THIS PERSON | 21 | Daughter | Clerk In Office | Pennsylvania |
| 64 | Joseph A. Carson | 22 | Son | Investigator | Pennsylvania |
| 65 | Helen E. Carson | 20 | Daughter | Office Clerk | Pennsylvania |
| 66 | Anastasia Hickey | 50 | Sister | Office Clerk | Pennsylvania |
| 67 | David Robinson | 52 | Head | Foreman | Ohio |
| 68 | Mary Robinson | 53 | Wife | — | Ohio |
| 69 | James E. Robinson | 19 | Son | Clerk | Ohio |
| 70 | Alfred Robinson | 17 | Son | — | Ohio |
| 71 | Margaret Robinson | 14 | Daughter | — | Ohio |
| 72 | John S. Mack | 60 | Head | President | Pennsylvania |
| 73 | Margaret Mack | 57 | Wife | — | Virginia |
| 74 | Gertrude Cawthorne | 51 | Maid | House Keeper | Pennsylvania |
| 75 | Charles Langley | 51 | Head | Shipper | Pennsylvania |
| 76 | Harriet Langley | 50 | Wife | — | Pennsylvania |
| 77 | Jeanne Langley | 22 | Daughter | File Clerk | Pennsylvania |
| 78 | Lois Langley | 21 | Daughter | Clerk | Pennsylvania |
| 79 | Martha J. Brookmire | 74 | Aunt | — | Pennsylvania |
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)