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Lois Thompson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Lois Thompson across the 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1926), then head of a 9-person household.
Age 14
b. ~1926
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Thompson |
| Given Name | Lois |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Pittsburgh |
| Est. Birth Year | ~1926 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Lois | Age | Birth yr |
|---|---|---|---|---|
| William Thompson | Son | — | 10 | ~1930 |
| Margaret Thompson | Daughter | — | 11 | ~1929 |
| Finley Thompson | Head | — | 38 | ~1902 |
| Flora Thompson | Spouse | — | 38 | ~1902 |
| Finley Thompson | Son | — | 15 | ~1925 |
| Raymond Thompson | Son | — | 2 | ~1938 |
| Harry Thompson | Son | — | 12 | ~1928 |
| Betty Thompson | Daughter | — | 6 | ~1934 |
| Lois Thompson | Daughter | — | 14 | ~1926 |
Census Appearances
1930
Allegheny, Pennsylvania
Daughter, age 3
Allegheny, Pennsylvania · implied b. ~1927 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | Lois |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | England |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Daughter, age 14
Allegheny-County, Pennsylvania · implied b. ~1926 — 9 household members
| Surname | Thompson |
| Given Name | Lois |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Class of Worker | 0 |
| Highest Grade | No 7 |
| 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 Lois Thompson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Lois Thompson
Daughter · 1940 · age 14 · b. ~1926 · Pennsylvania
★ You are viewing this record
Sibling
Harry Thompson
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Thompson
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Thompson
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Raymond Thompson
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Finley Thompson
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Thompson
Sibling · 1940 · age 10
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-t0627-03656-00291)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Thomas Robinson | 13 | son | — | Pennsylvania |
| 2 | Elizabeth Gladden | 75 | head | Storekeeper | Pennsylvania |
| 3 | Ruth Carmody | 47 | daughter | — | Pennsylvania |
| 4 | Patrick | 41 | son-in-law | Clerk | Pennsylvania |
| 5 | Howard G. Wright | 52 | head | Bookkeeper | Pennsylvania |
| 6 | Lillie Roxbrough | 57 | cousin | — | Pennsylvania |
| 7 | Thomas Mcgoldrick | 69 | head | — | Pennsylvania |
| 8 | Agnes Mcgoldrick | 59 | wife | — | West Va. |
| 9 | Eleanor Mcgoldrick | 32 | daughter | Cigar Maker | Pennsylvania |
| 10 | Jane Mcgoldrick | 26 | daughter | Cigar Maker | Pennsylvania |
| 11 | Margaret Mcgoldrick | 23 | daughter | — | Pennsylvania |
| 12 | Ailene Lakes | 11 | daughter | — | Pennsylvania |
| 13 | Clarence Davis | 31 | head | Weighmaster | Pennsylvania |
| 14 | Elizabeth Davis | 29 | wife | — | Pennsylvania |
| 15 | George Davis | 9 | son | — | Pennsylvania |
| 16 | Arthur Davis | 7 | son | — | Pennsylvania |
| 17 | Richard Davis | 6 | son | — | Pennsylvania |
| 18 | Daniel Davis | 5 | son | — | Pennsylvania |
| 19 | Vincent Frogge | 30 | head | Apprentice | Pennsylvania |
| 20 | Emma Frogge | 26 | wife | — | Pennsylvania |
| 21 | William Frogge | 5 | son | — | Pennsylvania |
| 22 | Felix Frogge | 20 | brother | Drilling Dam | Pennsylvania |
| 23 | James Smith | 38 | head | Truck Driver | Pennsylvania |
| 24 | Ruth Smith | 33 | wife | — | Pennsylvania |
| 25 | Finley Thompson | 38 | head | Truck Driver | Maryland |
| 26 | Flora Thompson | 38 | wife | — | Ohio |
| 27 | Finley Jr. Thompson | 15 | son | — | Pennsylvania |
| 28 | Lois Thompson THIS PERSON | 14 | daughter | — | Pennsylvania |
| 29 | Harry Thompson | 12 | son | — | Pennsylvania |
| 30 | Margaret Thompson | 11 | daughter | — | Pennsylvania |
| 31 | William Thompson | 10 | son | — | Pennsylvania |
| 32 | Betty J. Thompson | 6 | daughter | — | Pennsylvania |
| 33 | Raymond Thompson | 2 | son | — | Pennsylvania |
| 34 | Lucy Bonartini | 59 | head | — | Italy |
| 35 | Frank O'Neil | 58 | head | — | Pennsylvania |
| 36 | James O'Neil | 27 | son | Laborer | Pennsylvania |
| 37 | Mercedes O'Neil | 24 | daughter | Maid | Pennsylvania |
| 38 | Bernard O'Neil | 22 | son | Wait Waiter | Pennsylvania |
| 39 | Edward O'Neil | 21 | son | Wait Waiter | Pennsylvania |
| 40 | Joseph Gillig | 68 | head | Night Watcher | 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)